A water pump noise reduction structure

Abstract

The utility model belongs to the technical field of water pump, especially point to a water pump noise reduction structure, include: drive motor, have the impeller through drive motor rotation drive, pump head, pump head has low pressure chamber, mixing chamber and high pressure chamber, be equipped with impeller in mixing chamber, be equipped with first water pass between mixing chamber and low pressure chamber, be equipped with second water pass between mixing chamber and high pressure chamber, guide block, it can be detachably fixed on second water pass, be equipped with guide surface for being contacted with water flow on guide block. This patent reduces the manufacturing difficulty of water pump head through detachable guide block, and the guide block that is separately taken out can be processed independently, can be customized into the shape that has better noise reduction effect, or the surface is polished more smooth, to increase the noise reduction effect.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a water pump noise reduction structure. Background Technology

[0002] As disclosed in Chinese Utility Model No. 2021233049300, a self-priming pump that can effectively reduce noise includes a pump body with ribs. The ribs divide the main body into a suction chamber, a self-priming chamber, and an acceleration chamber connecting the suction chamber and the self-priming chamber. An impeller is provided in the acceleration chamber. An outlet flow channel connecting the acceleration chamber and the self-priming chamber and an inlet channel connecting the acceleration chamber and the suction chamber are formed between the ribs and the inner wall of the main body. A flared and narrow opening structure is provided on one side of the outlet channel. By changing the shape of the outlet channel through this structure, the noise reduction effect is achieved.

[0003] However, the pump body of existing self-priming pumps is formed as a single piece through casting, and the liquid outlet channel is formed at the same time as the pump body. In the actual casting process, due to manufacturing precision issues, the surface of the liquid outlet channel may be rough, and its shape and size may have errors, thus affecting the noise reduction effect. Summary of the Invention

[0004] The purpose of this invention is to provide a water pump noise reduction structure that effectively increases noise reduction effect.

[0005] The purpose of this utility model is achieved as follows:

[0006] A water pump noise reduction structure includes:

[0007] A drive motor rotates to drive an impeller.

[0008] The pump head has a low-pressure chamber, a mixing chamber and a high-pressure chamber. The impeller is provided in the mixing chamber. A first water inlet is provided between the mixing chamber and the low-pressure chamber. A second water inlet is provided between the mixing chamber and the high-pressure chamber.

[0009] A flow guide block is detachably fixed to the second water outlet, and the flow guide block is provided with a flow guide surface for contacting the water flow.

[0010] Furthermore, the pump head includes at least an inlet housing, a mixing housing connected to one axial side of the inlet housing, an outlet housing connected to the outside of the mixing housing, a low-pressure chamber formed in the inlet housing, a mixing chamber formed between the mixing housing and the inlet housing, the inlet housing having a first outlet sidewall in the axial direction, a first water inlet on the first outlet sidewall, and a second outlet sidewall radially provided on the mixing housing, with a second water inlet on the second outlet sidewall;

[0011] The guide block is provided with a clamping part for clamping the guide block on the second outlet sidewall on the side of the second water inlet; the guide block is also provided with a positioning part, which is provided with a positioning structure for connecting the guide block and the outlet housing after the guide block is clamped on the second outlet sidewall on the side of the second water inlet.

[0012] Furthermore, the positioning structure includes:

[0013] The first positioning pin is provided on the positioning part; the second water outlet sidewall of the water outlet shell is provided with a connected large hole and a small hole, the first positioning pin has a first pin part with an outer diameter corresponding to the large hole part, and a second pin part that can slide between the large hole part and the small hole part.

[0014] The second positioning pin is offset on one end of the positioning part. A limiting boss is provided on the first water outlet side wall. The guide block is located on the limiting boss and the second positioning pin abuts against the limiting boss. The second positioning pin is used to restrict the sliding of the second pin between the large hole and the small hole by abutting against the positioning boss.

[0015] Furthermore, an impeller seat is protruding on the first water outlet sidewall, and a water flow channel is formed on the outer edge of the impeller seat; the limiting boss is provided at one end of the impeller seat.

[0016] Furthermore, the limiting protrusion is provided with a positioning slot, and one end of the guide block is located in the positioning slot.

[0017] Furthermore, the flow guide block also includes a positioning strip, which is used to be placed in the positioning slot, and the flow guide surface is provided on one side of the positioning strip.

[0018] Furthermore, the positioning structure includes a first locking hole provided on the positioning part, a second locking hole provided on the second water outlet sidewall on the second water outlet side, and a locking member connecting the positioning part and the second water outlet sidewall provided between the first locking hole and the second locking hole.

[0019] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0020] This patent reduces the manufacturing difficulty of the water pump head by using a detachable guide block. Moreover, the separately detached guide block can be processed independently and customized into a shape with better noise reduction effect, or its surface can be polished to be smoother to increase the noise reduction effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a water pump.

[0022] Figure 2This is a cross-sectional schematic diagram of a water pump.

[0023] Figure 3 This is a schematic diagram of the pump head and constant pressure unit.

[0024] Figure 4 This is a schematic diagram of the pump head exploding.

[0025] Figure 5 This is a schematic diagram showing the disassembly of the pump head and the constant pressure unit.

[0026] Figure 6 This is a schematic diagram of the internal structure of the constant pressure unit.

[0027] Figure 7 This is a schematic diagram showing the separation of the water outlet shell and the water inlet shell.

[0028] Figure 8 This is a schematic diagram showing the connection between the water inlet shell and the mixing shell.

[0029] Figure 9 This is a schematic diagram of the interior of the water inlet shell.

[0030] Figure 10 This is a schematic diagram of the flow guide block on the hybrid shell.

[0031] Figure 11 This is a schematic diagram of the flow guide block installed on the water inlet shell.

[0032] The meaning of the labels in the diagram:

[0033] 1. Drive motor; 12. Impeller; 13. Fastening base; 14. End cover; 15. Stator; 16. Rotor; 17. Motor shaft;

[0034] 2. Pump head; 21. Low-pressure chamber; 22. Mixing chamber; 23. High-pressure chamber; 3. Constant pressure unit; 31. Outer tank; 32. Inner tank; 33. Gas chamber; 34. Diaphragm component; 35. Diverter frame; 351. Diverter orifice;

[0035] 4. Inlet housing; 41. Inlet pipe; 42. First water outlet; 43. Support boss; 44. Narrowing section; 45. First outlet sidewall; 461. First spiral flow channel; 462. Second spiral flow channel; 47. Limiting boss; 471. Positioning slot; 48. First side cover; 49. Second side cover;

[0036] 5. Mixing shell; 51. Second water inlet; 52. Extension edge; 53. Second water outlet sidewall; 6. Water outlet shell; 61. Opening; 62. Interface; 63. Water outlet pipe; 7. Guide block; 71. Guide surface; 72. Clamping part; 73. Positioning part; 74. First positioning pin; 741. First pin part; 742. Second pin part; 75. Second positioning pin; 76. Large hole part; 77. Small hole part; 78. Positioning clip; 8. Mounting part; Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments:

[0038] A noise reduction structure for a water pump, used in a water pump, includes a drive motor 1, a pump head 2, a constant pressure unit 3, and a flow guide block 7. Combined with... Figure 1 , 2 As shown in Figure 4, the drive motor 1 is arranged horizontally, and its interior is provided with a stator 15, a rotor 16, and a motor shaft 17, which extends horizontally to one side. The pump head 2 is located in the axial direction of the drive motor 1. The pump head 2 has a low-pressure chamber 21, a mixing chamber 22, and a high-pressure chamber 23 arranged along the axial direction of the drive motor 1. The low-pressure chamber 21 is connected to a water inlet pipe 41, and the high-pressure chamber 23 is connected to a water outlet pipe 63. The impeller 12 is provided in the mixing chamber 22. A first water outlet 42 is provided between the mixing chamber 22 and the low-pressure chamber 21, and a second water outlet 51 is provided between the mixing chamber 22 and the high-pressure chamber 23. The constant pressure unit 3 is connected to one side of the pump head 2 and is connected to the high-pressure chamber 23 to stabilize the pressure in the high-pressure chamber 23. The guide block 7 is detachably fixed on the second water outlet 51, and the guide block 7 is provided with a guide surface 71 for contacting the water flow.

[0039] Combination Figure 3-5 As shown, the pump head 2 in this patent includes an inlet housing 4, a mixing housing 5 and an outlet housing 6 arranged along the axial direction of the drive motor 1. The inlet housing 4 and the mixing housing 5 are connected in sequence, and the low-pressure chamber 21 and the mixing chamber 22 are respectively formed inside them. The outlet housing 6 is provided with a high-pressure chamber 23. The mixing housing 5 is located inside the outlet housing 6, and the second water inlet 51 is provided on one side of the mixing housing 5.

[0040] Specifically, such as Figure 3As shown, the water inlet housing 4 is a flat, circular ring. The water inlet pipe 41 is integrally formed on the outer arc surface of the water inlet housing 4. The water inlet pipe 41 has two ends; one end is used to connect to a water source, and the other end is used to install a flow switch. The center of the circular water inlet housing 4 is used for the motor shaft 17 of the drive motor 1 to pass through. The side wall of the motor shaft 17 and the water inlet housing 4 have a sliding seal fit; specifically, a corresponding mechanical seal is provided on the motor shaft 17. The water inlet housing 4 has a first side cover 48 and a second side cover 49 on both sides. For ease of manufacturing, the second side cover 49 of the water inlet housing 4 is detachable, and the first side cover is integrally formed with the water inlet housing 4. This allows the water inlet housing 4 to be disassembled into two parts, which can be spliced ​​together into a whole during water pump assembly.

[0041] refer to Figure 3-8 As shown, the mixing housing 5 is also a flat cylindrical shape, connected to one end face of the inlet housing 4. In fact, the mixing housing 5 is a cover fixed to one side plane of the inlet housing 4. The mixing housing 5 and the one side plane of the inlet housing 4 are connected to form the mixing chamber 22. The motor shaft 17 of the drive motor 1 passes through the inlet housing 4 and is located inside the mixing housing 5, with the impeller 12 mounted at its end. To accommodate the normal operation of the impeller 12, the other axial surface of the inlet housing 4 is a first outlet sidewall 45. A constriction portion 44 is provided on the first outlet sidewall 45, and the impeller 12 is located on the constriction portion 44. A first spiral flow channel 461 corresponding to the outer diameter of the impeller 12 is formed on the outer edge of the constriction portion 44. The first water inlet 42 is located at the inlet of the first spiral flow channel 461, allowing water entering from the low-pressure chamber 21 to pass through the first water inlet 42 into the first spiral flow channel 461 and contact the impeller 12. The mixing housing 5 has a radially arranged annular second outlet sidewall 53, and the second water inlet 51 is located on the second outlet sidewall 53 of the outlet housing 6. In this patent, the second water inlet 51 is located at the end of the first spiral flow channel 461, and the water fed in from the first water inlet 42 is discharged from the second water inlet 51 by the rotation of the impeller 12.

[0042] The water outlet shell 6 is disposed outside the mixing shell 5, such as Figure 5 , 7 As shown, the water outlet housing 6 is an annular cover with an opening 61 in the middle. The water inlet housing 4 and the mixing housing 5 are located inside and outside the opening 61. Figure 7As shown, the water outlet housing 6 is a circular cover with an outer diameter larger than that of the water inlet housing 4 and the mixing housing 5. The size of the opening 61 on it is adapted to that of the water inlet housing 4 and the mixing housing 5. The outer edge of the mixing housing 5 is provided with an extension edge 52, and a fastening hole is provided on the extension edge 52. The fastening is used to directly fix the mixing housing 5 on the opening 61 and connect it to the water outlet housing 6. At this time, a second spiral flow channel 462 is formed on the outside of the mixing housing 5.

[0043] The water inlet housing 4 is provided with a support boss 43 that abuts against the edge of the opening 61. The water inlet housing 4 is provided with fasteners to keep it in the abutting state. The support boss 43 is formed on the edge of the boss portion of the water inlet housing 4. The outer diameter of the water inlet housing 4 is slightly larger than that of the opening 61, so that when the water inlet housing 4 is connected to the water outlet housing 6, the boss portion of the water inlet housing 4 passes through the opening 61 and the support boss 43 abuts against the outer edge of the opening 61. The fasteners include fastening seats 13 provided on the drive motor 1. In this embodiment, the fastening seats 13 are provided on the edge of the end cap 14 on one side of the drive motor 1. The end cap 14 on one side of the drive motor 1 abuts against the water inlet housing 4. The fasteners are screws. The water outlet housing 6 is connected by the screws, thereby squeezing and positioning the water inlet housing 4 located between the water outlet housing 6 and the drive motor 1, so that the water inlet housing 4 is tightly fixed on the outside of the water outlet housing 6.

[0044] Furthermore, an interface portion 62 is formed on one side of the water outlet shell 6, and a constant pressure unit 3 that closes the first side of the water outlet shell 6 is connected through the interface portion 62. The water outlet shell 6 is hemispherical, with a circular interface portion 62 formed on one side. The constant pressure unit 3 is specifically an air tank, which includes an outer tank body 31 and an inner tank body 32. An air chamber 33 is formed between the outer tank body 31 and the inner tank body 32. A diaphragm 34 is provided in the air chamber 33. A one-way air nozzle is provided on the outer tank body 31 to inflate the air chamber 33, thereby regulating the pressure inside the air chamber 33. The outer diameter of the inner tank 32 is adapted to the interface 62, and fasteners are provided on it to connect the water outlet shell 6 and the constant pressure component. At this time, the high pressure chamber 23 is formed in the water outlet shell 6. Since the mixing shell 5 is located in the water outlet shell 6, the mixing chamber 22 is connected to the high pressure chamber 23 through the second water outlet 51. The water flow sent from the mixing chamber 22 will pass through the high pressure chamber 23 and then be sent out from the water outlet pipe 63. The high-pressure chamber 23 is generally used for further water vapor separation. For this purpose, a diversion frame 35 is provided on the inner tank 32 within the high-pressure chamber 23. Several diversion frames 35 are provided, which are distributed around the inner tank 32 and integrally formed with it. Several diversion holes 351 for water vapor separation are formed on the diversion frame 35. In this embodiment, the diversion frame 35 extends forward to one side of the mixing shell 5. The water flow sent from the second water outlet 51 moves in the high-pressure chamber 23 and contacts the diversion frame 35. Water vapor separation is achieved through the diversion holes 351 on the diversion frame 35, thereby increasing the working effect of the water pump.

[0045] Because the outer diameter of the outlet housing 6 is larger than that of the inlet housing 4, a mounting portion 8 for mounting the outlet pipe 63 and the inlet pipe 41 is formed on the outer edge of the inlet housing 4. Figure 1 , 5 As shown, the mounting part 8 is formed before the drive motor 1 and the water outlet housing 6. Because of the mounting part 8, the user can set the water outlet pipe 63 on the outer side of the water outlet housing 6, so as to make the overall structure of the water pump more compact.

[0046] In this embodiment, the guide block 7 is provided with a clamping part 72 for clamping the guide block 7 onto the second outlet sidewall 53 on one side of the second water inlet 51; the guide block 7 is also provided with a positioning part 73, which has a positioning structure for connecting the guide block 7 and the outlet housing 6 after the guide block 7 is clamped onto the second outlet sidewall 53 on one side of the second water inlet 51. Figure 4 , 9As shown in Figure 10, the guide block 77 in this patent can be made of stainless steel. The positioning part 73 is a square panel that conforms to the curvature of the second water outlet sidewall 53. One end of the positioning part 73 has an upwardly curved clamping part 72, and the clamping part 72 has a guide surface 71 formed on its outer side that contacts the water flow. When the clamping part 72 is clamped on the second water outlet sidewall 53, the guide surface 71 is located in the second water inlet 51, while the positioning part 73 is placed inside the second water outlet sidewall 53 and above the impeller seat 44. Positioning is achieved through this positioning structure.

[0047] The positioning structure may include a first locking hole on the positioning part 73, and a second locking hole on the second outlet sidewall 53 on one side of the second water inlet 51. A locking member connecting the positioning part 73 and the second outlet sidewall 53 is provided between the first locking hole and the second locking hole. The locking member may be a screw, and correspondingly, the first locking hole and the second locking hole may be threaded holes.

[0048] However, after prolonged use, the fasteners are prone to detaching from the first and second locking holes, requiring the user to disassemble the entire water pump for maintenance. To solve this problem, this patent provides an alternative assembly method. Figure 9 , 10 As shown, the positioning structure includes a first positioning pin 74 and a second positioning pin 75. The first positioning pin 74 is disposed on the positioning part 73. The second water outlet sidewall 53 of the water outlet housing 6 is provided with a connected large hole 76 and a small hole 77. The first positioning pin 74 has a first pin part 741 with an outer diameter corresponding to the large hole 76, and a second pin part 742 that can slide between the large hole 76 and the small hole 77. The second positioning pin 75 is offsetly disposed on one end of the positioning part 73. The first water outlet sidewall 45 is provided with a limiting boss 47. The guide block 7 is located on the limiting boss 47 and the second positioning pin 75 abuts against the limiting boss 47 to restrict the sliding of the second pin part 742 between the large hole 76 and the small hole 77.

[0049] Combination Figure 9 , 10As shown, the limiting boss 47 is disposed on one side of the impeller seat 44, near the second outlet sidewall 53. The first water inlet 42 and the second water inlet 51 are located on either side of the limiting boss 47. The first positioning pin 74 is integrally formed on the positioning part 73. That is, the second pin 742 and the first pin 741 are respectively disposed internally and externally on the positioning part 73. The second pin 742 is strip-shaped, while the first pin 741 is planar, making its outer diameter much larger than that of the second pin 742. The large hole 76 and the small hole 77 are formed on one side of the second water inlet 51 and are connected. During installation, the first pin 741 can pass through the large hole 76, and the second pin 742 can be positioned within the large hole 76. Then, by sliding the guide block 7, the second pin 742 can be slid from the large hole 76 into the small hole 77. The second positioning pin 75 is specifically a rod vertically connected to one end of the positioning part 73, which moves with the movement of the positioning part 73. Since the mixing shell 5 and the water inlet shell 4 in this patent are detachably connected, and the limiting boss 47 is provided on the first water outlet sidewall 45 of the water inlet shell 4, the guide block 7 can be installed on the mixing shell 5 first, and then the mixing shell 5 and the water inlet shell 4 can be assembled together to allow the second positioning pin 75 to abut against the limiting boss 47 of the water inlet shell 4, thereby limiting the sliding of the second pin part 742 between the large hole part 76 and the small hole part 77, thus achieving positioning. Compared to a structure using locking elements for positioning, the use of the first positioning pin 74 and the second positioning pin 75 can effectively prevent the locking elements from falling off, making the overall structure more stable.

[0050] Furthermore, a positioning slot 471 is provided on the limiting boss 47, and one end of the flow guide block 7 is located in the positioning slot 471, so that the flow guide block 7 is embedded in the limiting boss 47, making the overall structure more stable. In order to further increase the installation stability of the flow guide block 7, the flow guide block 7 also includes a positioning strip 78, which is used to be placed in the positioning slot 471. One side of the positioning strip 78 is provided with the flow guide surface 71. By embedding the positioning strip 78 into the positioning slot 471 and making the flow guide surface 71 completely flat above the impeller seat 44, the flow guiding effect is further enhanced.

[0051] In summary, this patent reduces the manufacturing difficulty of the pump head 2 by using a detachable guide block 7. Moreover, the separately detached guide block 7 can be processed independently and customized into a shape with better noise reduction effect, or its surface can be polished to be smoother to increase the noise reduction effect.

[0052] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

[0053] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0054] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0055] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A water pump noise reduction structure, characterized in that, include: A drive motor (1) drives an impeller (12) by rotating the drive motor (1); Pump head (2), the pump head (2) has a low pressure chamber (21), a mixing chamber (22) and a high pressure chamber (23), the impeller (12) is provided in the mixing chamber (22), a first water inlet (42) is provided between the mixing chamber (22) and the low pressure chamber (21), and a second water inlet (51) is provided between the mixing chamber (22) and the high pressure chamber (23); A guide block (7) is detachably fixed to the second water outlet (51), and the guide block (7) is provided with a guide surface (71) for contacting the water flow.

2. The water pump noise reduction structure according to claim 1, characterized in that: The pump head (2) includes at least an inlet housing (4), a mixing cover (5) is connected to one axial side of the inlet housing (4), an outlet housing (6) is connected to the outside of the mixing cover (5), a low-pressure chamber (21) is formed in the inlet housing (4), a mixing chamber (22) is formed between the mixing cover (5) and the inlet housing (4), the inlet housing (4) has a first outlet sidewall (45) in the axial direction, a first water inlet (42) on the first outlet sidewall (45), a second outlet sidewall (53) is provided radially on the mixing cover (5), and a second water inlet (51) is provided on the second outlet sidewall (53); The guide block (7) is provided with a clamping part (72) for clamping the guide block (7) on the second outlet sidewall (53) on the side of the second water inlet (51); the guide block (7) is also provided with a positioning part (73), and the positioning part (73) is provided with a positioning structure for connecting the guide block (7) and the outlet shell (6) after the guide block (7) is clamped on the second outlet sidewall (53) on the side of the second water inlet (51).

3. The water pump noise reduction structure according to claim 2, characterized in that, The positioning structure includes: A first positioning pin (74) is provided on the positioning part (73); the second water outlet sidewall (53) of the water outlet shell (6) is provided with a connected large hole (76) and a small hole (77); the first positioning pin (74) has a first pin part (741) with an outer diameter corresponding to the large hole part (76), and a second pin part (742) that can slide between the large hole part (76) and the small hole part (77); The second positioning pin (75) is offset on one end of the positioning part (73). The first water outlet sidewall (45) is provided with a limiting boss (47). The guide block (7) is located on the limiting boss (47) and the second positioning pin (75) abuts against the limiting boss (47). The second pin part (742) is restricted from sliding between the large hole part (76) and the small hole part (77) by the second positioning pin (75) abutting against the positioning boss.

4. The water pump noise reduction structure according to claim 3, characterized in that: An impeller seat (44) is protruding on the first water outlet sidewall (45), and a water flow channel (46) is formed on the outer edge of the impeller seat (44); the limiting boss (47) is provided at one end of the impeller seat (44).

5. The water pump noise reduction structure according to claim 4, characterized in that: The limiting boss (47) is provided with a positioning slot (471), and one end of the guide block (7) is located in the positioning slot (471).

6. The water pump noise reduction structure according to claim 5, characterized in that: The guide block (7) also includes a positioning strip (78), which is used to be placed in the positioning slot (471), and the guide surface (71) is provided on one side of the positioning strip (78).

7. The water pump noise reduction structure according to claim 2, characterized in that: The positioning structure includes a first locking hole provided on the positioning part (73), a second locking hole provided on the second outlet sidewall (53) on one side of the second water outlet (51), and a locking member connecting the positioning part (73) and the second outlet sidewall (53) provided between the first locking hole and the second locking hole.

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