Bipolar series gear pump

Abstract

The utility model discloses a bipolar series gear pump, and relates to the field of delivery pumps, the bipolar series gear pump comprises a base, an end cover, a first module, a second module and a driving shaft, the first module and the second module are located between the base and the end cover, the driving shaft drives the first module and the second module, and the base, the first module, the second module and the end cover are sequentially stacked and then locked into a whole through a locking rod connecting the base and the end cover; the first module and the second module are both of involute internal gear pumping structures, and an oil suction cavity and an oil pressing cavity are formed in each of the first module and the second module; the oil pressing cavity in the first module is communicated with the oil suction cavity in the second module in an aligned mode, and the second module conducts secondary pressure pumping on liquid sent out by the first module. The gear pump can provide larger flow while ensuring high output pressure so as to meet diversified requirements in industrial applications such as machine tool cooling liquid pumping.

Description

Technical Field

[0001] This application relates to the field of transfer pumps, and specifically to a bipolar series gear pump. Background Art

[0002] A gear pump is a type of hydraulic pump that is widely used in the pumping of various liquids. In the field of machine tools, gear pumps are often used to pump coolant to ensure the normal operation and machining accuracy of machine tools. However, existing gear pumps still have many deficiencies in terms of integration and performance.

[0003] Currently, many systems adopt a series pump design, usually consisting of two independent gear pumps operating separately and driven by two motors. This design results in a large equipment volume, high cost, and the need to additionally consider the synchronous operation of the two pumps. The synchronization problem increases the complexity and failure risk of the system, making maintenance and management more difficult. In addition, the low integration of this design requires a large installation and layout space, which is not conducive to the development and application of compact equipment.

[0004] On the other hand, a single gear pump shows obvious limitations when applied to scenarios that require high flow rate and high pressure. When the flow rate of the gear pump is large, the output pressure is often low. This situation is difficult to meet the requirements of machine tool coolant pumping because the coolant needs to be discharged from the preset holes of the tool under high pressure for effective cooling. Although the output pressure can be increased by reducing the pump output per revolution and the required pump output can be achieved using a higher rotational speed, this method places higher requirements on the heat dissipation of the pump, the motor power, and the overall manufacturing cost. High-speed operation not only increases the wear and noise of the equipment but also affects the operating stability and lifespan of the gear pump.

[0005] Therefore, it is difficult for the prior art to provide sufficient flow rate while maintaining a high output pressure to meet the requirements in industrial applications. Summary of the Utility Model

[0006] It is possible to provide a relatively large flow rate while ensuring a high output pressure to meet the diverse requirements in industrial applications such as machine tool coolant pumping.

[0007] To achieve the above object, this application discloses a bipolar series gear pump, including a base, an end cover, a first module and a second module located between the base and the end cover, and a drive shaft driving the first module and the second module. Among them, after the base, the first module, the second module, and the end cover are stacked in sequence, they are locked into one body by a locking rod connecting the base and the end cover; both the first module and the second module are involute internal meshing gear pumping structures, and an oil suction chamber and a pressure oil chamber are provided in both the first module and the second module; the pressure oil chamber in the first module is in alignment and communication with the oil suction chamber in the second module, and the second module performs secondary pressurized pumping on the liquid sent by the first module.

[0008] Furthermore, the first module and the second module have the same structure, both of which include a fixed block with a circular groove, a crescent plate vertically arranged in the circular groove, an outer rotor that is suitable for the size of the circular groove and rotatably installed in the circular groove, and an inner rotor that is installed in the outer rotor and is eccentrically arranged with the outer rotor and partially meshed; the inner rotor is aligned with the crescent plate to form an oil pressure chamber and an oil suction chamber on both sides of the crescent plate respectively; the inner rotors in the first module and the second module are both sleeved on the drive shaft and driven to rotate by the drive shaft.

[0009] Specifically, the fixing block in the first module cooperates with the fixing block in the second module to seal the circular groove to form a first working room; the fixing block in the second module cooperates with the end cover to seal the circular groove to form a second working room.

[0010] Furthermore, a sealed bearing for installing the drive shaft is provided in the base.

[0011] Furthermore, the first module and the fixing block in the second module are sealed together by at least one sealing ring.

[0012] Furthermore, the base is provided with a liquid inlet which communicates with the oil suction cavity in the first module.

[0013] Furthermore, a liquid outlet communicating with the oil pressure chamber in the second module is provided in the end cover.

[0014] Furthermore, the inner rotor is an inner gear ring, and the inner rotor is a gear meshing with the inner gear ring; the meshing positions of the crescent plate and the inner and outer rotors are opposite.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0016] 1. Efficient pumping and secondary pressurization: The pump adopts an involute internal meshing gear pumping structure, and realizes secondary pressurization pumping of the liquid through the series design of the first module and the second module. The oil pressure chamber of the first module is connected with the oil suction chamber of the second module in a positional manner, so that the liquid is further pressurized when passing through the second module, thereby improving the pumping efficiency and output pressure, and meeting the needs of high pressure and large flow.

[0017] 2. Compact modular design: The base, first module, second module and end cover of the pump are stacked in sequence and firmly locked together by a locking rod to form a compact overall structure. The modular design not only saves installation space and improves the stability and reliability of the equipment, but also enables each component to be manufactured and maintained independently, simplifies the production and maintenance process, and reduces maintenance costs.

[0018] 3. Excellent sealing performance and high adaptability: A sealing ring is provided between the fixed blocks of the first module and the second module to ensure the sealing fit between the modules and effectively prevent liquid leakage. The design of the sealed bearing and the drive shaft further enhances the sealing performance of the pump, ensuring long-term efficient operation. The base and the end cover are respectively provided with a liquid inlet and a liquid outlet, enabling the pump to be flexibly connected to external liquid sources and drainage systems, and adapting to various liquid media and industrial application requirements.

[0019] The beneficial effects listed above do not exhaust all the advantages. Other potential beneficial effects and detailed technical implementation manners will be further disclosed in the embodiments or other description parts of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] After reading the following specific implementation manners in conjunction with the drawings, various aspects of the present disclosure will be better understood. The positions, dimensions, and ranges of the structures shown in the drawings and the like sometimes do not represent the actual positions, dimensions, and ranges, etc. In the drawings:

[0021] Figure 1 is a schematic structural view of an embodiment disclosed in this application from one perspective.

[0022] Figure 2 is a schematic structural view of an embodiment disclosed in this application from another perspective.

[0023] Figure 3 is a schematic structural view of an embodiment disclosed in this application from yet another perspective.

[0024] Figure 4 is an exploded view of the structure of an embodiment disclosed in this application.

[0025] Figure 5 is a schematic structural view of the first module in an embodiment disclosed in this application.

[0026] Figure 6 is a schematic structural view of the first module in an embodiment disclosed in this application from another perspective.

[0027] Figure 7 is a schematic structural view of the fixed block in an embodiment disclosed in this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present disclosure will be described below with reference to the drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully explain the protection scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0029] It should be understood that in all the accompanying drawings, the same reference numerals denote the same elements. In the drawings, for the sake of clarity, the dimensions of some features may be distorted.

[0030] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification.

[0031] The singular forms "a", "the", and "said" used in the specification include the plural forms unless clearly specified otherwise. The terms "comprising", "including", and "containing" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the related listed items. Embodiment

[0032] As Figures 1 to 7 shown, an end cap 2, a first module 3 and a second module 4 located between a base 1 and the end cap 2, and a drive shaft 7 for driving the first module 3 and the second module 4. The base 1, the first module 3, the second module 4, and the end cap 2 are stacked in sequence and locked into one body by a locking rod connecting the base 1 and the end cap 2. Both the first module 3 and the second module 4 are involute internal meshing gear pumping structures, and an oil suction cavity 12 and an oil pressure cavity 13 are provided in both modules. The oil pressure cavity 13 in the first module 3 is in alignment communication with the oil suction cavity 12 in the second module 4, so that the second module 4 performs secondary pressurized pumping on the liquid sent out by the first module 3.

[0033] Specifically, a sealed bearing for the installation of the drive shaft 7 is provided in the base 1 to ensure the stable operation of the drive shaft 7. A liquid inlet 5 is provided on the base 1, and the liquid inlet 5 is in communication with the oil suction cavity 12 in the first module 3. The base 1 is made of high-strength aluminum alloy material, and the outer surface is treated by anodic oxidation, having good corrosion resistance and mechanical strength.

[0034] In this embodiment, the structures of the first module 3 and the second module 4 are the same, and both are composed of a fixed block 8, a crescent plate 9, an outer rotor 10, and an inner rotor 11. The fixed block 8 is recessed with a circular groove 14 for installing other components. The crescent plate 9 is vertically arranged in the circular groove 14 for separating the oil suction chamber 12 and the oil pressure chamber 13. The outer rotor 10 is adapted to the size of the circular groove 14 and is rotatably installed in the circular groove 14. The inner rotor 11 is installed inside the outer rotor 10, is eccentrically arranged with the outer rotor 10 and partially meshes to form an internal gear ring. The inner rotor 11 is driven to rotate by a drive shaft 7. The fixed block 8 is made of high-strength stainless steel material, has a smooth end face, and is provided with hole positions for positioning and inserting, ensuring accurate alignment and sealing fit during installation.

[0035] During operation, the drive shaft 7 drives the inner rotor 11 to rotate. Since the inner rotor 11 meshes with the outer rotor 10, the outer rotor 10 synchronously rotates eccentrically relative to the inner rotor 11. The liquid enters the oil suction chamber 12 in the first module 3 from the liquid inlet 5 of the base 1, enters the oil suction chamber 12 of the second module 4 after being pressurized by the oil pressure chamber 13 of the first module 3, and is further pressurized and pumped through the oil pressure chamber 13 of the second module 4, and finally is output through the liquid outlet 6 of the end cover 2. The fixed block 8 in the first module 3 cooperates with the fixed block 8 in the second module 4 to seal the circular groove 14 to form a first working chamber; the fixed block 8 in the second module 4 cooperates with the end cover 2 to seal the circular groove 14 to form a second working chamber. In addition, a sealing bearing for installing the drive shaft 7 is provided in the base 1 to ensure the stable operation of the drive shaft 7.

[0036] In the first module 3 and the second module 4, the fixed blocks 8 are hermetically fitted through at least one sealing ring. The sealing ring is made of fluororubber material and has excellent heat resistance and chemical corrosion resistance to ensure that the liquid does not leak during the working process. The base 1 is provided with a liquid inlet 5 communicated and fitted with the oil suction chamber 12 in the first module 3, and the end cover 2 is provided with a liquid outlet 6 communicated and fitted with the oil pressure chamber 13 in the second module 4, thereby ensuring the smooth inlet and outlet of the liquid. The inner rotor 11 is an internal gear ring, and the inner rotor 11 meshes with an external gear ring to form a transmission mechanism. The meshing positions of the crescent plate 9 with the inner rotor 11 and the outer rotor 10 are opposite to ensure the effective pumping and pressurization of the liquid.

[0037] This bipolar series gear pump is particularly suitable for tool machine tools with central water outlet. In traditional tool machine tools, due to insufficient liquid pressurization, the cooling effect is poor, affecting the machining accuracy and tool life. Through the bipolar series gear pump in this embodiment, the liquid can be output at a higher pressure and flow rate after double pressurization, ensuring that the tool obtains sufficient cooling and lubrication under high-speed rotation and high-temperature environment, thereby improving the machining accuracy and tool life.

[0038] Through the detailed description of the above embodiments, those skilled in the art can understand and implement the technical solutions of the present invention. The design principle of this embodiment is based on the structural characteristics of the internal gear pump, and realizes the secondary pressurized pumping of liquid through the bipolar series connection method, which has the advantages of compact structure and high pumping efficiency.

[0039] In practical applications, the bipolar series gear pump of this embodiment can be used for the pressurized transmission of various fluids, such as oils, chemical liquids, etc., and has a wide range of application prospects. Compared with the prior art, this embodiment realizes the stable and efficient pumping of liquid through the design of double modules, and through the sealing design, ensures no leakage during the pumping process, improving the reliability and service life of the equipment.

[0040] In addition, the present invention can also adjust the design of the module according to different requirements, such as changing the size ratio of the inner rotor 11 and the outer rotor 10, the shape of the crescent plate 9, etc., to adapt to the transmission requirements of different liquids. The above is only the preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes and improvements made according to the claims of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bipolar series gear pump, characterized in that, Comprising: A base, an end cover, a first module and a second module located between the base and the end cover, and a drive shaft for driving the first module and the second module. Among them, the base, the first module, the second module, and the end cover are stacked in sequence and then locked into one body by a locking rod connecting the base and the end cover; both the first module and the second module are involute internal meshing gear pumping structures, and an oil suction chamber and an oil pressure chamber are provided in both the first module and the second module; the oil pressure chamber in the first module is in alignment and communication with the oil suction chamber in the second module, and the second module performs secondary pressurized pumping on the liquid sent by the first module.

2. A bipolar series gear pump as described in claim 1, characterized in that: The first module and the second module have the same structure, and both include a fixed block recessed with a circular groove, a crescent plate erected in the circular groove, an outer rotor rotatably installed in the circular groove and suitable for the size of the circular groove, and an inner rotor installed in the outer rotor and eccentrically arranged and partially meshed with the outer rotor; the inner rotor is in alignment and cooperation with the crescent plate, and an oil pressure chamber and an oil suction chamber are respectively formed on both sides of the crescent plate; the inner rotors in the first module and the second module are both sleeved on the drive shaft and driven to rotate by the drive shaft.

3. A bipolar series gear pump as described in claim 2, characterized in that: The fixed block in the first module and the fixed block in the second module cooperate to seal the circular groove to form a first working chamber; the fixed block in the second module and the end cover cooperate to seal the circular groove to form a second working chamber.

4. A bipolar series gear pump as described in claim 1, characterized in that: A sealed bearing for the installation of the drive shaft is provided in the base.

5. A bipolar series gear pump as described in claim 1, characterized in that: Sealing cooperation is achieved between the fixed blocks in the first module and the second module through at least one sealing ring.

6. A bipolar series gear pump as described in claim 1, characterized in that: A liquid inlet communicating and cooperating with the oil suction chamber in the first module is provided in the base.

7. A bipolar series gear pump as described in claim 1, characterized in that: A liquid outlet communicating and cooperating with the oil pressure chamber in the second module is provided in the end cover.

8. A bipolar series gear pump as described in claim 2, characterized in that: The inner rotor is an internal gear ring, and the inner rotor is a gear meshing with the internal gear ring; the meshing positions of the crescent plate with the inner and outer rotors are opposite.

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