A straight-through single screw pump

Abstract

This invention discloses a straight-through single screw pump, comprising a base and a stator. A helical rotor is installed inside the stator. A rotary drive mechanism is installed on the base, and a reciprocating transmission mechanism connects the rotary drive mechanism and the helical rotor. The reciprocating transmission mechanism includes a pin seat connected to the rotary drive mechanism, a drive pin fixedly installed on the pin seat, a sliding sleeve seat rotatably installed on the drive pin, the sliding sleeve seat sliding along the drive pin, a short pin installed on the sliding sleeve seat, and a connector rotatably installed on the short pin. The helical rotor is connected to the connector. During the rotation of the helical rotor relative to the stator, the central axis of the helical rotor is always kept parallel to the central axis of the stator, thereby avoiding tilting tendencies, making the entire single screw pump operation more stable, effectively reducing operating noise, and avoiding the risk of pump chamber damage.

Description

Technical Field

[0001] This invention relates to the field of screw pump technology, and more particularly to a straight-through single screw pump. Background Technology

[0002] The rotor drive of a single screw pump generally adopts a universal joint structure, that is, the drive shaft and the drive end of the rotor are both connected to universal joints, and the universal joints at both ends are connected by an intermediate connecting rod. When the drive device is running, the rotational power is transmitted to the rotor through the universal joints and the intermediate connecting rod. The rotor has a tendency to deflect, that is, the rotor centerline tends not to be parallel to the stator centerline. If the stator rubber wears, this tendency will become more obvious or may actually occur, causing the conveyed medium to be unstable, producing abnormal noise, and even damaging the pump chamber. Summary of the Invention

[0003] (a) Technical issues

[0004] The purpose of this invention is to provide a straight-through single screw pump that solves the problem that the existing technology, which uses universal joints and intermediate connecting rods to transmit power to the rotor, causes the rotor centerline and stator centerline to tend to be non-parallel.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A straight-through single screw pump includes a base and a stator. A helical rotor is installed inside the stator. A rotary drive mechanism is installed on the base. A reciprocating transmission mechanism is connected between the rotary drive mechanism and the helical rotor. The reciprocating transmission mechanism includes a pin seat connected to the rotary drive mechanism. A drive pin is fixedly installed on the pin seat. A sliding sleeve seat is rotatably installed on the drive pin. The sliding sleeve seat can slide along the drive pin. A short pin is installed on the sliding sleeve seat. A connector is rotatably installed on the short pin. The helical rotor is connected to the connector.

[0008] Preferably, a sliding bearing is provided between the sliding sleeve seat and the transmission pin, and a sliding bearing is provided between the connector and the short pin.

[0009] Preferably, the rotary drive mechanism includes a drive seat mounted on a base and a rotating cylinder rotatably mounted inside the drive seat. A bevel gear is fixedly mounted on the rotating cylinder. A drive motor is mounted on the drive seat. The drive shaft of the drive motor is connected to a bevel gear via a coupling. The bevel gear meshes with the bevel gear. The rotating cylinder is fastened to the pin seat.

[0010] Preferably, a connecting shell is installed on the drive base and sleeved on the outside of the reciprocating transmission mechanism. A first mounting seat is installed at the end of the connecting shell, and a second mounting seat is installed on the base. The stator is installed between the first mounting seat and the second mounting seat. Multiple connecting rods located on the outside of the stator and evenly distributed circumferentially are also connected between the first mounting seat and the second mounting seat.

[0011] Preferably, the connecting shell has an observation window.

[0012] Preferably, a mechanical seal structure is installed between the pin seat and the first mounting seat.

[0013] Preferably, a medium inflow pipe is installed on the drive base, and a mechanical seal structure is provided between the rotating cylinder and the medium inflow pipe.

[0014] Preferably, the second mounting base is equipped with a medium outflow pipe that communicates with the stator.

[0015] Preferably, both the medium inflow pipe and the medium outflow pipe are provided with flange connection structures.

[0016] (III) Beneficial Effects

[0017] When the rotary drive mechanism drives the pin seat to rotate, the rotational power is transmitted to the screw rotor through the pin seat, drive pin, sliding sleeve, short pin, and connector, causing the screw rotor to rotate relative to the stator. Due to the interaction between the screw rotor and the stator, the screw rotor will float relative to the stator. The sliding sleeve is rotatably connected to the drive pin, allowing the sliding sleeve to slide relative to the drive pin. Thus, during the rotation of the screw rotor relative to the stator, the central axis of the screw rotor is always kept parallel to the central axis of the stator, thereby avoiding the tendency to tilt. This makes the entire single screw pump operation more stable, effectively reduces operating noise, and avoids the risk of pump chamber damage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the diagram;

[0021] Figure 4 This is a schematic diagram of the assembled structure of the sliding sleeve in this invention;

[0022] exist Figures 1 to 4 In the diagram, the correspondence between component names or lines and the drawing numbers is as follows:

[0023] 1. Base; 2. Stator; 3. Helical rotor; 4. Rotary drive mechanism; 41. Drive seat; 42. Rotating cylinder; 43. Bevel gear; 44. Drive motor; 45. Bevel gear; 46. Coupling; 5. Reciprocating transmission mechanism; 51. Pin seat; 52. Transmission pin; 53. Sliding sleeve seat; 54. Short pin; 55. Connector; 56. Sliding bearing; 6. Connecting shell; 7. First mounting seat; 8. Second mounting seat; 9. Connecting rod; 10. Observation window; 11. Mechanical seal structure; 12. Medium inlet pipe; 13. Medium outlet pipe. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] See Figures 1-4 As shown, an embodiment of the present invention proposes a straight-through single screw pump. The operating principle of the screw pump is the same as that of existing pumps, which is to transport media. Specifically, it includes a base 1 and a stator 2. A helical rotor 3 is installed inside the stator 2. A rotary drive mechanism 4 is installed on the base 1. A reciprocating transmission mechanism 5 is connected between the rotary drive mechanism 4 and the helical rotor 3. The rotary drive mechanism 4 transmits the rotational motion to the helical rotor 3 through the reciprocating transmission mechanism 5, so that the helical rotor 3 rotates relative to the stator 2. During the relative rotation, the helical rotor 3 will move relative to the stator 2, and at the same time, the axis will be translated. During the operation, the reciprocating transmission mechanism 5 keeps the central axis of the helical rotor 3 parallel to the central axis of the stator 2, thereby reducing the tendency to tilt, reducing noise during operation, and avoiding the risk of damage to the internal pump chamber.

[0026] Specifically, the reciprocating transmission mechanism 5 includes a pin seat 51 connected to the rotary drive mechanism 4. A transmission pin 52 is fixedly mounted on the pin seat 51, and a sliding sleeve seat 53 is rotatably mounted on the transmission pin 52. The sliding sleeve seat 53 can slide along the transmission pin 52. A short pin 54 is mounted on the sliding sleeve seat 53, and a connector 55 is rotatably mounted on the short pin 54. The helical rotor 3 is connected to the connector 55. The pin seat 51 transmits the rotational force of the rotary drive mechanism 4 to the helical rotor 3 through the transmission pin 52, the sliding sleeve seat 53, the short pin 54, and the connector 55. During the process, the rotational engagement of the helical rotor 3 and the stator 2 drives the helical rotor 3 to translate. Since the sliding sleeve 53 can slide relative to the transmission pin 52, and the sliding sleeve 53 and the transmission pin 52 are in rotational engagement, and the connector 55 and the short pin 54 are in rotational engagement, the helical rotor 3, along with the connector 55, the short pin 54, and the sliding sleeve 53, translates synchronously along the transmission pin 52. Throughout the process, the central axis of the helical rotor 3 remains parallel to the central axis of the stator 2, avoiding any tendency to tilt, making the entire pump more stable during operation and reducing operating noise.

[0027] Specifically, a sliding bearing 56 is provided between the sliding sleeve seat 53 and the transmission pin 52, and a sliding bearing 56 is provided between the connector 55 and the short pin 54. Thus, when the helical rotor 3 is subjected to a reverse force, the central axis of the helical rotor 3 can be kept to move in parallel.

[0028] The rotary drive mechanism 4 primarily transmits rotational power to the helical rotor 3. The rotary drive mechanism 4 includes a drive base 41 mounted on the base 1 and a rotating cylinder 42 rotatably mounted within the drive base 41. The rotating cylinder 42 is mounted on the drive base 41 via bearings, ensuring stable rotation. A bevel gear 43 is fixedly mounted on the rotating cylinder 42. Simultaneously, a drive motor 44 is mounted on the drive base 41. The drive shaft of the drive motor 44 is connected to a bevel gear 45 via a coupling 46. The bevel gear 45 meshes with the bevel gear 43. Driven by the drive motor 44 and coupling 46, the bevel gear 45 rotates, and under the cooperation of the bevel gear 45 and bevel gear 43, the rotating cylinder 42 rotates, achieving a 90° reversal of the rotation axis. This allows for the integration of the rotary drive mechanism 4 within a relatively small space. The rotating cylinder 42 is securely connected to the pin seat 51, so that the pin seat 51 rotates synchronously with the rotating cylinder 42.

[0029] Specifically, the stator 2 needs to be stably positioned and integrated on the base 1. A connecting shell 6 is installed on the drive seat 41 and sleeved on the outside of the reciprocating transmission mechanism 5. A first mounting seat 7 is installed at the end of the connecting shell 6. A second mounting seat 8 is installed on the base 1. The stator 2 is installed between the first mounting seat 7 and the second mounting seat 8. Multiple connecting rods 9 located on the outside of the stator 2 and evenly distributed circumferentially are also connected between the first mounting seat 7 and the second mounting seat 8. The stator 2 is installed through the first mounting seat 7 and the second mounting seat 8, and the stator 2 is reliably positioned through the multiple connecting rods 9. Specifically, the ends of the connecting rods 9 are connected to nuts. The nuts are used to lock the first mounting seat 7 and the second mounting seat 8 to ensure that the stator 2 is stably installed on the base 1. Furthermore, the drive seat 41 is used to connect and integrate the stator 2 within a small space.

[0030] Specifically, an observation window 10 is provided on the connecting shell 6, through which the rotation of the internal pin seat 51 can be observed.

[0031] To ensure sealing during rotation, a mechanical seal structure 11 is installed between the pin seat 51 and the first mounting seat 7. Since the pin seat 51 rotates relative to the first mounting seat 7, and the medium flowing through the pin seat 51 flows directly into the stator 2, it is necessary to seal the contact area between the pin seat 51 and the first mounting seat 7, and ensure that the pin seat 51 can rotate. The mechanical seal structure 11 achieves sealing while maintaining rotation, and a sealing structure commonly used in the mechanical field can be used for the mechanical seal structure 11.

[0032] Specifically, a medium inflow pipe 12 is installed on the drive seat 41, and a mechanical seal structure 11 is provided between the rotating cylinder 42 and the medium inflow pipe 12. The medium flows into the rotating cylinder 42 through the medium inflow pipe 12 and flows towards the stator 2. Since the rotating cylinder 42 rotates relative to the medium inflow pipe 12 and needs to be sealed to prevent the medium from flowing into the drive seat 41, the mechanical seal structure 11 is also used to dynamically seal the rotating cylinder 42 and the medium inflow pipe 12.

[0033] Meanwhile, a medium outflow pipe 13 connected to the stator 2 is installed on the second mounting base 8, and the medium after passing through the stator 2 flows out from the medium outflow pipe 13.

[0034] Specifically, both the medium inflow pipe 12 and the medium outflow pipe 13 are provided with flange connection structures, which can be used to connect the pipelines and install the entire pump into the pipeline.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A straight-through single screw pump, characterized in that: It includes a base (1) and a stator (2), a helical rotor (3) is installed inside the stator (2), a rotary drive mechanism (4) is installed on the base (1), and a reciprocating transmission mechanism (5) is connected between the rotary drive mechanism (4) and the helical rotor (3). The reciprocating transmission mechanism (5) includes a pin seat (51) connected to the rotary drive mechanism (4), a transmission pin (52) is fixedly installed on the pin seat (51), a sliding sleeve seat (53) is rotatably installed on the transmission pin (52), the sliding sleeve seat (53) can slide along the transmission pin (52), a short pin (54) is installed on the sliding sleeve seat (53), a connector (55) is rotatably installed on the short pin (54), and the helical rotor (3) is connected to the connector (55).

2. A straight-through single screw pump according to claim 1, characterized in that: A sliding bearing (56) is provided between the sliding sleeve seat (53) and the transmission pin (52), and a sliding bearing (56) is provided between the connector (55) and the short pin (54).

3. A straight-through single screw pump according to claim 2, characterized in that: The rotary drive mechanism (4) includes a drive seat (41) mounted on a base (1) and a rotating cylinder (42) rotatably mounted inside the drive seat (41). A bevel gear (43) is fixedly mounted on the rotating cylinder (42). A drive motor (44) is mounted on the drive seat (41). The drive shaft of the drive motor (44) is connected to a bevel gear (45) via a coupling (46). The bevel gear (45) meshes with the bevel gear (43). The rotating cylinder (42) is fastened to the pin seat (51).

4. A straight-through single screw pump according to claim 3, characterized in that: A connecting shell (6) is installed on the drive seat (41) and sleeved on the outside of the reciprocating transmission mechanism (5). A first mounting seat (7) is installed at the end of the connecting shell (6). A second mounting seat (8) is installed on the base (1). The stator (2) is installed between the first mounting seat (7) and the second mounting seat (8). Multiple connecting rods (9) located on the outside of the stator (2) and evenly distributed in the circumferential direction are also connected between the first mounting seat (7) and the second mounting seat (8).

5. A straight-through single screw pump according to claim 4, characterized in that: An observation window (10) is provided on the connecting shell (6).

6. A straight-through single screw pump according to claim 5, characterized in that: A mechanical seal structure (11) is installed between the pin seat (51) and the first mounting seat (7).

7. A straight-through single screw pump according to claim 6, characterized in that: A medium inflow pipe (12) is installed on the drive seat (41), and a mechanical seal structure (11) is provided between the rotating cylinder (42) and the medium inflow pipe (12).

8. A straight-through single screw pump according to claim 7, characterized in that: The second mounting base (8) is equipped with a medium outflow pipe (13) that communicates with the stator (2).

9. A straight-through single screw pump according to claim 8, characterized in that: Both the medium inflow pipe (12) and the medium outflow pipe (13) are provided with flange connection structures.

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