A low-noise gear pump with adjustable pressure

Abstract

This invention relates to the field of gear pump technology and discloses a low-noise gear pump with adjustable pressure. The gear housing has interface seats on both sides, with discharge and inlet ports respectively. Internally, there is a gear cavity, with a front cover seat at the front end and a rear cover seat at the rear end; both have sealing grooves on their inner walls. The front cover seat has a column opening through which a drive column passes, and a lower gear is mounted on the column, located within the gear cavity. Above the lower gear is a transmission column, on which an upper gear is mounted, and the upper and lower gears mesh. Through the design of the flow control mechanism, operating noise is effectively reduced without changing the overall pump structure, and the output pressure can be quickly adjusted according to different working environments and requirements. This design not only simplifies the adjustment process and improves response speed, but also reduces manufacturing costs due to its optimized structure, while ensuring pump performance and reliability.

Description

Technical Field

[0001] This invention relates to the field of gear pump technology, specifically to a low-noise gear pump with adjustable pressure. Background Technology

[0002] Gear pumps, a common type of hydraulic pump, are widely used in various hydraulic systems. Their working principle involves the change in working volume created by the rotation of two meshing gears to transport fluid. However, traditional gear pumps often generate significant noise during operation, primarily due to the pulsating pressure and hydrodynamic noise produced by the meshing gears. Furthermore, due to the diversity of working environments and application requirements, the output pressure of traditional gear pumps is usually fixed, making it difficult to adapt to different working conditions.

[0003] To reduce noise, various methods have been explored in existing technologies, such as improving gear geometry, using damping materials, and optimizing the pump's internal flow channel design. However, these methods often require significant modifications to the overall pump structure, increasing manufacturing costs and potentially affecting pump performance and reliability. Meanwhile, regarding pressure regulation, although adjustable gear pumps exist on the market, these pumps are typically complex in structure, cumbersome in adjustment, and slow in response, making them unsuitable for rapidly changing operating conditions.

[0004] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a low-noise gear pump with adjustable pressure. Summary of the Invention

[0005] The purpose of this invention is to provide a low-noise gear pump with adjustable pressure to solve the common problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-noise gear pump with adjustable pressure, comprising a gear housing, with interface seats throughly disposed on both sides of the gear housing, the two interface seats respectively provided with a drain port and a liquid inlet port, a gear cavity disposed inside the gear housing, a front cover seat installed at the front end of the gear housing, a column opening throughly disposed on the front cover seat, a rear cover seat installed at the rear end of the gear housing, sealing grooves disposed on the inner walls of the front cover seat and the rear cover seat respectively, a column opening throughly disposed on the front cover seat, a drive column passing through the column opening, a lower gear mounted on the drive column, the lower gear being located in the gear cavity, a transmission column disposed above the lower gear, an upper gear mounted on the transmission column, the upper gear meshing with the lower gear;

[0007] A flow control seat is installed outside the liquid inlet, and a flow control mechanism is installed inside the flow control seat. The flow control mechanism includes a rear ring plate and a front ring plate. The inner wall of the rear ring plate is provided with several guide grooves along the circumferential direction of the ring opening. The front ring plate is provided with several guide ports through the circumferential direction of the ring opening. The guide ports correspond one-to-one with the guide grooves. Several control plates are provided between the front ring plate and the rear ring plate. The control plates are arranged in a circumferential shape. Each control plate has a guide post head installed at its front end and a guide strip installed at its rear end. The guide post head extends into the guide port and is slidably connected thereto. The guide strip extends into the guide groove and is also slidably connected thereto.

[0008] As a preferred technical solution, the sides of adjacent control plates are precisely fitted together to facilitate synchronous linkage of several control plates, and the rear ring plates are all rotatably connected to the flow control seat.

[0009] As a preferred technical solution, a micro motor is installed inside the flow control seat, the output end of the micro motor is connected to a bevel gear, and a bevel gear ring is installed on the back of the rear ring plate, with the bevel gear meshing with the bevel gear ring.

[0010] As a preferred technical solution, the front cover seat has fixing recesses on both sides for fixing, a bushing is provided between the drive column and the column opening, and a spline assembly port is provided at the outer end of the drive column for connecting power equipment.

[0011] As a preferred technical solution, a sealing ring is installed in the sealing groove, and a positioning sleeve is fitted on the outside of the drive column and the transmission column and is rotatably connected to them. The positioning sleeve is installed in the front cover seat and the rear cover seat.

[0012] As a preferred technical solution, a side baffle is installed inside the front cover seat and the rear cover seat, and two through holes are provided on the side baffle, and the positioning pin sleeve is inserted into the through holes.

[0013] As a preferred technical solution, a through hole is provided at the corner of the gear housing, and stud openings are provided at the same position at the corners of the front cover and the rear cover. A stud is installed through the stud opening and the through hole, and a washer is fitted on the stud.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention relates to an adjustable pressure, low-noise gear pump. Through a flow control mechanism design, it effectively reduces operating noise without altering the overall pump structure and allows for rapid adjustment of output pressure according to different working environments and requirements. This design not only simplifies the adjustment process and improves response speed but also reduces manufacturing costs due to its optimized structure, while ensuring pump performance and reliability.

[0016] By utilizing the movement of the rear ring plate, multiple control plates are synchronously linked and cooperate with the guide port and guide groove to achieve axial opening and closing control of multiple control plates, thereby regulating the fluid flow rate and achieving precise pressure control. The introduction of a micro motor makes flow control more automated and intelligent. Users can adjust the pump's output pressure through simple operation according to actual needs to meet rapidly changing working conditions.

[0017] Furthermore, this invention employs a combination of sealing rings and positioning sleeves to ensure the sealing performance and stability of the gear pump during operation. The side baffle further enhances the structural strength of the gear pump, guaranteeing reliable operation under high-pressure conditions.

[0018] This invention provides a low-noise gear pump with adjustable pressure that is simple in structure, easy to adjust, low in noise, and reliable in performance. It effectively solves the technical problems of noise and pressure regulation in traditional gear pumps and has broad application prospects. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a low-noise gear pump with adjustable pressure;

[0020] Figure 2 A schematic diagram of the structure of a low-noise gear pump with adjustable pressure from an explosion perspective.

[0021] Figure 3 This is a schematic diagram of the gear cavity structure in a low-noise gear pump with adjustable pressure.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the gear cavity in a low-noise gear pump with adjustable pressure.

[0023] Figure 5 A schematic diagram of the flow control mechanism in a low-noise gear pump with adjustable pressure;

[0024] Figure 6 A schematic diagram showing the disassembled structure of the flow control mechanism in a low-noise gear pump with adjustable pressure;

[0025] Figure 7 A schematic diagram of the back structure of the control plate in a low-noise gear pump with adjustable pressure;

[0026] Figure 8 This is a schematic diagram of the drive structure in a low-noise gear pump with adjustable pressure.

[0027] In the attached diagram, the following are the reference numerals: 11. Gear housing; 12. Interface seat; 13. Drainage port; 14. Inlet port; 15. Gear cavity; 16. Through hole; 21. Front cover seat; 22. Fixing recess; 23. Column opening; 24. Rear cover seat; 25. Sealing groove; 26. Threaded stud opening; 27. Threaded stud; 28. Gasket; 29. ​​Sealing ring; 31. Drive column; 32. Lower gear; 33. Spline assembly port; 34. Bushing; 35. Transmission column; 36. Upper gear; 37. Positioning column sleeve; 38. Side baffle; 39. Through opening; 4. Flow control seat; 41. Rear ring plate; 411. Guide groove; 42. Front ring plate; 421. Guide opening; 43. Control plate; 44. Guide column head; 45. Guide strip; 46. Micro motor; 47. Bevel gear; 48. Bevel gear ring. Detailed Implementation

[0028] 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.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0030] Example

[0031] Please see Figure 1-8 As shown, this invention provides a low-noise gear pump with adjustable pressure: it includes a gear housing 11, with interface seats 12 extending through both sides of the gear housing 11. Each interface seat 12 is provided with a drain port 13 and a feed port 14. A gear cavity 15 is formed inside the gear housing 11 to accommodate the gear transmission system. A front cover seat 21 is installed at the front end of the gear housing 11, and a rear cover seat 24 is installed at the rear end. Sealing grooves 25 are respectively provided on the opposing inner walls of the front cover seat 21 and the rear cover seat 24 to ensure the sealing of the gear cavity 15.

[0032] A through-hole 23 is provided on the front cover 21, and a drive column 31 passes through the through-hole 23. A lower gear 32 is mounted on the drive column 31 and is located in the gear cavity 15. A transmission column 35 is provided above the lower gear 32, and an upper gear 36 is mounted on the transmission column 35. The upper gear 36 meshes with the lower gear 32 to form a meshing gear pair for transmitting power.

[0033] A flow control seat 4 is installed outside the liquid inlet 14, and a flow control mechanism is installed inside the flow control seat 4. The flow control mechanism includes a rear ring plate 41 and a front ring plate 42. The inner wall of the rear ring plate 41 has several guide grooves 411 arranged along the circumference of the ring opening, and the front ring plate 42 has several guide ports 421 extending through it along the circumference of the ring opening, with each guide port 421 corresponding to a guide groove 411. Several control plates 43 are arranged circumferentially between the front ring plate 41 and the rear ring plate 42. Each control plate 43 has a guide post 44 installed at its front end and a guide strip 45 installed at its rear end. The guide post 44 extends into the guide port 421 and is slidably connected thereto, and the guide strip 45 extends into the guide groove 411 and is also slidably connected thereto. This structural design allows the flow control mechanism to adjust the flow rate through the liquid inlet 14 as needed.

[0034] The adjacent control plates 43 are precisely fitted together, ensuring seamless synchronous operation. This precise fit not only improves the response speed of the control plates 43 but also enhances the stability and reliability of the overall system. The rotatable connection between the rear ring plate 41 and the flow control seat 4 allows the entire device to be flexibly adjusted during operation to adapt to different flow requirements. This rotatable connection allows the rear ring plate 41 to rotate freely within a certain range, thereby achieving precise flow control. Overall, this design not only optimizes the collaborative work between the control plates 43 and the rear ring plate 41 but also improves the performance and efficiency of the entire system.

[0035] The flow control unit 4 houses a micro motor 46, the output of which is connected to a bevel gear 47 via a drive shaft. The micro motor 46 provides power, and precise control of its speed and direction of rotation allows for fine-tuning of the flow rate. The bevel gear 47, a small gear with umbrella-shaped teeth, is mounted at the end of the drive shaft and meshes with a bevel gear ring 48.

[0036] The rear ring plate 41 is part of the flow control device, and a bevel ring 48 is mounted on its back. The bevel ring 48 is a gear ring that matches the bevel gear 47, and its inner side has teeth that mesh with the bevel gear 47. When the micro motor 46 is started, the bevel gear 47 rotates accordingly, and this rotational motion is transmitted to the bevel ring 48 due to the meshing of the bevel gear 47 and the bevel ring 48.

[0037] The front cover 21 has fixing recesses 22 on both sides for securing it. These recesses are designed to ensure a stable connection between the front cover and other components, allowing it to withstand various forces and vibrations during operation. A bushing 34 is provided between the drive column 31 and the column opening 23. The bushing 34 reduces friction and improves the flexibility and durability of the rotating components. The bushing 34 is typically made of wear-resistant material to ensure good performance during long-term operation. Furthermore, the outer end of the drive column 31 has a splined mounting opening 33, a structure with multiple parallel key teeth that allows for precise connection between the drive column and the output shaft of power equipment such as a motor or engine. This connection method not only transmits torque but also ensures the concentricity between the power equipment and the drive column, thereby guaranteeing the efficient and stable operation of the entire transmission system.

[0038] The sealing groove 25 contains a sealing ring 29, which is typically made of rubber or other elastic materials and effectively prevents leakage of liquids or gases. The installation position and size of the sealing ring 29 must be precise to ensure a tight fit and achieve optimal sealing performance.

[0039] The drive column 31 and transmission column 35 are important components for transmitting power in the mechanical device. Each is fitted with a positioning sleeve 37. These sleeves not only serve a positioning function but also protect the drive column and transmission column from external environmental influences such as dust and moisture. They also reduce friction and extend the service life of the components. The positioning sleeve 37 is rotatably connected to the drive column 31 and transmission column 35, meaning they can rotate relative to each other. This design allows power to be transmitted between different components while maintaining the stability and precision of the components.

[0040] Positioning pin sleeves 37 are installed inside the front cover seat 21 and the rear cover seat 24. These two covers are fixed parts of the mechanical device, providing structural support for the entire device and are typically used to fix and protect the internal mechanical components.

[0041] Side baffles 38 are installed inside the front cover seat 21 and the rear cover seat 24. These side baffles 38 are ingeniously designed, featuring two through-holes 39. These through-holes 39 not only enhance the unique appearance of the side baffles 38 but also play a crucial role in practical application. The position and size of the through-holes 39 are carefully calculated to ensure a perfect fit for the insertion of the positioning post sleeve 37.

[0042] The positioning sleeve 37, inserted into the through-hole 39, serves to position and fix the device. The insertion of the positioning sleeve 37 not only ensures the stability of the side baffle 38 but also prevents unnecessary movement or detachment during use. This design makes the entire structure more robust and also improves the product's durability and reliability.

[0043] In addition, the combined use of the side baffle 38 and the positioning column sleeve 37 can effectively protect the internal components and prevent dust, dirt or other foreign objects from entering, thereby ensuring the normal operation and service life of the equipment.

[0044] The gear housing 11 has a through hole 16 at one corner, and the front cover 21 and rear cover 24 have stud openings 26 at the same positions at their corners. A stud 27 is installed through both the stud opening 26 and the through hole 16, and a washer 28 is fitted onto the stud 27. The stud 27 is a common fastener that passes through the through hole 16 of the gear housing 11 and the stud openings 26 of the front and rear covers, thus firmly connecting these components together. To improve the reliability of the connection and reduce wear, a washer 28 is fitted onto the stud 27. The washer 28 is a flat washer whose function is to distribute pressure, prevent the stud 27 from directly acting on the metal surface and causing damage, and also to fill in minor unevenness between the connected components, ensuring a tight and airtight connection.

[0045] The working principle and usage of this invention: The drive column 31 is connected to the output shaft of a power device such as a motor or engine through the spline mounting port 33, ensuring the transmission of power. When the motor starts, the power is transmitted to the drive column 31 through the spline mounting port 33, thereby driving the gears inside the gear housing 11 to rotate.

[0046] As the core component of flow regulation, the micro motor 46 precisely controls the rotation of the bevel gear 47 by controlling its speed and direction of rotation, thereby affecting the movement of the bevel ring 48. The meshing of the bevel ring 48 with the bevel gear 47 then drives the movement of the control plate 43. Due to the precise cooperation between the control plate 43, the guide post head 44, and the guide strip 45, the flow control mechanism can adjust the flow rate through the liquid inlet 14 as needed.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0048] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limiting this invention.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise gear pump with adjustable pressure, characterized in that, The gear housing includes a gear housing (11), on both sides of which are provided interface seats (12). The two interface seats (12) are respectively provided with a drain port (13) and a liquid inlet port (14). A gear cavity (15) is provided inside the gear housing (11). A front cover seat (21) is installed at the front end of the gear housing (11). A column opening (23) is provided through the front cover seat (21). A rear cover seat (24) is installed at the rear end of the gear housing (11). The front cover seat (21) and the rear cover seat are connected. (24) A sealing groove (25) is provided on the inner wall. A column opening (23) is provided through the front cover seat (21). A drive column (31) is connected through the column opening (23). A lower gear (32) is installed on the drive column (31). The lower gear (32) is located in the gear cavity (15). A transmission column (35) is provided above the lower gear (32). An upper gear (36) is installed on the transmission column (35). The upper gear (36) meshes with the lower gear (32). A flow control seat (4) is installed outside the liquid inlet (14). A flow control mechanism is installed inside the flow control seat (4). The flow control mechanism includes a rear ring plate (41) and a front ring plate (42). A number of guide grooves (411) are provided on the inner wall of the rear ring plate (41) along the circumferential direction of the ring opening. A number of guide ports (421) are provided through the front ring plate (42) along the circumferential direction of the ring opening. The number of guide ports (421) corresponds one-to-one with the guide grooves (411). A number of control pieces (43) are provided between the front ring plate (42) and the rear ring plate (41). The number of control pieces (43) are arranged in a circular shape. A guide post (44) is installed at the front end of each control piece (43), and a guide strip (45) is installed at the rear end. The guide post (44) extends into the guide port (421) and is slidably connected to it. The guide strip (45) extends into the guide groove (411) and is also slidably connected to it. The sides of adjacent control plates (43) are precisely fitted together so that several control plates (43) can be linked synchronously. The rear ring plate (41) is rotatably connected to the flow control seat (4). A micro motor (46) is installed inside the flow control seat (4). The output end of the micro motor (46) is connected to a bevel gear (47). A bevel ring (48) is installed on the back of the rear ring plate (41). The bevel gear (47) and the bevel ring (48) are meshed together.

2. The adjustable pressure, low-noise gear pump according to claim 1, characterized in that: The front cover (21) has fixing recesses (22) on both sides for fixing. A bushing (34) is provided between the drive column (31) and the column opening (23). The outer end of the drive column (31) is provided with a spline assembly opening (33) for connecting power equipment.

3. The adjustable pressure, low-noise gear pump according to claim 2, characterized in that: A sealing ring (29) is installed in the sealing groove (25). A positioning sleeve (37) is fitted on the outside of the drive column (31) and the transmission column (35) and is rotatably connected to them. The positioning sleeve (37) is installed in the front cover seat (21) and the rear cover seat (24).

4. The adjustable pressure, low-noise gear pump according to claim 3, characterized in that: Side baffles (38) are installed in the front cover seat (21) and the rear cover seat (24), and two through holes (39) are provided on the side baffles (38), and the positioning pin sleeve (37) is inserted into the through holes (39).

5. The adjustable pressure, low-noise gear pump according to claim 1, characterized in that: A through hole (16) is provided at the corner of the gear housing (11). A stud opening (26) is provided at the same position at the corner of the front cover (21) and the rear cover (24). A stud (27) is installed through the stud opening (26) and the through hole (16), and a washer (28) is fitted on the stud (27).

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