Mutual gear rotor pump

Abstract

The utility model discloses an interoperable gear rotor pump, which comprises a pump body provided with a first cavity, a second cavity, a feed port and a discharge port; the driving assembly comprises a first transmission shaft, a second transmission shaft and a driving part, and the first transmission shaft and the second transmission shaft are parallel and rotatably arranged on the pump body in a penetrating mode; one end of the first transmission shaft penetrates through the first cavity and is sleeved with a first transmission gear; one end of the second transmission shaft penetrates through the first cavity and is sleeved with a second transmission gear; the first transmission gear is meshed with the second transmission gear; the driving part is in driving connection with the first transmission shaft; the first meshing piece is located in the second cavity and is in key connection with the first transmission shaft; the second meshing piece is located in the second cavity, is in key connection with the second transmission shaft and is used for being meshed with the second meshing piece; the oil injection nozzle is arranged on the pump body and communicates with the first cavity. The problem that the production cost is increased due to the fact that different types of gear pumps or rotor pumps are selected to meet actual requirements in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of slurry conveying technology, specifically to an interchangeable gear rotor pump. Background Technology

[0002] In related technologies, gear pumps or rotary pumps are commonly used to transport high-viscosity substances. Gear pumps typically use a drive shaft to drive two meshing gears to rotate within a cavity to achieve slurry transport. Rotary pumps typically use a drive shaft to drive two meshing rotors to rotate within a cavity to achieve slurry transport. Gear pumps and rotary pumps each have different advantages and disadvantages. Since the drive shaft and gears or rotors are usually connected as one unit and are difficult to replace, it is usually necessary to select different types of gear pumps or rotary pumps according to actual usage requirements, such as changing flow rate, accuracy, or adapting to different media, to meet actual needs. This necessitates the configuration of multiple gear pumps or rotary pumps, leading to increased production costs. Utility Model Content

[0003] This invention provides an interoperable gear rotor pump to solve the problem of increased production costs caused by the existing method of selecting different types of gear pumps or rotor pumps to meet actual needs.

[0004] This utility model provides an interchangeable gear rotor pump, comprising:

[0005] The pump body has a first chamber and a second chamber arranged at intervals; the pump body has an inlet and an outlet on both sides of the second chamber, respectively;

[0006] The drive assembly includes a first drive shaft, a second drive shaft, and a drive member. The first and second drive shafts are rotatably mounted on the pump body and are arranged in parallel. One end of the first drive shaft passes through the first cavity and is fitted with a first drive gear, while the other end extends into the second cavity. One end of the second drive shaft passes through the first cavity and is fitted with a second drive gear, while the other end extends into the second cavity. The first drive gear meshes with the second drive gear. The drive member is drivenly connected to the first drive shaft and is used to drive the first drive shaft to rotate.

[0007] The first engaging member is located in the second cavity and is keyed to the first drive shaft;

[0008] The second engaging member is located in the second cavity and is keyed to the second drive shaft for engaging with the second engaging member to convey slurry;

[0009] The oil inlet is mounted on the pump body and communicates with the first cavity.

[0010] In one optional embodiment, the device further includes a first connecting key and a first screw; the first connecting key is provided on the periphery of one end of the first drive shaft located in the second cavity; a first connecting groove is provided on one side of the first engaging member, and a first countersunk hole communicating with the first connecting groove is provided on the other side; the first engaging member is sleeved on the end of the first drive shaft through the first connecting groove, and a first keyway is provided on the side wall of the first connecting groove corresponding to the first connecting key; the first connecting key is adapted to be embedded in the first keyway; the first screw passes through the first countersunk hole and is threadedly connected to the first drive shaft.

[0011] In one optional embodiment, a second connecting key and a second screw are further included; the second connecting key is provided on the periphery of one end of the second drive shaft located in the second cavity; a second connecting groove is provided on one side of the second engaging member, and a second countersunk hole communicating with the second connecting groove is provided on the other side; the second engaging member is sleeved on the end of the second drive shaft through the second connecting groove, and a second keyway is provided on the side wall of the second connecting groove corresponding to the second connecting key; the second connecting key is adapted to be embedded in the second keyway; the second screw passes through the second countersunk hole and is threadedly connected to the second drive shaft.

[0012] In one alternative embodiment, both the first meshing element and the second meshing element are gears or rotors.

[0013] In one alternative embodiment, a lifting ring is provided at the top of the pump body.

[0014] In one optional embodiment, the pump body includes a first end cover, a second end cover, and a support; the first end cover and the second end cover are detachably connected to both sides of the support, respectively, for forming the first cavity and the second cavity with the support; a first sealing ring is provided between the first end cover and the support; a second sealing ring is provided between the second end cover and the support.

[0015] In one optional embodiment, locating pins are provided on both sides of the support, and the first end cap and the second end cap are both connected to the locating pins; the first end cap and the second end cap are both connected to the support screws.

[0016] In one alternative embodiment, a first oil seal is embedded on the side of the first end cap away from the support, and the first drive shaft is rotatably inserted through the first oil seal.

[0017] In one optional embodiment, the support is provided with a first bearing and a second bearing, and the first drive shaft and the second drive shaft pass through the first bearing and the second bearing, respectively.

[0018] In one optional embodiment, the support is provided with a second oil seal and a third oil seal, and the first drive shaft and the second drive shaft pass through the second oil seal and the third oil seal, respectively.

[0019] The technical solution of this utility model has at least the following advantages:

[0020] 1. In this utility model, the first meshing component and the second meshing component are connected to the first drive shaft and the second drive shaft respectively by key connection, so as to facilitate the replacement of the first meshing component and the second meshing component. According to the flow rate, accuracy and slurry type, only different types of first meshing components and second meshing components need to be replaced to meet the requirements, reduce production costs and improve the scope of application. For example, the first meshing component and the second meshing component can be gears or rotors to achieve interchangeability between gears and rotors.

[0021] 2. In this utility model, the angle difference between the first drive shaft and the second drive shaft when they are engaged can be pre-adjusted to facilitate positioning of the first meshing part and the second meshing part during assembly, ensuring that the first meshing part and the second meshing part engage at an appropriate angle, thereby improving assembly accuracy and efficiency.

[0022] 3. In this utility model, an oil injection nozzle communicating with the first cavity is provided on the pump body to facilitate the injection of lubricating oil through the oil injection nozzle, thereby improving the smoothness of the transmission process between the first transmission gear and the second transmission gear, reducing wear, reducing maintenance frequency, and thus increasing service life. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an interoperable gear rotor pump according to an embodiment of the present invention from a first perspective.

[0025] Figure 2 This is an exploded view of an interchangeable gear rotor pump according to an embodiment of the present invention from a second perspective.

[0026] Figure 3 This is a structural schematic diagram of an interchangeable gear rotor pump according to an embodiment of the present utility model from a third-view perspective.

[0027] Figure 4 for Figure 3 Sectional view at point AA;

[0028] Figure 5 This is a schematic diagram of a first partial structure of an interoperable gear rotor pump according to an embodiment of the present utility model from a third-view perspective.

[0029] Figure 6 This is a schematic diagram of a second partial structure of an interoperable gear rotor pump according to an embodiment of the present utility model from a third-view perspective.

[0030] Figure 7 This is a schematic diagram of the structure of the first and second meshing components of this utility model when they are gears.

[0031] Figure 8 This is a schematic diagram of the structure of the first and second meshing components of this utility model when they are rotors;

[0032] Figure 9 This is a schematic diagram of the structure of the first meshing member and the second meshing member of a first type of gear in an embodiment of the present utility model.

[0033] Figure 10 This is a schematic diagram of the structure of the first meshing member and the second meshing member of the second type of gear in an embodiment of the present utility model.

[0034] Figure 11 This is a schematic diagram of the structure of the first meshing member and the second meshing member of the first type of rotor in an embodiment of the present utility model.

[0035] Figure 12 The first and second meshing components of this utility model are schematic diagrams of the structure of a second type of rotor.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Pump body; 101. First end cover; 102. Second end cover; 103. Support; 2. First cavity; 3. Second cavity; 4. Inlet; 5. Outlet; 6. First drive shaft; 7. Second drive shaft; 8. Drive component; 9. First drive gear; 10. Second drive gear; 11. First meshing component; 12. Second meshing component; 13. Oil nozzle; 14. First connecting key; 15. First screw; 16. First keyway; 17. Second connecting key; 18. Second screw; 19. Second keyway; 20. Lifting ring; 21. First sealing ring; 22. Second sealing ring; 23. Positioning pin; 24. First oil seal; 25. First bearing; 26. Second bearing; 27. Second oil seal; 28. Third oil seal; 29. ​​Coupling; 30. Mounting base plate; 31. First locking nut; 32. Second locking nut. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] The following is combined with Figures 1 to 12 The following describes embodiments of the present invention.

[0040] According to an embodiment of the present invention, an interchangeable gear rotor pump is provided, comprising: a pump body 1 having a first cavity 2 and a second cavity 3 spaced apart; an inlet 4 and an outlet 5 respectively located on both sides of the second cavity 3 on the pump body 1; a drive assembly including a first drive shaft 6, a second drive shaft 7, and a drive member 8, wherein the first drive shaft 6 and the second drive shaft 7 are rotatably mounted on the pump body 1 and are arranged in parallel; one end of the first drive shaft 6 passes through the first cavity 2 and is fitted with a first drive gear 9, and the other end extends into the second cavity 3. One end of the second drive shaft 7 passes through the first cavity 2 and is fitted with the second drive gear 10, while the other end extends into the second cavity 3; the first drive gear 9 meshes with the second drive gear 10; the drive member 8 is drivenly connected to the first drive shaft 6 and is used to drive the first drive shaft 6 to rotate; the first meshing member 11 is located in the second cavity 3 and is keyed to the first drive shaft 6; the second meshing member 12 is located in the second cavity 3 and is keyed to the second drive shaft 7 and is used to mesh with the second meshing member 12 to transport slurry; the oil nozzle 13 is disposed on the pump body 1 and communicates with the first cavity 2.

[0041] It should be noted that both sides of the first engaging member 11 and the second engaging member 12 maintain a small distance from the side walls of the second cavity 3, and the sides of the first engaging member 11 and the second engaging member 12 in the arrangement direction also maintain a small distance from the side walls of the second cavity 3, so as to form a relatively closed space for conveying slurry.

[0042] In this embodiment, when slurry needs to be transported, the first drive shaft 6 is driven to rotate by the drive component 8. The first drive shaft 6 drives the second drive gear 10 to rotate via the first drive gear 9, which in turn drives the second drive shaft 7 to rotate synchronously. This causes the first meshing member 11 and the second meshing member 12 to mesh and engage, forming pressure within the second cavity 3 to transport the slurry from the inlet 4 to the outlet 5, thus achieving slurry transport. The interchangeable gear rotor pump provided in this embodiment connects the first meshing member 11 and the second meshing member 12 to the first drive shaft 6 and the second drive shaft 7 respectively via key connections. This facilitates the replacement of the first meshing member 11 and the second meshing member 12. Depending on the flow rate, accuracy, and slurry type, only different types of the first meshing member 11 and the second meshing member 12 need to be replaced to meet the requirements, reducing production costs and increasing applicability. For example, the first meshing member 11 and the second meshing member 12 can be gears or rotors, achieving a combination of gears and rotors. Interoperability; the angle difference between the first drive shaft 6 and the second drive shaft 7 when they engage can be pre-adjusted to facilitate positioning of the first meshing part 11 and the second meshing part 12 during assembly, ensuring that the first meshing part 11 and the second meshing part 12 engage at an appropriate angle, thereby improving assembly accuracy and efficiency; in addition, an oil injection nozzle 13 communicating with the first cavity 2 is provided on the pump body 1 to facilitate the injection of lubricating oil through the oil injection nozzle 13, thereby improving the smoothness of the transmission process of the first drive gear 9 and the second drive gear 10, reducing wear, reducing maintenance frequency, and thus increasing service life.

[0043] Specifically, the first meshing member 11 and the second meshing member 12 are arranged vertically, and the feed inlet 4 and the discharge outlet 5 are horizontally arranged on both sides of the meshing point of the first meshing member 11 and the second meshing member 12. The first meshing member 11 and the second meshing member 12 have the same structure, so as to improve the fitting accuracy and ensure the conveying effect of the slurry.

[0044] In one embodiment, such as Figures 4 to 6 As shown, the interchangeable gear rotor pump also includes a first connecting key 14 and a first screw 15; the first drive shaft 6 is provided with the first connecting key 14 on one side of the second cavity 3; the first meshing member 11 is provided with a first connecting groove on one side and a first countersunk hole communicating with the first connecting groove on the other side; the first meshing member 11 is sleeved on the end of the first drive shaft 6 through the first connecting groove, and the side wall of the first connecting groove is provided with a first keyway 16 corresponding to the first connecting key 14; the first connecting key 14 is adapted to be embedded in the first keyway 16; the first screw 15 passes through the first countersunk hole and is threadedly connected to the first drive shaft 6.

[0045] In this embodiment, during assembly, the first meshing member 11 can be adapted to the end of the first drive shaft 6 via the first connecting key 14, and the first meshing member 11 can be positioned and installed by the first connecting key 14 cooperating with the first keyway 16. Then, the first screw 15 passes through the first countersunk hole and is fixedly connected to the first drive shaft 6 to improve stability.

[0046] In one embodiment, such as Figures 4 to 6 As shown, the interchangeable gear rotor pump also includes a second connecting key 17 and a second screw 18; the second drive shaft 7 is provided with a second connecting key 17 on one side of the second cavity 3; the second meshing member 12 is provided with a second connecting groove on one side and a second countersunk hole communicating with the second connecting groove on the other side; the second meshing member 12 is sleeved on the end of the second drive shaft 7 through the second connecting groove, and the side wall of the second connecting groove is provided with a second keyway 19 corresponding to the second connecting key 17; the second connecting key 17 is adapted to be embedded in the second keyway 19; the second screw 18 passes through the second countersunk hole and is threadedly connected to the second drive shaft 7.

[0047] In this embodiment, during assembly, the second meshing member 12 can be adapted to the end of the second drive shaft 7 via the second connecting key 17, and the second meshing member 12 can be positioned and installed by the second connecting key 17 cooperating with the second keyway 19. Then, the second screw 18 passes through the second countersunk hole and is fixedly connected to the second drive shaft 7 to improve stability. During installation, the mating angle of the first drive shaft 6 and the second drive shaft 7 is pre-adjusted so that the first connecting key 14 and the second connecting key 17 are misaligned, so that the first meshing member 11 and the second meshing member 12 are better in the meshing position, which facilitates positioning and installation, and improves assembly accuracy and efficiency.

[0048] In one embodiment, such as Figures 5 to 12 As shown, both the first meshing member 11 and the second meshing member 12 are gears or rotors.

[0049] In this embodiment, the first meshing member 11 and the second meshing member 12 can be gears or rotors to form a gear pump or a rotor pump. Gear pumps have advantages such as stable flow rate, strong self-priming ability, and applicability to high-viscosity media. Rotary pumps have advantages such as virtually no vulnerable parts during operation, minimal maintenance, simple cleaning process without dead corners, and all parts in contact with the slurry are made of 304 or 316L stainless steel, offering advantages such as hygiene, corrosion resistance, easy cleaning, low maintenance, and high pressure. By interchangeable gears and rotors, the entire system can possess all of the above advantages. Depending on actual needs, the first meshing member 11 and the second meshing member 12 can be selected as gears or rotors, and gears of different modules or rotors of different shapes can be replaced (e.g.,...). Figures 9 to 12 As shown in the figure, it can achieve functions such as changing the flow rate, changing the delivery accuracy, and adapting to different media.

[0050] In one embodiment, such as Figures 1 to 3 , Figure 7 and Figure 8 As shown, a lifting ring 20 is provided on the top of the pump body 1.

[0051] In this embodiment, a lifting ring 20 is provided on the top of the pump body 1 for convenient transportation.

[0052] Specifically, the lifting ring 20 is threadedly connected to the pump body 1, facilitating installation and disassembly.

[0053] In one embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, the pump body 1 includes a first end cover 101, a second end cover 102, and a support 103; the first end cover 101 and the second end cover 102 are detachably connected to both sides of the support 103, and are used to form a first cavity 2 and a second cavity 3 respectively with the support 103; a first sealing ring 21 is provided between the first end cover 101 and the support 103; a second sealing ring 22 is provided between the second end cover 102 and the support 103.

[0054] In this embodiment, the pump body 1 is formed by connecting a first end cover 101, a second end cover 102 and a support 103, which facilitates installation and disassembly for maintenance. The first end cover 101 is connected to the support 103 through a first sealing ring 21, and the second end cover 102 is connected to the support 103 through a second sealing ring 22, which improves the sealing effect and prevents the leakage of lubricating oil in the first cavity 2 and the leakage of slurry in the second cavity 3.

[0055] Specifically, the lifting ring 20 is mounted on the support 103 to ensure sufficient connection strength.

[0056] Specifically, the oil injection nozzle 13 is located on the top of the first end cap 101, so that the injected lubricating oil can pass through the first transmission gear 9 and the second transmission gear 10.

[0057] In one embodiment, such as Figure 2 and Figure 4 As shown, both sides of the support 103 are provided with positioning pins 23, and the first end cap 101 and the second end cap 102 are both connected to the positioning pins 23; the first end cap 101 and the second end cap 102 are both connected to the support 103 with screws.

[0058] In this embodiment, positioning pins 23 are provided on both sides of the support 103 to connect the first end cap 101 and the second end cap 102 for positioning and installation, thereby improving assembly efficiency and accuracy. The first end cap 101 and the second end cap 102 are both connected to the support 103 with screws for easy installation and disassembly.

[0059] In one embodiment, such as Figure 2 and Figure 4As shown, a first oil seal 24 is embedded on the side of the first end cap 101 away from the support 103, and the first drive shaft 6 is rotatably inserted into the first oil seal 24.

[0060] It should be noted that the end of the first drive shaft 6 that is away from the second cavity 3 extends to the outside of the pump body 1 to connect to the drive component 8.

[0061] In this embodiment, a first oil seal 24 is provided on the first end cover 101 to seal and connect with the first drive shaft 6, thereby preventing lubricating oil leakage.

[0062] In one embodiment, such as Figure 2 and Figure 4 As shown, the support 103 is provided with a first bearing 25 and a second bearing 26, and the first drive shaft 6 and the second drive shaft 7 are respectively passed through the first bearing 25 and the second bearing 26.

[0063] In this embodiment, by setting a first bearing 25 and a second bearing 26 on the support 103 to cooperate with the first transmission shaft 6 and the second transmission shaft 7, the first transmission shaft 6 and the second transmission shaft 7 are supported to rotate, thereby improving the stability during the transmission process.

[0064] Specifically, such as Figure 2 and Figure 4 As shown, the interchangeable gear rotor pump also includes a first locking nut 31 and a second locking nut 32. The support 103 is provided with a first mounting groove and a second mounting groove corresponding to the first bearing 25 and the second bearing 26, respectively. The first bearing 25 and the second bearing 26 are respectively embedded in the first mounting groove and the second mounting groove. The first locking nut 31 and the second locking nut 32 are fixed to the support 103 by a third screw and abut against the first bearing 25 and the second bearing 26, respectively, to realize the installation of the first bearing 25 and the second bearing 26 and improve stability.

[0065] In one embodiment, such as Figure 4 As shown, the support 103 is provided with a second oil seal 27 and a third oil seal 28, and the first drive shaft 6 and the second drive shaft 7 are respectively inserted into the second oil seal 27 and the third oil seal 28.

[0066] It should be noted that the second oil seal 27 is located between the first bearing 25 and the second cavity 3, and the third oil seal 28 is located between the second bearing 26 and the second cavity 3.

[0067] In this embodiment, by providing a second oil seal 27 and a third oil seal 28 in the support 103 to seal the first drive shaft 6 and the second drive shaft 7, the lubricating oil in the first cavity 2 is prevented from penetrating into the second cavity 3 and causing contamination of the slurry. At the same time, the slurry in the second cavity 3 is prevented from penetrating into the first cavity 2 and affecting the transmission effect.

[0068] Specifically, such as Figure 4 As shown, the driving component 8 is a drive motor, which is fixed on the first end cover 101 by a fixed base. The output shaft of the drive motor is driven and connected to the first transmission shaft 6 by a coupling 29.

[0069] Specifically, such as Figure 1 and Figure 2 As shown, the bottom of the support 103 is provided with a mounting base plate 30, which is used to fix the support to the external equipment, thereby improving the connection strength and stability.

[0070] Specifically, the interchangeable gear rotor pump also includes a first chuck and a second chuck. The first chuck and the second chuck are respectively threaded to both sides of the second end cover 102. The feed port 4 and the discharge port 5 are respectively set on the first chuck and the second chuck for easy installation and disassembly, and for easy maintenance.

[0071] The specific working principle of the interoperable gear rotor pump provided in this embodiment is as follows: During assembly, the first keyway 16 on the first drive shaft 6 and the second keyway 19 on the second drive shaft 7 can be pre-adjusted to an appropriate angular difference to facilitate precise positioning and installation of the first meshing member 11 and the second meshing member 12 via key connection. When slurry needs to be transported, the drive motor drives the first drive shaft 6 to rotate via the coupling 29. The first drive shaft 6 drives the second drive gear 10 to rotate via the first drive gear 9, thereby driving the second drive shaft 7 to rotate synchronously, so that the first meshing member 11 and the second meshing member 12 mesh together. The pump is designed to pressurize and transport the slurry within the second cavity 3, conveying it from the inlet 4 to the outlet 5. This allows for slurry transport by simply replacing the first engagement member 11 and the second engagement member 12 with different types depending on the flow rate, accuracy, and slurry type. This reduces production costs and expands the applicability of the pump. For example, the first engagement member 11 and the second engagement member 12 can be either gears or rotors, allowing for interchangeability between gears and rotors. This addresses the problem of increased production costs caused by the existing method of selecting different types of gear pumps or rotor pumps to meet actual needs.

[0072] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An interchangeable gear rotor pump, characterized in that, include: The pump body (1) has a first cavity (2) and a second cavity (3) arranged at intervals; the pump body (1) is provided with an inlet (4) and an outlet (5) on both sides of the second cavity (3); The drive assembly includes a first drive shaft (6), a second drive shaft (7), and a drive member (8). The first drive shaft (6) and the second drive shaft (7) are rotatably mounted on the pump body (1) and are arranged in parallel. One end of the first drive shaft (6) passes through the first cavity (2) and is fitted with a first drive gear (9), while the other end extends into the second cavity (3). One end of the second drive shaft (7) passes through the first cavity (2) and is fitted with a second drive gear (10), while the other end extends into the second cavity (3). The first drive gear (9) meshes with the second drive gear (10). The drive member (8) is drivenly connected to the first drive shaft (6) and is used to drive the first drive shaft (6) to rotate. The first engaging member (11) is located in the second cavity (3) and is keyed to the first drive shaft (6); The second engagement member (12) is located in the second cavity (3) and is keyed to the second drive shaft (7) for engaging with the second engagement member (12) to convey slurry; The oil nozzle (13) is disposed on the pump body (1) and communicates with the first cavity (2).

2. The interchangeable gear rotor pump according to claim 1, characterized in that, It also includes a first connecting key (14) and a first screw (15); the first drive shaft (6) is provided with the first connecting key (14) on one side of the second cavity (3); the first meshing member (11) is provided with a first connecting groove on one side and a first countersunk hole communicating with the first connecting groove on the other side; the first meshing member (11) is sleeved on the end of the first drive shaft (6) through the first connecting groove, and the side wall of the first connecting groove is provided with a first keyway (16) corresponding to the first connecting key (14); the first connecting key (14) is adapted to be embedded in the first keyway (16); the first screw (15) passes through the first countersunk hole and is threadedly connected to the first drive shaft (6).

3. The interchangeable gear rotor pump according to claim 1, characterized in that, It also includes a second connecting key (17) and a second screw (18); the second drive shaft (7) is provided with the second connecting key (17) on one side of the second cavity (3); the second meshing member (12) is provided with a second connecting groove on one side and a second countersunk hole communicating with the second connecting groove on the other side; the second meshing member (12) is sleeved on the end of the second drive shaft (7) through the second connecting groove, and the side wall of the second connecting groove is provided with a second keyway (19) corresponding to the second connecting key (17); the second connecting key (17) is adapted to be embedded in the second keyway (19); the second screw (18) passes through the second countersunk hole and is threadedly connected to the second drive shaft (7).

4. The interchangeable gear rotor pump according to claim 1, characterized in that, Both the first meshing member (11) and the second meshing member (12) are gears or rotors.

5. The interchangeable gear rotor pump according to claim 1, characterized in that, The pump body (1) is provided with a lifting ring (20) at the top.

6. The interchangeable gear rotor pump according to any one of claims 1 to 5, characterized in that, The pump body (1) includes a first end cap (101), a second end cap (102), and a support (103); the first end cap (101) and the second end cap (102) are detachably connected to both sides of the support (103) to form the first cavity (2) and the second cavity (3) respectively with the support (103); a first sealing ring (21) is provided between the first end cap (101) and the support (103); a second sealing ring (22) is provided between the second end cap (102) and the support (103).

7. The interchangeable gear rotor pump according to claim 6, characterized in that, The support (103) is provided with positioning pins (23) on both sides. The first end cap (101) and the second end cap (102) are both connected to the positioning pins (23). The first end cap (101) and the second end cap (102) are both connected to the support (103) with screws.

8. The interchangeable gear rotor pump according to claim 6, characterized in that, The first end cap (101) is fitted with a first oil seal (24) on the side opposite to the support (103), and the first drive shaft (6) is rotatably inserted into the first oil seal (24).

9. The interchangeable gear rotor pump according to claim 6, characterized in that, The support (103) is provided with a first bearing (25) and a second bearing (26), and the first drive shaft (6) and the second drive shaft (7) are respectively passed through the first bearing (25) and the second bearing (26).

10. The interchangeable gear rotor pump according to claim 6, characterized in that, The support (103) is provided with a second oil seal (27) and a third oil seal (28), and the first drive shaft (6) and the second drive shaft (7) are respectively inserted into the second oil seal (27) and the third oil seal (28).

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