Rotor swing type screw assembly and novel screw pump

Abstract

The utility model discloses a rotor swing type screw assembly and a novel screw pump, and belongs to the technical field of screw pumps. Wherein the screw rod assembly is composed of a fixed end universal joint, a universal swing shaft, a movable end universal joint, a screw rod, a spiral sleeve and the like, the fixed end universal joint is fixedly arranged, one end of the universal swing shaft is hinged to the fixed end universal joint, the other end of the universal swing shaft is hinged to the movable end universal joint, the screw rod is connected to the movable end universal joint, and the spiral sleeve is connected to the screw rod. The screw rod is externally engaged with a spiral sleeve and forms a plurality of accommodating cavities, the spiral sleeve performs radial circumferential rotation and drives the screw rod to perform eccentric circle swinging, and the spiral sleeve and the screw rod are matched to convey materials; the novel screw pump is composed of a rotor swing type screw assembly, a fixed support, a straight-through pipe, a motor shell, a stator coil, a permanent magnet rotor and the like. The swing type screw assembly is arranged in a cavity formed by the permanent magnet rotor, the straight-through pipe and the fixed support. The axial distance of the pump is shortened, and the pump is convenient to install.

Description

Technical Field

[0001] The utility model relates to a rotor swing type screw component, and also relates to a new type screw pump including the rotor swing type screw component, belonging to the technical field of screw pumps. Background Technique

[0002] Screw pumps are classified into single screw pumps, double screw pumps, triple screw pumps, etc. according to the number of screws. Among them, the single screw pump is a single screw type transport pump. The single screw pump belongs to the rotary displacement pump. It relies on the mutual meshing of the screw and the bushing to generate volume changes in the suction chamber and the discharge chamber to transport liquids. It is an internal meshing closed screw pump. The main working components are composed of a bushing (stator) with a double-headed spiral cavity and a single-headed spiral screw (rotor) meshing with it in the stator cavity. When the input shaft drives the rotor to make planetary rotation around the center of the stator through a universal joint, the stator-rotor pair continuously meshes to form a sealing cavity. These sealing cavities move axially at a constant speed with unchanged volume, and transport the conveyed medium from the suction end through the stator-rotor pair to the discharge end. Its greatest feature is its strong adaptability to media, stable flow rate, small pressure pulsation, and high self-priming ability. Its application range is extremely wide, and it is mainly applied to: shipbuilding industry, petroleum industry, construction industry, mining industry, chemical industry, etc.

[0003] The drive device of the screw pump is composed of multiple components such as an electric motor, a speed reducer, and a coupling. These components cooperate with each other to jointly ensure that the screw pump can operate normally and transport materials, which has an important impact on the performance and efficiency of the screw pump. In recent years, the direct drive of a screw pump by a low-speed high-torque permanent magnet synchronous motor has gradually been applied as a new technology, and the system transmission method has changed, eliminating the planetary gear reducer and its protector. Although the direct drive of a screw pump by a low-speed high-torque permanent magnet synchronous motor improves the system efficiency, it still adopts the split structure of the motor and the pump and the external connection transmission method. The overall size of the whole machine is still long, and the passability is poor, so the application is limited.

[0004] The Chinese invention patent application with the application number 202110427418.0 discloses a rotor built-in integrated all-metal screw pump oil production device. This invention improves the passability of the build-up section of horizontal wells with medium and short curvature radii by setting the machine and pump integrally to reduce the overall length of the unit, etc. However, its shell structure, internal component structure, etc. are relatively complex, and it is inconvenient to install, use, and maintain, with a high cost, and the structural layout needs to be further optimized. Summary of the Invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a rotor swing type screw component and a new type screw pump.

[0006] The technical solution adopted by the present utility model is as follows: A rotor swing type screw assembly is designed, which includes a fixed-end universal joint, a universal swing shaft, a movable-end universal joint, a screw rod and a spiral sleeve. The fixed-end universal joint is fixedly arranged. One end of the universal swing shaft is hinged to the fixed-end universal joint, and the other end is hinged to the movable-end universal joint. The screw rod is connected to the movable-end universal joint. The screw rod is externally meshed with the spiral sleeve and forms a plurality of cavities. The spiral sleeve makes a radial circular rotation and drives the screw rod to make an eccentric circular swing, and the two cooperate to convey materials.

[0007] Furthermore, this design also includes transmission pins. Both ends of the universal swing shaft are respectively connected to the fixed-end universal joint and the movable-end universal joint through transmission pins, and both ends of the universal swing shaft can swing in different directions relative to the fixed-end universal joint and the movable-end universal joint respectively.

[0008] The present utility model also provides a new type of screw pump, which includes the above-mentioned rotor swing type screw assembly, and also includes a fixed support, a straight-through pipe, a motor housing, a stator coil and a permanent magnet rotor. The two ends of the straight-through pipe are respectively fixedly installed with the fixed support and the motor housing. The stator coil and the permanent magnet rotor are installed in the motor housing. The stator coil is fixedly installed, and the permanent magnet rotor is rotatably installed. The spiral sleeve is fixedly installed inside the permanent magnet rotor. The stator coil is electrically connected to a power source. The permanent magnet rotor rotates under the action of the stator coil. The fixed-end universal joint is installed on the fixed support, and a diversion channel is provided on the fixed support.

[0009] Furthermore, the swing type screw assembly is arranged in the cavity formed by the permanent magnet rotor, the straight-through pipe and the fixed support, and the universal swing shaft is arranged in the straight-through pipe.

[0010] Furthermore, a plurality of diversion channels are circumferentially and arrayedly arranged on the fixed support.

[0011] Furthermore, a cylindrical through hole is provided in the middle of the motor housing for installing the permanent magnet rotor. A closed circumferential chamber relative to the permanent magnet rotor is also provided on the motor housing for installing the stator coil. The circumferential chamber surrounds the cylindrical through hole, and the two are coaxially arranged.

[0012] Furthermore, a boss is provided in the middle of the permanent magnet rotor, and bearings are respectively provided at both ends of the boss.

[0013] Furthermore, mechanical seals are respectively provided at both ends of the permanent magnet rotor, and the mechanical seals are arranged in the gap between the end of the permanent magnet rotor and the end of the motor housing.

[0014] Furthermore, this new type of screw pump also includes a discharge body and a liquid inlet. The liquid inlet is fixedly installed on the side of the fixed support away from the motor housing, and the discharge body is arranged on the side of the motor housing away from the fixed support.

[0015] Furthermore, both the discharge body and the inlet liquid are in a horn-shaped structure.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The screw pump of the present utility model can be realized through a fixed support, a straight-through pipe, a motor housing, a stator coil, a permanent magnet rotor, and a rotor swing type screw assembly. The structure of its housing and the structure of internal components are simplified, making installation, use, and maintenance convenient, reducing costs, and further optimizing the structural layout. The screw pump or the rotor swing type screw assembly of the present utility model reduces the overall length of the unit through an integrated machine-pump setting, shortens the axial distance of the pump, and is convenient for installation. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic cross-sectional view of the screw pump of the present utility model.

[0020] Figure 2 It is a schematic axonometric view of the screw pump of the present utility model.

[0021] In the figure: 1, fixed-end universal joint; 2, universal swing shaft; 3, movable-end universal joint; 4, screw; 5, spiral sleeve; 6, drive pin; 7, fixed support; 8, straight-through pipe; 9, motor housing; 10, stator coil; 11, permanent magnet rotor; 12, diversion channel; 13, boss; 14, bearing; 15, mechanical seal; 16, inlet liquid; 17, discharge body. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] Embodiment 1

[0025] As Figure 1 shown, a rotor swing type screw component includes a fixed-end universal joint 1, a universal swing shaft 2, a movable-end universal joint 3, a screw 4, and a spiral sleeve 5. The fixed-end universal joint 1 is fixedly arranged, that is, the fixed-end universal joint 1 is fixedly installed. One end of the universal swing shaft 2 is hinged to the fixed-end universal joint 1, and the other end is hinged to the movable-end universal joint 3. The screw 4 is connected to the movable-end universal joint 3. The screw 4 can swing through the universal swing shaft 2. The screw 4 is externally meshed with the spiral sleeve 5 and forms a plurality of cavities. The spiral sleeve 5 rotates in a radial circle and drives the screw 4 to swing in an eccentric circle. The two cooperate to convey materials. When conveying materials, a sealing cavity is formed by the mutual meshing of the screw 4 and the spiral sleeve 5. The rotation of the spiral sleeve 5 drives the change of the volume in the sealing cavity to generate a pressure difference, making the volume in the sealing cavity larger and the pressure smaller. With the continuous rotation of the spiral sleeve 5, the conveying of materials is realized. The rotor swing type screw component has a shorter axial distance, better passability, fewer application restrictions, and is convenient for installation and use.

[0026] The rotor swing type screw component described in this embodiment further includes a transmission pin 6. Both ends of the universal swing shaft 2 are respectively connected to the fixed-end universal joint 1 and the movable-end universal joint 3 through the transmission pin 6. Both ends of the universal swing shaft 2 can swing in different directions relative to the fixed-end universal joint 1 and the movable-end universal joint 3 respectively, and the structure is simple and easy to implement.

[0027] Embodiment 2

[0028] As Figure 1 and Figure 2As shown in the figure, this embodiment provides a new type of screw pump, which includes the rotor swing type screw assembly described in Embodiment 1. It further includes a fixed support 7, a straight pipe 8, a motor housing 9, a stator coil 10 and a permanent magnet rotor 11. The two ends of the straight pipe 8 are respectively fixedly installed with the fixed support 7 and the motor housing 9. The stator coil 10 and the permanent magnet rotor 11 are installed in the motor housing 9. The stator coil 10 is fixedly installed, and the permanent magnet rotor 11 is rotatably installed. A spiral sleeve 5 is fixedly installed inside the permanent magnet rotor 11. The stator coil 10 is electrically connected to a power supply (not shown in the drawings). The permanent magnet rotor 11 rotates under the action of the stator coil 10. The fixed end universal joint 1 is installed on the fixed support 7. A diversion channel 12 is provided on the fixed support 7, and the diversion channel 12 is used for the passage of materials during material transportation.

[0029] In this embodiment, the swing type screw assembly is arranged in the cavity formed by the permanent magnet rotor 11, the straight pipe 8 and the fixed support 7. The axial distance of the pump is shortened, which is convenient for installation and use. The universal swing shaft 2 is arranged in the straight pipe 8.

[0030] In this embodiment, a plurality of diversion channels 12 are circumferentially arrayed on the fixed support 7, and the diversion channels 12 can be through holes provided on the fixed support 7.

[0031] Embodiment 3

[0032] This embodiment further optimizes and refines the structure of the new type of screw pump on the basis of Embodiment 2, specifically:

[0033] In the new type of screw pump described in this embodiment, a cylindrical through hole is provided in the middle of the motor housing 9 for installing the permanent magnet rotor 11. A closed circumferential chamber relative to the permanent magnet rotor is also provided on the motor housing 9 for installing the stator coil 10. The circumferential chamber surrounds the cylindrical through hole and the two are coaxially arranged, and the structure is stable and reliable. Flange plates also extend from both ends of the motor housing 9 for fixedly installing the straight pipe 8 and the like.

[0034] Embodiment 4

[0035] This embodiment further optimizes and refines the structure of the permanent magnet rotor 11 on the basis of Embodiment 3, specifically:

[0036] A boss 13 is provided in the middle of the permanent magnet rotor 11, specifically, a layer of annular protrusion is provided in the middle of the permanent magnet rotor 11. Bearings 14 are respectively provided at both ends of the boss 13, which is convenient for the limit and rotation of the permanent magnet rotor 11.

[0037] In this embodiment, mechanical seals 15 are respectively provided at both ends of the permanent magnet rotor 11. The mechanical seals 15 are arranged in the gap between the end of the permanent magnet rotor 11 and the end of the motor housing 9. The mechanical seals 15 can adopt conventional existing technologies.

[0038] Example 5

[0039] This embodiment is a further optimization and refinement of the structure of the new screw pump based on Embodiment 4, specifically:

[0040] For the new screw pump described in this embodiment, it further includes a discharge body 17 and a liquid inlet 16. The liquid inlet 16 is fixedly installed on the side of the fixed support 7 away from the motor housing 9, and the discharge body 17 is arranged on the side of the motor housing 9 away from the fixed support 7.

[0041] In this embodiment, both the discharge body 17 and the liquid inlet 16 are in a flared shape, and flange plates are respectively arranged at their outer ends for connecting other structural devices.

[0042] When using the present utility model, the medium enters through the liquid inlet 16, enters the pump chamber through the diversion channels 12 around the fixed support 7, and is transported to the discharge body 17 and discharged by the relative movement work of the spiral sleeve 5 and the screw 4.

[0043] In addition, in the description of the present utility model, unless otherwise specified, if the terms "a plurality of", "multiple roots", "multiple groups" are used, their meanings are two or more, and the meanings of "several", "several roots", "several groups" are one or more. In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, if the terms "first", "second", "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] The specific implementation manners of the present utility model have been described in detail above in conjunction with the drawings. However, the present utility model is not limited to the above implementation manners. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present utility model.

Claims

1. A rotor-swinging screw assembly, characterized in that: It includes a fixed-end universal joint, a universal swing shaft, a movable-end universal joint, a screw rod and a spiral sleeve. The fixed-end universal joint is fixedly arranged. One end of the universal swing shaft is hinged to the fixed-end universal joint, and the other end is hinged to the movable-end universal joint. The screw rod is connected to the movable-end universal joint. The screw rod is externally engaged with the spiral sleeve and forms a plurality of cavities. The spiral sleeve makes a radial circular rotation and drives the screw rod to make an eccentric circular swing, and the two cooperate to convey materials.

2. The rotor swing type screw assembly according to claim 1, characterized in that: It further includes a transmission pin. Both ends of the universal swing shaft are respectively connected to the fixed-end universal joint and the movable-end universal joint through the transmission pin. Both ends of the universal swing shaft can swing in different directions relative to the fixed-end universal joint and the movable-end universal joint respectively.

3. A new type of screw pump, characterized in that: It includes the rotor swing type screw rod assembly described in claim 2, and further includes a fixed support, a straight-through pipe, a motor housing, a stator coil and a permanent magnet rotor. The two ends of the straight-through pipe are respectively fixedly installed with the fixed support and the motor housing. The stator coil and the permanent magnet rotor are installed in the motor housing. The stator coil is fixedly installed, and the permanent magnet rotor is rotatably installed. The spiral sleeve is fixedly installed in the permanent magnet rotor. The stator coil is electrically connected to a power source. The permanent magnet rotor rotates under the action of the stator coil. The fixed-end universal joint is installed on the fixed support, and a diversion channel is arranged on the fixed support.

4. The novel screw pump according to claim 3, characterized in that: The swing type screw rod assembly is arranged in the cavity formed by the permanent magnet rotor, the straight-through pipe and the fixed support, and the universal swing shaft is arranged in the straight-through pipe.

5. The novel screw pump according to claim 4, characterized in that: A plurality of diversion channels are circumferentially arranged in an array on the fixed support.

6. The novel screw pump according to any one of claims 3-5, characterized in that: A cylindrical through hole is arranged in the middle of the motor housing for installing the permanent magnet rotor. A closed circumferential chamber relative to the permanent magnet rotor is also arranged on the motor housing for installing the stator coil. The circumferential chamber surrounds the cylindrical through hole, and the two are coaxially arranged.

7. The novel screw pump according to claim 6, characterized in that: A boss is arranged in the middle of the permanent magnet rotor, and bearings are respectively arranged at both ends of the boss.

8. The novel screw pump according to claim 7, characterized in that: Mechanical seals are also respectively arranged at both ends of the permanent magnet rotor, and the mechanical seals are arranged in the gap between the end of the permanent magnet rotor and the end of the motor housing.

9. The novel screw pump according to claim 8, characterized in that: It further includes a discharge body and a liquid inlet. The liquid inlet is fixedly installed on the side of the fixed support away from the motor housing, and the discharge body is arranged on the side of the motor housing away from the fixed support.

10. The novel screw pump according to claim 9, wherein: Both the discharge body and the liquid inlet are in a flared structure.

Images