A screw pump stator structure

Abstract

The utility model discloses a kind of screw pump stator structures, including shell and the bushing being set in shell, the both ends of bushing are provided with end plate, and the periphery of end plate is fixedly connected to the inner wall of shell;One side of shell is equipped with inlet flange pipe, the other side is equipped with outlet flange pipe, bushing is located in shell and is set to outlet flange pipe, and the side of bushing facing outlet flange pipe is fixedly connected to the inner wall of shell;Outlet flange pipe communicates bushing, inlet flange pipe communicates the inner cavity formed between shell and bushing, the upper end and lower end of end plate are symmetrically provided with multiple grid holes, the inside of grid hole communicates inner cavity, and the outside communicates the buffer cavity formed outside end plate.The screw pump stator structure converts one-side liquid inlet of bushing end into upside and downside liquid inlet simultaneously, shunts to liquid inlet, then utilizes multiple grid holes to scatter fluid, improves liquid suction effect.

Description

Technical Field

[0001] This utility model relates to the field of screw pumps, specifically to a screw pump stator structure. Background Technology

[0002] A screw pump typically consists of one or more meshing screws that rotate within the pump body (stator). Through the meshing and varying clearances between the screws, fluid is propelled from the suction end to the discharge end. The pumping process is continuous; the fluid moves axially along the screws under their influence. Depending on the configuration of the screw's external thread, a screw pump can provide either single-end or double-end delivery. For single-end delivery, the external thread is a unidirectional helix; for double-end delivery, the external thread is a bidirectional reverse helix.

[0003] Patent CN215333400U discloses a combined support and positioning double-suction twin-screw pump, including a pump body, a driving screw, and a driven screw. The driving screw and the driven screw are installed in the pump body along the axial direction of the pump body. A front cover is provided at one end of the pump body, and a rear cover is provided at the other end. Two radial positioning elements are respectively provided in the front cover and the rear cover. Both ends of the driving screw and the driven screw pass through the radial positioning elements. A bearing seat and a gearbox are also provided on the front cover. Two axial positioning elements are provided in the bearing seat. The driving screw and the driven screw are axially positioned by one axial positioning element respectively.

[0004] This double-suction twin-screw pump draws liquid in from the middle of the casing, flows to both ends, and then draws the liquid into the middle of the bushing through the meshing rotation of the twin screws, finally discharging it from the outlet.

[0005] When the liquid enters the outer end of the twin-screw, it flows directly from one side, forming a vertical flow path. Due to the large lateral flow velocity and the lack of buffering before flow, the flow direction changes by 90°, resulting in poor liquid suction into the twin-screw. Utility Model Content

[0006] The purpose of this invention is to provide a screw pump stator structure that converts the single-sided liquid inlet at the bushing end into simultaneous liquid inlet from the upper and lower sides, thereby splitting the liquid inlet and using multiple grid holes to disperse the fluid, thus improving the liquid suction effect.

[0007] To achieve the above objectives, this utility model provides a screw pump stator structure, which includes a housing and a bushing disposed within the housing. End plates are provided at both ends of the bushing, and the periphery of the end plates is fixed to the inner wall of the housing. An inlet flange is provided on one side of the housing, and an outlet flange is provided on the other side. The bushing is located on the housing, offset towards the outlet flange, and the side of the bushing facing the outlet flange is fixed to the inner wall of the housing. The outlet flange connects to the bushing, and the inlet flange connects to the cavity formed between the housing and the bushing. Multiple grid holes are symmetrically arranged at the upper and lower ends of the end plates. The inner side of each grid hole connects to the cavity, and the outer side connects to a buffer cavity formed outside the end plate.

[0008] Preferably, the grid holes are multiple vertically arranged elongated holes, the inner ends of which are tangent to the outer wall of the bushing, and the outer ends of which are tangent to the inner wall of the outer shell.

[0009] Preferably, a dividing plate is fixedly sleeved in the middle of the bushing, the outer side of the dividing plate is fixed to the inner wall of the outer shell, and the dividing plate is located at the central axial surface of the inlet flange pipe.

[0010] Preferably, a support column is fixedly connected to the bottom of the outer casing, and mounting plates are fixedly connected to the left and right sides of the bottom of the support column, with multiple mounting holes provided on the mounting plates.

[0011] Preferably, the support column is a square tube column, and the interior of the square tube column is a hollow structure.

[0012] Preferably, the outer edges at both ends of the outer shell are provided with a plurality of protrusions, and the protrusions are provided with through holes.

[0013] Preferably, the bushing is a single-screw bushing or a double-screw bushing.

[0014] According to the above technical solution, this utility model provides a screw pump stator structure, which includes a housing and a bushing disposed within the housing. End plates are provided at both ends of the bushing, and the periphery of the end plates is fixed to the inner wall of the housing. An inlet flange is provided on one side of the housing, and an outlet flange is provided on the other side. The bushing is located on the housing, offset towards the outlet flange, and the side of the bushing facing the outlet flange is fixed to the inner wall of the housing. The outlet flange connects to the bushing, and the inlet flange connects to the cavity formed between the housing and the bushing. Multiple grid holes are symmetrically arranged at the upper and lower ends of the end plates. The inner side of each grid hole connects to the cavity, and the outer side connects to a buffer cavity formed outside the end plate.

[0015] The stator structure of this screw pump utilizes an eccentric bushing design to create a horizontal U-shaped internal cavity. Liquid enters through the inlet flange and is dispersed to the upper and lower areas of the internal cavity. Finally, it enters the buffer chamber through multiple grid holes at both ends, and then, under the conveying action of the built-in screw, enters the middle of the bushing and exits through the outlet flange. This screw pump stator structure converts the single-sided liquid inlet at the bushing end into simultaneous inlet from the upper and lower sides, thus diverting the liquid flow. Multiple grid holes further disperse the fluid, and the opposing flow of liquid from the upper and lower sides weakens the lateral movement velocity of the fluid, reducing the liquid velocity at the bushing port and creating a buffer. This reduces the impact of lateral liquid flow on the screw's suction, improving the liquid suction effect.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the stator structure of a screw pump;

[0019] Figure 2 This is a right view of a preferred embodiment of the stator structure of a screw pump;

[0020] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure;

[0021] Figure 4 yes Figure 2 A schematic diagram of the BB cross-sectional structure;

[0022] Figure 5 yes Figure 4 A schematic diagram of the CC cross-sectional structure.

[0023] Explanation of reference numerals in the attached figures

[0024] 1-Outer shell; 2-Inlet flange; 3-Outlet flange; 4-Bushing; 5-End plate; 6-Grid hole; 7-Support column; 8-Mounting plate; 9-Buffer cavity; 10-Divider plate; 11-Inner cavity; 12-Protrusion. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0026] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0027] See Figure 1-5 The screw pump stator structure shown includes a housing 1 and a bushing 4 disposed within the housing 1. End plates 5 are provided at both ends of the bushing 4, and the periphery of the end plates 5 is fixed to the inner wall of the housing 1. An inlet flange 2 is provided on one side of the housing 1, and an outlet flange 3 is provided on the other side. The bushing 4 is located on the housing 1, offset from the outlet flange 3, and the side of the bushing 4 facing the outlet flange 3 is fixed to the inner wall of the housing 1. The outlet flange 3 connects to the bushing 4, and the inlet flange 2 connects to the inner cavity 11 formed between the housing 1 and the bushing 4. Multiple grid holes 6 are symmetrically provided at the upper and lower ends of the end plates 5. The inner side of the grid holes 6 connects to the inner cavity 11, and the outer side connects to a buffer cavity 9 formed outside the end plates 5.

[0028] Through the implementation of the above technical solution, the stator structure of the screw pump, through the eccentric bushing 4 design, isolates the inner cavity 11 into a horizontal U-shaped structure. After the liquid enters from the inlet flange pipe 2, it is dispersed to the upper and lower sides of the inner cavity 11, and finally enters the buffer cavity 9 from the multiple grid holes 6 at both ends. Then, under the conveying of the built-in screw, it enters the middle of the bushing 4 and is discharged from the outlet flange pipe 3.

[0029] The stator structure of this screw pump converts the single-sided liquid inlet at the end of bushing 4 into simultaneous liquid inlet from the upper and lower sides, thus diverting the liquid inlet. Multiple grid holes 6 are then used to disperse the fluid. The liquid flowing up and down counteracts each other, reducing the lateral movement speed of the fluid and decreasing the liquid velocity at the bushing 4 port. This creates a buffer, reduces the impact of lateral liquid flow on the liquid intake of the screw, and improves the liquid intake effect.

[0030] The outer shell 1 has end caps installed at both ends, and the buffer chamber 9 is the space between the end caps and the end plate 5. Liquid enters the buffer chamber 9 symmetrically from the upper and lower sides, and then enters the bushing 4 for transportation.

[0031] In this embodiment, to further provide a grid hole 6 structure, the grid hole 6 consists of multiple vertically arranged elongated holes, the inner ends of which are tangent to the outer wall of the bushing 4, and the outer ends of which are tangent to the inner wall of the outer shell 1. The width and number of the grid holes 6 are set as needed.

[0032] In this embodiment, a dividing plate 10 is fixedly fitted in the middle of the bushing 4. The outer side of the dividing plate 10 is fixed to the inner wall of the outer casing 1, and the dividing plate 10 is disposed at the central axial surface of the inlet flange pipe 2. With this arrangement, the liquid entering through the inlet flange pipe 2 is divided into two paths by the dividing plate, which enter the bushing 4 from both ends and transport the liquid from both ends to the middle, and then discharge it from the outlet flange pipe 3.

[0033] In this embodiment, a support column 7 is fixedly connected to the bottom of the outer casing 1, and mounting plates 8 are fixedly connected to the left and right sides of the bottom of the support column 7. The mounting plates 8 have multiple mounting holes. With this arrangement, bolts are passed through the mounting holes to fix the mounting plate 8 to the workbench.

[0034] In this embodiment, the support column 7 is a square tube column with a hollow interior. This design reduces material costs while providing stable support.

[0035] In this embodiment, a plurality of protrusions 12 are provided on the outer edges of both ends of the outer casing 1, and the protrusions 12 are provided with through holes. The outer sides of the protrusions 12 are aligned with the two end faces of the outer casing 1 and are used to install the end caps at both ends.

[0036] In this embodiment, the bushing 4 is a single-screw bushing or a twin-screw bushing. A single screw or twin screw is installed inside the single-screw bushing or twin-screw bushing, and both the single screw and twin screw are bidirectional screws.

[0037] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0039] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A screw pump stator structure, characterized in that, The screw pump stator structure includes a housing (1) and a bushing (4) disposed inside the housing (1). The bushing (4) has end plates (5) at both ends, and the periphery of the end plates (5) is fixed to the inner wall of the housing (1). The outer shell (1) has an inlet flange pipe (2) on one side and an outlet flange pipe (3) on the other side. The bushing (4) is located on the outer shell (1) and is biased towards the outlet flange pipe (3). The side of the bushing (4) facing the outlet flange pipe (3) is fixed to the inner wall of the outer shell (1). The outlet flange (3) is connected to the bushing (4), and the inlet flange (2) is connected to the inner cavity (11) formed between the outer shell (1) and the bushing (4). The upper and lower ends of the end plate (5) are symmetrically provided with a plurality of grid holes (6). The inner side of the grid holes (6) is connected to the inner cavity (11), and the outer side is connected to the buffer cavity (9) formed outside the end plate (5).

2. The screw pump stator structure according to claim 1, characterized in that, The grid holes (6) are multiple elongated holes arranged vertically. The inner end of the elongated holes is tangent to the outer wall of the bushing (4), and the outer end of the elongated holes is tangent to the inner wall of the outer shell (1).

3. The screw pump stator structure according to claim 1, characterized in that, A dividing plate (10) is fixedly sleeved in the middle of the bushing (4). The outer side of the dividing plate (10) is fixed to the inner wall of the outer shell (1). The dividing plate (10) is located on the central axis surface of the inlet flange pipe (2).

4. The screw pump stator structure according to claim 1, characterized in that, The bottom of the outer shell (1) is fixedly connected to a support column (7), and the left and right sides of the bottom of the support column (7) are fixedly connected to an mounting plate (8), which has multiple mounting holes.

5. The screw pump stator structure according to claim 4, characterized in that, The support column (7) is a square tube column, and the interior of the square tube column is a hollow structure.

6. The screw pump stator structure according to claim 1, characterized in that, The outer edges of both ends of the outer shell (1) are provided with a plurality of protrusions (12), and the protrusions (12) are provided with through holes.

7. The screw pump stator structure according to claim 1, characterized in that, The bushing (4) is a single-screw bushing or a double-screw bushing.

Images