Driving assembly for screw pump

Abstract

The utility model discloses a driving assembly for a screw pump, and belongs to the technical field of screw pump corollary equipment. Comprising a motor, a transmission assembly and a rotating device, the rotating device is connected with a screw pump and can rotate to drive the screw pump to work, the screw pump is composed of a rotor and a stator which are spirally meshed, the motor is arranged on one side of the screw pump, the motor and the screw pump are arranged in parallel, and the motor is connected with the rotating device through the transmission assembly. The transmission assembly is one of belt transmission, chain transmission, gear transmission and worm and gear transmission. Medium flows in the axial direction of the screw pump. The utility model has the advantages of simple structure, convenience in use, low cost and short axial distance, and is more favorable for the use of the screw pump.

Description

Technical Field

[0001] The utility model relates to a driving component, in particular to a driving component for a screw pump, belonging to the technical field of screw pump supporting equipment. Background Art

[0002] A screw pump is a rotary pump that relies on the change in the meshing space volume formed by the pump body and the screw and the movement to transport or pressurize liquids. Screw pumps are classified into single-screw pumps, double-screw pumps, and triple-screw pumps according to the number of screws. Its working principle is that when the motor drives the pump shaft to rotate, the screw rotates around its own axis on the one hand, and on the other hand, it rolls along the inner surface of the bushing, thus forming the sealing chamber of the pump. For each revolution of the screw, the liquid in the sealing chamber advances one pitch forward. With the continuous rotation of the screw, the liquid is pressed from one sealing chamber to another in a spiral manner and finally extruded from the pump body. Screw pumps have the advantages of simple structure, safe and reliable operation, convenient use and maintenance, continuous and uniform liquid output, etc., so they are widely used in the market.

[0003] Among them, single-screw pumps have a series of advantages such as strong adaptability to media, stable flow rate, small pressure pulsation, and high self-priming ability, and are widely used in industries such as environmental protection, shipbuilding industry, petroleum industry, medicine, daily chemical industry, brewing industry, construction industry, mining industry, chemical industry, printing, and paper industry. In these application fields, sometimes due to installation space limitations, in order to meet the on-site use requirements, there are certain limitations on the installation position of the single-screw pump. Traditional single-screw pumps are directly connected to the rotor for driving by using motors, couplings, transmission shafts, universal joints, etc., resulting in a long structure and a large number of components, and being greatly restricted by the installation space. The Chinese utility model patent with the application number 2016203504137 discloses a U-shaped drive structure for a single-screw pump, the Chinese utility model patent with the application number 202322747594X discloses a screw pump device, and the attached Figure 3 existing belt-driven reduction method pumps mentioned in the Chinese utility model patent with the application number 2023230117517 all objectively reduce the length of the single-screw pump and solve the problem of limited installation space to a certain extent, but the structure of the screw pump is still relatively complex. Due to the limitation of the transmission direction by the driving device, it is necessary to add an inhalation chamber part between the rotor driving structure and the stator (bushing). The addition of the inhalation chamber will inevitably increase the total length of the pump body. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a driving component for a screw pump.

[0005] The technical solution adopted by the present utility model is as follows: A driving assembly for a screw pump is designed to drive the screw pump to work for medium transportation. It includes a motor, a transmission assembly, and a rotating device. The rotating device is connected to the screw pump and can rotate to drive the screw pump to work. The screw pump is composed of a rotor and a stator that are helically meshed. The motor is arranged on one side of the screw pump, and the two are arranged in parallel. The motor is connected to the rotating device through the transmission assembly. The transmission assembly is one of belt drive, chain drive, gear drive, and worm and worm wheel drive. The medium flows axially along the screw pump.

[0006] Further, a spiral through groove is arranged in the stator, the rotor is a spiral rod, and the rotating device is connected to the rotor of the screw pump to drive the rotor to rotate.

[0007] Further, the rotating device is arranged at one axial end of the screw pump. It includes a flow-through barrel and a universal joint. The flow-through barrel is rotatably arranged, and the universal joint is arranged in the flow-through barrel. One end of the universal joint is fixed in the flow-through barrel, and the other end is connected to the rotor and can swing in all directions. The transmission assembly is connected to the flow-through barrel and drives the flow-through barrel to rotate. The flow-through barrel is communicated with the spiral through groove in the stator. The medium enters from one end of the rotating device and flows linearly, and is discharged from the end of the screw pump far from the rotating device.

[0008] Further, the rotating device further includes bearing seats respectively arranged at both ends of the flow-through barrel and first rotating seats and second rotating seats respectively arranged at both ends of the flow-through barrel. The universal joint is installed on the first rotating seat. A rotating bearing is installed in the bearing seat. The first rotating seat and the second rotating seat are respectively installed in the corresponding rotating bearings. Axially through flow channels are respectively arranged on the first rotating seat and the second rotating seat.

[0009] Further, a base is arranged below the bearing seat, the bearing seat is fixed on the base, and the first rotating seat and the second rotating seat are respectively fixed at both ends of the flow-through barrel.

[0010] Further, the transmission assembly is a belt drive, which includes a transmission belt, a large belt pulley, and a small belt pulley. The large belt pulley is arranged on the flow-through barrel, the small belt pulley is arranged at the output end of the motor, and the transmission belt is connected between the large belt pulley and the small belt pulley.

[0011] Furthermore, this design also includes a connecting sleeve. An installation seat is arranged at one end of the stator close to the rotating device, and a feed end is arranged at the end of the rotating device far from the screw pump. The installation seat and the feed end are respectively installed on the corresponding bearing seats. Connecting sleeves are respectively arranged in the bearing seats between the installation seat and the second rotating seat and between the first rotating seat and the feed end. A mechanical seal is also arranged outside the connecting sleeve.

[0012] Furthermore, the flow channels on the first rotating seat are a plurality of through holes circumferentially arrayed thereon, and the flow channel on the second rotating seat is a round hole provided in the middle thereof.

[0013] Furthermore, a pull rod is provided between the two bearing seats. The four corners of the bearing seats are respectively provided with pull rods, and both ends of the pull rods are locked by two nuts respectively.

[0014] Furthermore, the universal joint includes a universal swing shaft and connecting heads provided at both ends of the universal swing shaft. The connecting heads and the universal swing shaft are connected by pins. Both ends of the universal swing shaft can rotate in different directions along the connection points respectively. The ends of the connecting heads at both ends of the universal swing shaft away from the universal swing shaft are fixedly connected to the first rotating seat and the rotor respectively.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] By adopting the method of transporting the medium along the axial direction of the screw pump, the structure of the screw pump is greatly simplified and shortened. There is no need to set up traditional drive shafts, speed reducers, couplings and other structures, nor to set up a separate suction chamber cavity structure, and the motor is arranged parallel to one side of the screw pump, which greatly overcomes the problem of limited installation space.

[0017] The drive assembly of the present utility model is particularly suitable for screw pumps used on the ground, with high mechanical transmission efficiency, significantly improving the working efficiency, eliminating the potential problems of lubrication and high-temperature generation in the gearbox, and having a reasonable overall design, simple structure and reduced cost. BRIEF 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, other drawings can be obtained based on these drawings without creative efforts.

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

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

[0021] Figure 3 It is a schematic top view of the present utility model after being connected to the screw pump.

[0022] In the figure: 1. Motor; 2. Rotor; 3. Stator; 4. Overcurrent barrel; 5. Universal joint; 6. Bearing seat; 7. First rotating seat; 8. Second rotating seat; 9. Rotating bearing; 10. Base; 11. Transmission belt; 12. Large pulley; 13. Small pulley; 14. Connecting sleeve; 15. Mounting seat; 16. Feeding end; 17. Mechanical seal; 18. Tie rod; 19. Discharge body. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, 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 shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, if the terms "installation", "connection" and "coupling" are used, they 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 directly connected or indirectly connected 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.

[0025] Embodiment 1

[0026] As Figures 1 - 3 shown, a driving assembly for a screw pump is used to drive the screw pump to work for medium transportation. Its structural composition includes a motor 1, a transmission assembly and a rotating device. The rotating device is connected to the screw pump and can rotate to drive the screw pump to work, so as to transport the medium. The screw pump is composed of a rotor 2 and a stator 3 that are helically meshed. The motor 1 is arranged on one side of the screw pump, and the two are arranged in parallel. The motor 1 is connected to the rotating device through the transmission assembly, so that the rotating device is driven to rotate by the motor 1, and then the screw pump is controlled to work. The transmission assembly is one of belt drive, chain drive, gear drive and worm and worm gear drive, reducing the setting of structures such as traditional transmission shafts, couplings, and speed reducers, shortening the length of the screw pump. The medium flows along the axial direction of the screw pump, eliminating the separately arranged suction chamber part (the traditional suction chamber becomes a part of the transmission structure), further shortening the length of the screw pump to be applicable to more diverse installation and use sites.

[0027] Embodiment 2

[0028] This embodiment further optimizes and refines the connection between the driving component and the screw pump on the basis of Embodiment 1. Specifically, a spiral through groove is provided in the stator 3 (bushing), and the rotor 2 is a spiral rod, that is, this screw pump has the structure of a conventional screw pump in the ordinary sense. The rotating device is connected to the rotor 2 of the screw pump to drive the rotor 2 to rotate, with stable structure, reliable and durable performance.

[0029] It can be understood that in this embodiment, the stator 3 with a spiral through groove can also be set as a rotating structure, and the rotating device is connected to the stator 3 of the screw pump to drive the stator 3 to rotate. The rotation of the stator 3 drives the spiral rod therein to work for medium transportation. At this time, the original stator 3 with a spiral through groove becomes the rotor 2, and the original spiral rod rotor 2 becomes the stator 3.

[0030] Embodiment 3

[0031] This embodiment further optimizes and refines the structure of the rotating device on the basis of Embodiment 2. Specifically:

[0032] The rotating device is arranged at one axial end of the screw pump and includes a flow-through barrel 4 (equivalent to the suction chamber in a conventional screw pump, which has become a part of the rotating device in this application) and a universal joint 5 (which can be the universal joint 5 structure in a conventional screw pump). The flow-through barrel 4 is rotatably arranged, that is, the flow-through barrel 4 is a rotatable structure. The universal joint 5 is arranged in the flow-through barrel 4. One end of the universal joint 5 is fixed in the flow-through barrel 4, and the other end is connected to the rotor 2 and can swing in all directions. The transmission component is connected to the flow-through barrel 4 and drives the flow-through barrel 4 to rotate, thereby driving the universal joint 5 therein to rotate, and further controlling the screw pump to work for medium transportation. The flow-through barrel 4 communicates with the spiral through groove in the stator 3. The medium enters from one end of the rotating device and flows linearly, and is discharged from the end of the screw pump far from the rotating device, so that the medium realizes axial flow to shorten the length of the entire device.

[0033] Embodiment 4

[0034] This embodiment further optimizes and refines the structure of the rotating device on the basis of Embodiment 3. Specifically:

[0035] The rotating device further includes bearing seats 6 respectively arranged at both ends of the overflow barrel 4, and a first rotating seat 7 and a second rotating seat 8 respectively arranged at both ends of the overflow barrel 4. The transmission component drives the overflow barrel 4 to rotate, and the rotation of the overflow barrel 4 drives the first rotating seat 7 and the second rotating seat 8 to rotate together. The universal joint 5 is installed on the first rotating seat 7, extends out of the overflow barrel 4 and the second rotating seat 8, and is connected to the rotor 2. A rotating bearing 9 is installed in the bearing seat 6, and the first rotating seat 7 and the second rotating seat 8 are respectively installed in the corresponding rotating bearings 9, so that the rotation is more stable. Axially penetrating flow channels are respectively arranged on the first rotating seat 7 and the second rotating seat 8 to facilitate the axial flow of the medium.

[0036] In this embodiment, a base 10 (installation support structure) is arranged below the bearing seat 6, and the bearing seat 6 is fixed on the base 10, providing support and a platform for the installation of the overflow barrel 4 and the like. The first rotating seat 7 and the second rotating seat 8 are respectively fixed at both ends of the overflow barrel 4 to form an integrated structure, which is convenient for rotation.

[0037] Embodiment 5

[0038] This embodiment further optimizes and refines the structure of the transmission component on the basis of Embodiment 4, specifically:

[0039] The transmission component is a belt drive, which includes a transmission belt 11, a large pulley 12 and a small pulley 13. The large pulley 12 is arranged on the overflow barrel 4, the small pulley 13 is arranged at the output end of the motor 1, and the transmission belt 11 is connected between the large pulley 12 and the small pulley 13; the belt drive has a simple structure, stable transmission, can buffer and absorb vibration, and its cost is low, does not require lubrication, and is easy to maintain.

[0040] Embodiment 6

[0041] This embodiment further optimizes and refines the structure of the drive component on the basis of Embodiment 5, specifically:

[0042] The drive component of the screw pump described in this embodiment further includes an adapter sleeve 14. One end of the stator 3 close to the rotating device is provided with a mounting seat 15, and the other end is provided with a discharge body 19. One end of the rotating device far from the screw pump is provided with a feed end 16 (feed body, with a medium channel arranged in the middle). The mounting seat 15 and the feed end 16 are respectively installed on the corresponding bearing seats 6. Between the mounting seat 15 and the second rotating seat 8,

[0043] Adapter sleeves 14 are respectively arranged in the bearing seats 6 between the first rotating seat 7 and the feed end 16. A mechanical seal 17 is also arranged outside the adapter sleeve 14. To ensure the sealing of the whole structure.

[0044] Embodiment 7

[0045] This embodiment is a further optimization and refinement of the rotating seat structure based on Embodiment 6, specifically as follows:

[0046] The flow channels on the first rotating seat 7 are multiple through holes circumferentially arrayed thereon. The universal joint 5 is fixed to the middle of the first rotating seat 7. The flow channel on the second rotating seat 8 is a round hole provided in the middle thereof, and the universal joint 5 passes through this round hole.

[0047] Embodiment 8

[0048] This embodiment is a further optimization and refinement of the rotating device structure based on Embodiment 7, specifically as follows:

[0049] A pull rod 18 is provided between the two bearing seats 6. The pull rods 18 are respectively arranged at the four corners of the bearing seat 6. Both ends of the pull rod 18 are locked by two nuts (not shown in the drawings), specifically, a nut is threadedly connected to each side of the bearing seat 6 at the connection between the pull rod 18 and the bearing seat 6. The pull rod 18 is used to lock and adjust the bearing tightness, and conventional existing technical means can be adopted.

[0050] In this embodiment, the universal joint 5 includes a universal swing shaft and connection heads arranged at both ends of the universal swing shaft. The connection heads and the universal swing shaft are connected by pins. Both ends of the universal swing shaft can respectively rotate in different directions (up and down rotation and left and right rotation) along the connection with the connection heads. The connection heads at both ends of the universal swing shaft are fixedly connected to the first rotating seat 7 and the rotor 2 respectively at the ends away from the universal swing shaft.

[0051] When using the present utility model, one end of the screw pump is installed on the driving device, and the other end is fixed on the base 10. The motor 1 is started, and the medium flows axially along the feed end 16, the first rotating seat 7, the overflow barrel 4, the second rotating seat 8 and the screw pump, so as to continuously transport.

[0052] In addition, in the description of the present utility model, unless otherwise specified, if the terms "multiple", "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.

[0053] The specific embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A driving assembly for a screw pump, which is used to drive the screw pump to work for medium transportation, and is characterized in that: It includes a motor, a transmission assembly and a rotating device. The rotating device is connected to the screw pump and can rotate to drive the screw pump to work. The screw pump is composed of a rotor and a stator that are helically meshed. The motor is arranged on one side of the screw pump, and the two are arranged in parallel. The motor is connected to the rotating device through the transmission assembly. The transmission assembly is one of belt drive, chain drive, gear drive and worm and worm gear drive. The medium flows axially along the screw pump.

2. The drive assembly for a screw pump according to claim 1, wherein: A spiral through groove is arranged in the stator. The rotor is a spiral rod. The rotating device is connected to the rotor of the screw pump to drive the rotor to rotate.

3. The drive assembly for a screw pump according to claim 2, wherein: The rotating device is arranged at one axial end of the screw pump. It includes a flow-through barrel and a universal joint. The flow-through barrel is rotatably arranged. The universal joint is arranged in the flow-through barrel. One end of the universal joint is fixed in the flow-through barrel, and the other end is connected to the rotor and can swing in all directions. The transmission assembly is connected to the flow-through barrel and drives the flow-through barrel to rotate. The flow-through barrel is communicated with the spiral through groove in the stator. The medium enters from one end of the rotating device and flows linearly, and is discharged from the end of the screw pump far from the rotating device.

4. The drive assembly for a screw pump according to claim 3, characterized in that: The rotating device further includes bearing seats respectively arranged at both ends of the flow-through barrel and first rotating seats and second rotating seats respectively arranged at both ends of the flow-through barrel. The universal joint is installed on the first rotating seat. A rotating bearing is installed in the bearing seat. The first rotating seat and the second rotating seat are respectively installed in the corresponding rotating bearings. Axially penetrating flow channels are respectively arranged on the first rotating seat and the second rotating seat.

5. The drive assembly for a screw pump according to claim 4, characterized in that: A base is arranged below the bearing seat. The bearing seat is fixed on the base. The first rotating seat and the second rotating seat are respectively fixed at both ends of the flow-through barrel.

6. The drive assembly for a screw pump according to claim 5, characterized in that: The transmission assembly is a belt drive, which includes a transmission belt, a large belt pulley and a small belt pulley. The large belt pulley is arranged on the flow-through barrel. The small belt pulley is arranged at the output end of the motor. The transmission belt is connected between the large belt pulley and the small belt pulley.

7. The drive assembly for a screw pump according to claim 6, characterized in that: It further includes an adapter sleeve. An installation seat is arranged at one end of the stator close to the rotating device. A feed end is arranged at the end of the rotating device far from the screw pump. The installation seat and the feed end are respectively installed on the corresponding bearing seats. Adapter sleeves are respectively arranged in the bearing seats between the installation seat and the second rotating seat and between the first rotating seat and the feed end. A mechanical seal is also arranged outside the adapter sleeve.

8. The drive assembly for a screw pump according to claim 7, wherein: The flow channel on the first rotating seat is a plurality of through holes circumferentially arranged on it. The flow channel on the second rotating seat is a circular hole arranged in the middle of it.

9. The drive assembly for a screw pump according to any one of claims 4-8, characterized in that: A pull rod is arranged between the two bearing seats. Pull rods are respectively arranged at the four corners of the bearing seat. Both ends of the pull rod are locked by two nuts respectively.

10. The drive assembly for a screw pump according to claim 9, characterized in that: The universal joint includes a universal swing shaft and connecting heads arranged at both ends of the universal swing shaft. The connecting heads are connected to the universal swing shaft through pins. Both ends of the universal swing shaft can rotate in different directions along the connection points. The connecting heads at both ends of the universal swing shaft are respectively fixedly connected to the first rotating seat and the rotor at the ends far from the universal swing shaft.

Images