Internal gear pump capable of reducing sound and noise

Abstract

The utility model relates to a sound-reducing and noise-reducing internal gear pump which comprises a gear pump body and an end cover, an outer rotor and an inner rotor are rotatably mounted in an inner cavity of the gear pump body, a crescent plate is clamped between the inner rotor and the outer rotor, and two pipe thread through holes for introducing other liquid to cool the rotors are formed in the end cover; one side and the top end of the gear pump body communicate with a water inlet pipe and a water outlet pipe correspondingly, and one side of the top end of the water inlet pipe communicates with an exhaust mechanism. Through the arrangement of the crescent plate, vibration and noise generated in the working process can be reduced through the crescent plate; according to the gear pump, the exhaust mechanism is arranged, so that the situation that gas enters the inner cavity of the gear pump body along with liquid, and when the gear pump body conveys the liquid, pressure pulsation and noise are generated due to non-uniformity of flow is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of gear pumps, and in particular to an internal gear pump capable of reducing noise. Background Art

[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume created between the pump cylinder and meshing gears to transport liquids or increase their pressure. It consists of two gears, a pump body, and front and rear covers forming two enclosed spaces. The rotation of the gears enables the suction and discharge of liquids.

[0003] Common internal gear pumps utilize the principle of internal meshing gears, with the inner and outer gear pitch circles close together on one side, separated by a "crescent plate" on the pump cover. However, existing internal gear pumps are susceptible to air bubbles being drawn into the pump body during use. This results in uneven flow rates when pumping liquids, leading to pressure pulsation and noise. Therefore, those skilled in the art have provided a noise-reducing internal gear pump to address the issues raised in the background art. Summary of the Invention

[0004] The purpose of the utility model is to provide an internal gear pump with reduced noise, so as to solve the problem raised in the above background technology that the existing internal gear pump is easy to absorb bubbles into the pump body during use, which makes the internal gear pump produce pressure pulsation and noise due to the uneven flow rate when conveying liquid.

[0005] The present application provides an internal gear pump with reduced noise, which adopts the following technical solution:

[0006] A noise-reducing internal gear pump comprises a gear pump body and an end cover, wherein an outer rotor and an inner rotor are rotatably mounted in the internal cavity of the gear pump body, a crescent plate is sandwiched between the inner rotor and the outer rotor, and the end cover is provided with two pipe threaded through holes for passing other liquids to cool the rotors, one side and the top end of the gear pump body are connected and installed with a water inlet pipe and a water outlet pipe respectively, and one side of the top end of the water inlet pipe is connected and installed with an exhaust mechanism; the exhaust mechanism comprises a connecting pipe, the top end of the connecting pipe is connected and installed with an exhaust pipe, the top end of the exhaust pipe is connected and installed with an outlet pipe, a float is movably installed in the exhaust pipe, the top end of the float is installed with a telescopic pipe, and the top end of the telescopic pipe is installed in the outlet pipe.

[0007] Preferably, limiting rods are fixedly installed on both sides of the exhaust pipe, movable grooves are opened on both sides of the float, the two limiting rods are respectively arranged in the two movable grooves, and the float is movably connected to the two limiting rods.

[0008] Preferably, the telescopic tube includes a main rod and a movable rod, the movable rod is movably sleeved in the main rod, a first air outlet is opened on one side of the main rod, and a second air outlet is opened on one side of the movable rod.

[0009] Preferably, the first air outlet is arranged at the bottom of one side of the main rod, and the second air outlet is arranged at the top of one side of the movable rod, and the first air outlet and the second air outlet are arranged in correspondence with each other.

[0010] Preferably, the bottom of the air outlet pipe is truncated into a cone shape, and the bottom of the air outlet pipe is wide at the top and narrow at the bottom. The bottom of the main rod is fixedly connected to the bottom end of the air outlet pipe, and the top of the main rod is fixedly connected to the top inside the air outlet pipe.

[0011] Preferably, exhaust holes are provided around the top of the exhaust pipe.

[0012] Preferably, the outer rotor and the inner rotor are meshed with each other, and one side of the outer rotor and the inner rotor are respectively in contact with two sides of the crescent plate.

[0013] Preferably, a first shaft sleeve and a second shaft sleeve of an oil guide groove are provided on the inner sides of the inner rotor and the outer rotor.

[0014] Preferably, a shaft sleeve frame and a bracket are installed on one side of the gear pump, both the shaft sleeve frame and the bracket are provided with through holes, and a cooling cavity is formed between the shaft sleeve frame and the bracket.

[0015] In summary, this application has the following beneficial technical effects:

[0016] The crescent plate is set to separate the oil suction chamber from the oil pressure chamber to prevent the pressure oil from leaking to the oil suction side. The crescent plate also plays the role of improving fluid sealing, reducing leakage and balancing pressure. By improving the fluid sealing of the pump, reducing leakage and balancing pressure, the crescent plate can reduce the vibration and noise generated by the pump during operation;

[0017] The exhaust mechanism is designed to utilize the difference between gas and liquid, causing the gas to move upward along the pipe, allowing the gas entering the water inlet pipe to move into the exhaust pipe. At the same time, water entering the exhaust pipe can push the float upward, causing the first air outlet to gradually overlap with the second air outlet, allowing the gas to enter the outlet pipe and finally be discharged through the exhaust hole. After the float rises to a certain height, the first air outlet and the second air outlet are staggered, making the telescopic tube sealed and preventing liquid from being discharged. This prevents gas from following the liquid into the inner cavity of the gear pump body, which would cause pressure pulsation and noise due to uneven flow when the gear pump body transports liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a front cross-sectional view of an internal gear pump with reduced noise according to an embodiment of the present application;

[0020] Figure 2 This is a side sectional view of a noise-reducing internal gear pump according to an embodiment of the present application;

[0021] Figure 3 This is a front cross-sectional view of an exhaust mechanism of an internal gear pump with reduced noise in an embodiment of the present application;

[0022] Figure 4 It is a front cross-sectional view of a telescopic tube of an internal gear pump with reduced noise in an embodiment of the present application.

[0023] Explanation of the accompanying symbols: 1. Gear pump body; 2. End cover; 3. Outer rotor; 4. Inner rotor; 5. Crescent plate; 6. Water inlet pipe; 7. Water outlet pipe; 8. Connecting pipe; 9. Exhaust pipe; 10. Exhaust pipe; 11. Float; 12. Limit rod; 13. Movable groove; 14. Main rod; 15. Moving rod; 16. First air outlet; 17. Second air outlet; 18. Exhaust hole; 19. First shaft sleeve; 20. Second shaft sleeve; 21. Shaft sleeve frame; 22. Bracket. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] The embodiment of the present application discloses an internal gear pump with reduced noise, referring to Figure 1-4 , including a gear pump body 1 and an end cover 2, an outer rotor 3 and an inner rotor 4 are rotatably installed in the internal cavity of the gear pump body 1, a crescent plate 5 is sandwiched between the inner rotor 4 and the outer rotor 3, and two pipe threaded through holes are provided on the end cover 2 for introducing other liquids to cool the rotors. A water inlet pipe 6 and a water outlet pipe 7 are respectively connected and installed on one side and the top of the gear pump body 1, and an exhaust mechanism is connected and installed on one side of the top of the water inlet pipe 6; the exhaust mechanism includes a connecting pipe 8, the top of the connecting pipe 8 is connected and installed with an exhaust pipe 9, the top of the exhaust pipe 9 is connected and installed with an outlet pipe 10, a float 11 is movably installed in the exhaust pipe 9, the top of the float 11 is installed with a telescopic tube, and the top of the telescopic tube is installed in the outlet pipe 10.

[0028] By adopting the above technical solution, the utility model sets a crescent plate 5, which separates the oil suction chamber and the oil pressure chamber to prevent the pressure oil from leaking to the oil suction side. The crescent plate 5 also plays the role of improving fluid sealing, reducing leakage and balancing pressure. By improving the fluid sealing of the pump, reducing leakage and balancing pressure, the crescent plate 5 can reduce the vibration and noise generated by the pump during operation; and through the exhaust mechanism set up, the gas will move upward along the pipeline compared with the liquid, so that the gas entering the water inlet pipe 6 can move to the exhaust pipe 9. At the same time, the water entering the exhaust pipe 9 can push the float 11 upward, so that the first air outlet 16 gradually corresponds to the second air outlet 17 and overlaps with each other, so that the gas can enter the outlet pipe 10 and finally be discharged through the exhaust hole 18. After the float 11 floats to a certain height, the first air outlet 16 and the second air outlet 17 are staggered with each other, so that the telescopic tube is sealed, preventing the liquid from being discharged. This prevents gas from following the liquid into the inner cavity of the gear pump body 1 , which would cause pressure pulsation and noise to be generated due to the uneven flow rate when the gear pump body 1 is conveying the liquid.

[0029] Reference Figure 1-4 Limit rods 12 are fixedly installed on both sides of the exhaust pipe 9, and movable grooves 13 are opened on both sides of the float 11. The two limit rods 12 are respectively arranged in the two movable grooves 13, and the float 11 is movably connected to the two limit rods 12.

[0030] By adopting the above technical solution, the provided limiting rod 12 can prevent the float 11 from rotating during the floating process, so that the first air outlet 16 and the second air outlet 17 will never overlap.

[0031] Reference Figure 1-4 The telescopic tube includes a main rod 14 and a movable rod 15. The movable rod 15 is movably sleeved in the main rod 14. A first air outlet 16 is opened on one side of the main rod 14, and a second air outlet 17 is opened on one side of the movable rod 15.

[0032] By adopting the above technical solution, the gas can enter the gas outlet pipe 10 through the first gas outlet hole 16 and the second gas outlet hole 17 when they overlap with each other, so that the gas can be discharged conveniently.

[0033] Reference Figure 1-4 The first air outlet 16 is arranged at the bottom of one side of the main rod 14, and the second air outlet 17 is arranged at the top of one side of the movable rod 15, and the first air outlet 16 and the second air outlet 17 are arranged correspondingly.

[0034] By adopting the above technical solution, after the float 11 floats to a certain height, the first air outlet 16 and the second air outlet 17 are staggered with each other, so that the telescopic tube is sealed to prevent liquid from being discharged.

[0035] Reference Figure 1-4 The bottom of the outlet pipe 10 is set in a truncated cone shape, and the bottom of the outlet pipe 10 is set to be wide at the top and narrow at the bottom. The bottom of the main rod 14 is fixedly connected to the bottom end of the outlet pipe 10, and the top of the main rod 14 is fixedly connected to the top inside the outlet pipe 10.

[0036] By adopting the above technical solution and setting the air outlet pipe 10 in a frustum shape, it is convenient for gas to enter the cavity between the air outlet pipe 10 and the main rod 14, thereby facilitating exhaust.

[0037] Reference Figure 1-4 Exhaust holes 18 are provided around the top of the exhaust pipe 10.

[0038] By adopting the above technical solution, when the first air outlet 16 and the second air outlet 17 overlap with each other, the gas can enter the cavity between the air outlet pipe 10 and the main rod 14, and then be exhausted through the exhaust hole 18.

[0039] Reference Figure 1-4 The outer rotor 3 and the inner rotor 4 are meshed with each other, and one side of the outer rotor 3 and the inner rotor 4 are respectively in contact with the two sides of the crescent plate 5.

[0040] By adopting the above technical solution, the crescent plate 5 can improve the fluid sealing, reduce leakage, and balance the pressure. By improving the fluid sealing, reducing leakage and balancing the pressure of the gear pump body 1, the crescent plate 5 can reduce the vibration and noise generated by the gear pump body 1 during operation.

[0041] Reference Figure 1-4 A first shaft sleeve 19 and a second shaft sleeve 20 of an oil guide groove are provided on the inner side of the inner rotor 4 and the outer rotor 3.

[0042] By adopting the above technical solution, an oil film can be formed on the oil guide groove to protect the first sleeve 19 and the second sleeve 20, reduce friction, and extend the service life of the first sleeve 19 and the second sleeve 20. Reasonable use of the oil guide groove can reduce the noise generated by friction vibration of the gear pump body 1.

[0043] Reference Figure 1-4 A shaft sleeve frame 21 and a bracket 22 are installed on one side of the gear pump. Through holes are opened on the shaft sleeve frame 21 and the bracket 22, and a cooling cavity is formed between the shaft sleeve frame 21 and the bracket 22.

[0044] By adopting the above technical solution, a through hole is set on the sleeve frame 21, so that the medium can pass through the cooling filler or seal. The through hole is set on the bracket 22, and a cooling cavity is formed between the bracket 22 and the sleeve frame 21, so that cooling liquid can be introduced to cool the gear pump body 1.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0046] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A noise-reducing internal gear pump, comprising a gear pump body (1) and an end cover (2), characterized in that: An outer rotor (3) and an inner rotor (4) are rotatably mounted in the internal cavity of the gear pump body (1), a crescent plate (5) is sandwiched between the inner rotor (4) and the outer rotor (3), two pipe threaded through holes for introducing other liquids to cool the rotors are provided on the end cover (2), a water inlet pipe (6) and a water outlet pipe (7) are connected to one side and the top end of the gear pump body (1), respectively, and an exhaust mechanism is connected to one side of the top end of the water inlet pipe (6); The exhaust mechanism comprises a connecting pipe (8), the top end of the connecting pipe (8) is connected to an exhaust pipe (9), the top end of the exhaust pipe (9) is connected to an outlet pipe (10), a float (11) is movably installed in the exhaust pipe (9), a telescopic pipe is installed at the top end of the float (11), and the top end of the telescopic pipe is installed in the outlet pipe (10).

2. The noise-reducing internal gear pump according to claim 1, characterized in that: Limit rods (12) are fixedly installed on both sides of the exhaust pipe (9), movable grooves (13) are opened on both sides of the float (11), and the two limit rods (12) are respectively arranged in the two movable grooves (13), and the float (11) is movably connected to the two limit rods (12).

3. The noise-reducing internal gear pump according to claim 1, characterized in that: The telescopic tube comprises a main rod (14) and a movable rod (15), wherein the movable rod (15) is movably sleeved in the main rod (14), a first air outlet (16) is provided on one side of the main rod (14), and a second air outlet (17) is provided on one side of the movable rod (15).

4. The noise-reducing internal gear pump according to claim 3, characterized in that: The first air outlet (16) is arranged at the bottom of one side of the main rod (14), and the second air outlet (17) is arranged at the top of one side of the movable rod (15), and the first air outlet (16) and the second air outlet (17) are arranged in a corresponding manner.

5. The noise-reducing internal gear pump according to claim 3, characterized in that: The bottom of the air outlet pipe (10) is arranged in a truncated cone shape, and the bottom of the air outlet pipe (10) is arranged to be wide at the top and narrow at the bottom. The bottom of the main rod (14) is fixedly connected to the bottom end of the air outlet pipe (10), and the top end of the main rod (14) is fixedly connected to the top end inside the air outlet pipe (10).

6. The noise-reducing internal gear pump according to claim 1, characterized in that: Exhaust holes (18) are provided on all four sides of the top of the exhaust pipe (10).

7. The noise-reducing internal gear pump according to claim 1, characterized in that: The outer rotor (3) and the inner rotor (4) are meshed with each other, and one side of the outer rotor (3) and the inner rotor (4) are respectively in contact with two sides of the crescent plate (5).

8. The noise-reducing internal gear pump according to claim 1, characterized in that: A first shaft sleeve (19) and a second shaft sleeve (20) with oil guide grooves are provided on the inner sides of the inner rotor (4) and the outer rotor (3).

9. The noise-reducing internal gear pump according to claim 1, characterized in that: A shaft sleeve frame (21) and a bracket (22) are installed on one side of the gear pump. Through holes are opened on the shaft sleeve frame (21) and the bracket (22), and a cooling cavity is formed between the shaft sleeve frame (21) and the bracket (22).

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