A gear pump and filter assembly

Abstract

The utility model discloses a gear pump and filter assembly, including pump body, shell and gear pump main body. Its innovation point mainly lies in, the accommodating chamber of shell lower part is built -in filter core ware, and filter core ware partly extends shell, and its outer wall and shell form the clearance for liquid inflow between. Gear pump main body is directly arranged in filter core ware inner chamber, and liquid is directly into the liquid inlet of gear pump after filter core ware filtration. The liquid outlet of gear pump is communicated to a center liquid outlet pipe through inclined hole, and the center liquid outlet pipe extends downward and penetrates filter core ware bottom and is sealedly connected with it. The utility model discloses a filter and gear pump height integration, realized the compactness of structure, makes the pump body can directly immerse in liquid and work, effectively simplifies external pipeline, reduces the leakage point, especially suitable for the installation environment of limited space.

Description

Technical Field

[0001] This utility model relates to the field of fluid transport technology, specifically to a compact gear pump assembly with integrated filtration function. Background Technology

[0002] With the rapid development of fields such as precision instruments, automotive engineering, and home appliances, higher demands are being placed on miniature gear pumps used to transport liquids such as lubricating oil and fuel. Not only are stable output performance required, but significant challenges are also being posed to their space utilization, reliability, and ease of maintenance.

[0003] Currently, well-known gear pump systems typically face the following multi-layered technical challenges:

[0004] First layer: The system is bloated and has low space utilization. Traditional gear pumps and filters are two separate components that need to be connected in series through additional piping and connectors. This split design results in a loose structure for the entire pumping system, which occupies a large amount of space and is difficult to install in modern equipment with limited space.

[0005] The second layer: high risk of leakage and poor reliability. Due to the use of external piping connections, multiple potential leakage points are inevitably introduced into the system. These connections are prone to leakage under long-term vibration, pressure shock, and fluid corrosion, affecting the reliability and service life of the entire system.

[0006] The third issue is the long fluid path, which reduces efficiency. The split design results in a longer fluid path from the filter to the gear pump inlet. This not only increases flow resistance and reduces pumping efficiency, but may also affect system performance due to pipeline pressure loss.

[0007] Fourth layer: Complex installation and maintenance. Independent filters and pump bodies need to be installed and fixed separately. When maintaining or replacing filter elements, it is necessary to disassemble the pipeline, which is cumbersome, time-consuming and labor-intensive, and may introduce new problems due to improper installation.

[0008] Therefore, there is an urgent need in this field for a new type of gear pump solution that can effectively integrate filtration and pumping functions, achieve a compact structure, reduce leakage points, and improve the ease of installation and maintenance. Utility Model Content

[0009] To address the aforementioned deficiencies in existing technologies, this utility model aims to provide a highly integrated gear pump and filter assembly, which primarily solves the following technical problems:

[0010] How to eliminate external connecting pipes and achieve an extremely compact structural design;

[0011] How to minimize fluid leakage points in a system and improve reliability;

[0012] How to optimize the fluid path, reduce inlet resistance, and improve pumping efficiency;

[0013] How to simplify the installation and maintenance process.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] A gear pump and filter assembly includes a pump body, which comprises a housing and a gear pump body. The lower part of the housing has a receiving chamber, in which a filter element is housed. A portion of the filter element extends out of the housing, and a gap for liquid flow exists between the inner wall of the housing and the filter paper of the filter element. The gear pump body is located within the inner cavity of the filter element. The gear pump body has an inlet and an outlet. The inlet communicates with the inner cavity of the filter element, and the outlet is connected to a central outlet pipe via an oblique hole. The central outlet pipe extends downward and penetrates the bottom of the filter element, with its outer wall sealed and fixedly connected to the bottom of the filter element.

[0016] Preferably, the upper end of the filter element is sealed and fixedly connected to the upper wall of the receiving chamber by a sealing ring or an interference fit.

[0017] Preferably, the oblique hole is disposed on the pump cover of the gear pump body, with its inlet communicating with the liquid outlet of the gear pump body and its outlet connecting downward to the central liquid outlet pipe.

[0018] Preferably, a motor is installed inside the housing, and the output shaft of the motor is connected to the gear pump body for transmission.

[0019] Preferably, the motor includes a rotor, a rotor cover, and a coil frame. The rotor is covered by the rotor cover, and the rotor cover is covered by the coil frame. The coil frame has a double-layer hollow structure with multiple coils wound around its middle. The coils surround the rotor cover.

[0020] Preferably, the coil frame is fitted with a bracket, and the bottom of the bracket extends downward to form multiple hooks for engaging the outer flange of a connecting disc.

[0021] Preferably, the connecting disc is sleeved on the coil frame and located below the bracket. The outer periphery of the connecting disc extends outward to form the outer flange, and the outer flange is provided with a plurality of screw holes. The housing is provided with a ring of spaced studs, and the screw holes are sleeved with the studs for positioning and fixation.

[0022] Preferably, the number and position of the hooks of the bracket correspond to the distribution of the screw holes of the connecting plate, and each hook is engaged on the outward flange between two adjacent screw holes.

[0023] Preferably, the inner side or root of the hook is provided with a groove, and the corresponding position of the housing is provided with a rib, and the groove engages with the rib.

[0024] Preferably, the upper part of the bracket is provided with a circuit board, and the output ends of the plurality of coils are wound and fixed to the bracket and electrically connected to the circuit board; one end of the circuit board is provided with an interface for connecting an external power source, and the other end is electrically connected to the coils through the wiring on the circuit board.

[0025] Beneficial effects

[0026] Compared with the prior art, the gear pump and filter assembly provided by this utility model has the following significant advantages:

[0027] 1. Highly integrated and compact structure: The filter element is used as the mounting cavity of the gear pump body, realizing the integration of the filter and the pump body. The external connecting pipeline is eliminated, which greatly reduces the size of the entire component and allows it to be directly immersed in the liquid tank for use. It is particularly suitable for applications with harsh space requirements.

[0028] 2. Minimal Leakage Points and High Reliability: By eliminating most external piping connections, the potential leakage points of the system are significantly reduced. Key connections such as the upper end of the filter element to the housing and the central outlet pipe to the bottom of the filter element all employ sealed structures, ensuring the system's sealing reliability during long-term operation.

[0029] 3. Optimized fluid path and improved efficiency: The liquid enters from the outside of the filter element through the gap, and after filtration, it directly enters the inlet of the gear pump. The flow path is short and smooth, which effectively reduces the inlet resistance and improves the suction performance and overall working efficiency of the gear pump.

[0030] 4. Modular design for easy installation and maintenance: Internal components such as the motor, bracket, and coil frame are pre-assembled into a module via connecting plates and then fixed inside the housing, simplifying the assembly process. When the filter element needs to be replaced, simply remove the entire assembly from the liquid tank for replacement, making maintenance extremely convenient. Attached Figure Description

[0031] Figure 1 This is an overall structural diagram of the gear pump and filter assembly described in this utility model.

[0032] Figure 2 This is an overall structural diagram of the gear pump and circuit board of this utility model.

[0033] Figure 3 This is an overall structural diagram of the installation of the housing and connecting plate described in this utility model.

[0034] Figure 4This is an overall structural diagram of the installation of the housing and bracket described in this utility model.

[0035] Figure 5 This is an overall structural diagram of the motor and filter assembly described in this utility model.

[0036] Figure 6 This is a top view of the installation structure of the motor and filter assembly described in this utility model.

[0037] Figure 7 This is a schematic cross-sectional view of the installation of the motor and filter assembly described in this utility model.

[0038] Explanation of the labels in the diagram:

[0039] 1. Housing; 2. Gear pump body; 3. Receiving chamber; 4. Filter element; 6. Inlet; 7. Outlet; 8. Slanted hole; 9. Central outlet pipe; 10. Motor; 11. Rotor; 12. Rotor cover; 13. Coil frame; 14. Coil; 15. Bracket; 16. Hook; 17. Connecting plate; 18. Outward flange; 19. Screw hole; 20. Stud; 21. Slot; 22. Rib; 23. Circuit board. Detailed Implementation

[0040] like Figure 1-7 As shown, the gear pump and filter assembly provided by this utility model includes a pump body, which includes a housing 1 and a gear pump body 2. The lower part of the housing 1 is provided with a receiving chamber 3, and a filter element 4 is built into the receiving chamber 3. A portion of the filter element 4 extends out of the housing 1, and there is a gap between the inner wall of the housing 1 and the filter paper of the filter element 4 for liquid flow. The gear pump body 2 is located in the inner cavity of the filter element 4. The gear pump body 2 has an inlet 6 and an outlet 7. The inlet 6 communicates with the inner cavity of the filter element 4, and the outlet 7 is connected to a central outlet pipe 9 through an oblique hole 8. The central outlet pipe 9 extends downward and penetrates the bottom of the filter element 4, and its outer wall is sealed and fixedly connected to the bottom of the filter element 4.

[0041] Specifically, the core of this design lies in directly embedding the gear pump body 2 within the inner cavity of the filter element 4. The lower part of the housing 1 has a receiving chamber 3, in which the filter element 4 is installed, and its upper end is sealed and fixed to the upper wall of the receiving chamber 3 via a sealing ring. The lower part of the filter element 4 extends out of the housing 1, and a gap is maintained between its filter paper and the inner wall of the housing 1 to serve as a liquid inlet channel.

[0042] When the component is immersed in liquid for operation, the liquid (such as lubricating oil) enters from the outside of the protruding part of the filter element 4 through the gap and penetrates the filter paper of the filter element 4 to complete filtration. After the clean liquid enters the inner cavity of the filter element 4, it flows directly to the liquid inlet 6 of the gear pump body 2 located inside it.

[0043] The housing 1 houses a motor 10, whose output shaft is connected to the gear pump body 2. Driven by the motor 10, the gear pump body 2 pressurizes the liquid and discharges it from the outlet 7. The discharged liquid flows through an oblique hole 8 machined on the pump cover into the central outlet pipe 9, and is finally discharged downwards through the central outlet pipe 9 to the external system. The outer wall of the central outlet pipe 9 is sealed to the bottom of the filter element 4 through welding or interference fit.

[0044] The fixing structure of the motor 10 also reflects the compactness of this utility model.

[0045] The motor 10 includes a rotor 11, a rotor cover 12, and a coil frame 13. The rotor 11 is covered by the rotor cover 12, and the rotor cover 12 is covered by the coil frame 13. The coil frame 13 has a double-layer hollow structure, with multiple coils 14 wound around its middle. The coils 14 surround the rotor cover 12.

[0046] The coil frame 13 of the motor 10 is fitted with a bracket 15. Multiple hooks 16 extending from the bottom of the bracket 15 engage with the outer flange 18 of the connecting plate 17. The connecting plate 17 is fitted onto the coil frame 13 and located below the bracket 15. During assembly, the motor 10, coil frame 13, bracket 15, and connecting plate 17 are pre-assembled into a module. Then, the screw holes 19 on the outer flange 18 of the connecting plate 17 are aligned with the studs 20 on the housing 1, and the connection is secured. This completes the installation and positioning of the entire motor 10 within the housing 1.

[0047] The number and position of the hooks 16 of the bracket 15 correspond to the distribution of the screw holes 19 of the connecting plate 17, and each hook 16 is engaged on the outer flange 18 between two adjacent screw holes 19.

[0048] In addition, the bracket 15 has a slot 21 on its hook 16, which can engage with the protruding rib 22 on the inner side of the housing 1 to provide auxiliary positioning and anti-rotation function. A circuit board 23 is mounted on the upper part of the bracket 15, and the output ends of the plurality of coils 14 are wound and fixed to the bracket 15 and electrically connected to the circuit board 23; one end of the circuit board 23 has an interface for connecting to an external power source, and the other end is electrically connected to the coils 14 through the wiring on the circuit board 23. The circuit board 23 is used to connect to an external power source and supply power to the coils 14.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gear pump and filter assembly, comprising a pump body, the pump body including a housing and a gear pump body, characterized in that, The lower part of the housing is provided with a receiving chamber, in which a filter element is placed. A portion of the filter element extends out of the housing, and there is a gap between the inner wall of the housing and the filter paper of the filter element for liquid flow. The inner cavity of the filter element is provided with the gear pump body, which has an inlet and an outlet. The inlet communicates with the inner cavity of the filter element, and the outlet is connected to a central outlet pipe through an oblique hole. The central outlet pipe extends downward and penetrates the bottom of the filter element, and the outer wall of the central outlet pipe is sealed and fixedly connected to the bottom of the filter element.

2. The gear pump and filter assembly according to claim 1, characterized in that, The upper end of the filter element is sealed and fixedly connected to the upper wall of the receiving chamber by a sealing ring or an interference fit.

3. The gear pump and filter assembly according to claim 1, characterized in that, The oblique hole is provided on the pump cover of the gear pump body. The inlet of the oblique hole is connected to the liquid outlet of the gear pump body, and the outlet of the oblique hole is connected downward to the central liquid outlet pipe.

4. The gear pump and filter assembly according to claim 1, characterized in that, The housing contains a motor, and the output shaft of the motor is connected to the gear pump body for transmission.

5. The gear pump and filter assembly according to claim 4, characterized in that, The motor includes a rotor, a rotor cover, and a coil frame. The rotor is covered by the rotor cover, and the rotor cover is covered by the coil frame. The coil frame has a double-layer hollow structure, and multiple coils are wound around the center of the coil frame. The coils surround the rotor cover.

6. The gear pump and filter assembly according to claim 5, characterized in that, The coil frame is fitted with a bracket, and the bottom of the bracket extends downward to form multiple hooks for engaging the outer flange of a connecting disc.

7. The gear pump and filter assembly according to claim 6, characterized in that, The connecting disc is sleeved on the coil frame and located below the bracket. The outer periphery of the connecting disc extends outward to form the outer flange, and the outer flange is provided with multiple screw holes. The housing is provided with a ring of spaced studs, and the screw holes are sleeved with the studs for positioning and fixation.

8. The gear pump and filter assembly according to claim 7, characterized in that, The number and position of the hooks of the bracket correspond to the distribution of the screw holes of the connecting plate, and each hook is engaged on the outward flange between two adjacent screw holes.

9. The gear pump and filter assembly according to claim 6, characterized in that, The inner side or root of the hook is provided with a groove, and the corresponding position of the housing is provided with a rib, and the groove and the rib are engaged.

10. The gear pump and filter assembly according to claim 6, characterized in that, The upper part of the bracket is provided with a circuit board, and the output ends of the multiple coils are wound and fixed to the bracket and electrically connected to the circuit board; one end of the circuit board is provided with an interface for connecting an external power source, and the other end is electrically connected to the coils through the wiring on the circuit board.

Images