Centrifugal pump

Abstract

The utility model provides a centrifugal pump which is provided with a pump shell, a pressurizing module and a rotating shaft. The pump shell is provided with an axial direction, a first end, a second end and an outer cavity, a water inlet and a water outlet are located at the first end, and the water inlet direction of the water inlet is parallel to the water outlet direction of the water outlet. The pressurizing module is arranged in the outer cavity, and a gap is formed between the pressurizing module and the inner ring wall face of the pump shell. The pressurizing module comprises a module shell and an impeller. The module shell is provided with an inner cavity, an input end and an output end, and the inner cavity is communicated with the water inlet through the input end and communicated with the outer cavity through the output end. The impeller is located in the inner cavity. The rotating shaft penetrates through the outer cavity and the module shell and is connected to the impeller. The water inlet and the water outlet are integrated, so that the size of the pump shell can be reduced, and the pump shell is convenient to manufacture, machine or overhaul and maintain.

Description

Technical Field

[0001] The utility model relates to a pump, in particular to a centrifugal pump used for pressurizing fluid. Background Art

[0002] A centrifugal pump is a device that uses a rotating impeller to promote fluid flow and generate centrifugal force to complete fluid transportation. Centrifugal pumps are mostly used for pressurized transportation of liquids, such as tap water, seawater, or liquid compounds, so they are commonly used in the fields of garden irrigation, cleaning systems, liquid transportation, etc. A traditional centrifugal pump consists of a pump casing, an impeller, and a shaft seal. The pump casing has a water inlet and a water outlet. The impeller is rotatably arranged in the pump casing. An external motor is connected to the impeller through the shaft seal and drives the impeller to rotate, thereby pressurizing the fluid flowing in from the water inlet to make it flow out from the water outlet.

[0003] The pump casing of a traditional centrifugal pump is usually designed with its pipelines so that the water inlet and outlet directions are perpendicular to each other. Specifically, due to the characteristics of the impeller's rotational force direction, the traditional design makes the water inlet direction parallel to the impeller's rotation axis, and the water outlet direction parallel to the impeller's radial direction. Therefore, from the appearance of the pump casing, it can be seen that the water inlet and outlet are perpendicular to each other, and there may be a distance between them because they conform to the chamber where the impeller is located.

[0004] However, the design of the pump housing will force its volume to increase, especially in the coaxial pump that needs to pursue a smaller volume. The vertical outlet requires the need to reserve a connection space for the outlet pipe, which causes inconvenience, and the irregular shape will also increase the difficulty of manufacturing and processing the pump housing. During repair or maintenance, since the water inlet and the water outlet are perpendicular to each other and there may be a distance between them, the maintenance personnel must move back and forth to perform inspection or maintenance, which is not only very time-consuming, but also inconvenient for the maintenance personnel.

[0005] In addition, conventional centrifugal pumps often have accumulated fluid at the location where they are connected to the motor. This accumulated fluid cannot be discharged and has the opportunity to seep into the connection mechanism used to fix the motor and the pump. Over time, this may cause the connection mechanism to rust or corrode, leading to leakage, and even further causing the connection between the pump and the motor to become unstable or fail, resulting in damage.

[0006] In view of this, it is necessary to improve the traditional centrifugal pump. Utility Model Content

[0007] The main purpose of the utility model is to provide a centrifugal pump, the water inlet and the water outlet of which are located on the same plane.

[0008] In order to achieve the above-mentioned object, the centrifugal pump proposed by the utility model comprises:

[0009] A pump housing has an axial direction, and the two opposite ends of the pump housing in the axial direction include a first end and a second end, and the pump housing includes:

[0010] an outer chamber formed in the pump housing and located between the first end and the second end;

[0011] A water inlet, which is located at the first end and has a water inlet direction, and the water inlet communicates with the inside and the outside of the pump housing;

[0012] a water outlet, which is located at the first end and has a water outlet direction, the water outlet is connected to the outer chamber and the outside of the pump housing; the water inlet direction and the water outlet direction are parallel to each other;

[0013] A pressurizing module is disposed in the outer chamber and extends along the axial direction of the pump housing, and there is a gap between the pressurizing module and the inner annular wall of the pump housing; the pressurizing module comprises:

[0014] A module shell, which surrounds an inner chamber, the module shell has an input end and an output end opposite to each other along the axial direction, the module shell is sealed and connected to the periphery of the water inlet of the pump housing with the input end, and an input port is formed around the input end, and the inner chamber is connected to the water inlet through the input port; the output end extends toward the second end and penetrates to form an output port, and the inner chamber is connected to the outer chamber through the output port; and

[0015] an impeller rotatably disposed in the inner chamber; and

[0016] A rotating shaft is arranged in the outer chamber along the axial direction of the pump housing and penetrates the module housing. The rotating shaft is connected to the impeller to drive the impeller to rotate relative to the module housing.

[0017] Therefore, the advantage of the present invention is that, by integrating the water inlet and the water outlet at the first end of the pump casing, compared with the traditional centrifugal pump, the pump casing of the present invention does not need to protrude in the radial direction to form the water outlet, so the volume of the pump casing can be further reduced, and the appearance of the pump casing can be simplified, which is convenient for the manufacture and processing of the pump casing; it is also convenient for inspection or maintenance, and there is no need to move back and forth between the water inlet and the water outlet, which can save time and physical strength and improve work efficiency.

[0018] As mentioned above, the centrifugal pump, wherein the water outlet direction of the water outlet is parallel to the axial direction.

[0019] The centrifugal pump as described above, wherein the pump housing comprises an inlet and outlet piece, which is located at the first end, the water inlet and the water outlet are formed at the inlet and outlet piece, and the input end of the module housing is sealed and connected to the inlet and outlet piece. An outer sleeve, which extends along the axial direction and is sealed and connected to the inlet and outlet piece; and an end cover, which is located at the second end and is sealed and connected to the outer sleeve, there is a gap between the end cover and the output end of the module housing, and the rotating shaft passes through the end cover; wherein the inlet and outlet piece, the outer sleeve, and the end cover together surround and form the outer chamber.

[0020] A centrifugal pump as described above, wherein the module shell further has a guide seat, which is arranged in the inner chamber and is located between the impeller and the output end, and the guide seat includes: a baffle plate, which is spaced apart from the output end, and the rotating shaft passes through the baffle plate, and a plurality of guide holes are formed between the baffle plate and the inner ring wall of the module shell; and a plurality of guide vanes, which are spaced apart from each other, each of the guide vanes is sealingly connected to the baffle plate, the output end, and the inner ring wall of the module shell, and each of the guide vanes extends outward from the edge of the output port along the vortex shape to the inner ring wall of the module shell.

[0021] As the aforementioned centrifugal pump, wherein the number of the pressurizing modules is plural, and the pressurizing modules are connected in series with each other along the axial direction.

[0022] As mentioned above, in the centrifugal pump, a drainage hole is formed through the end cover, and the drainage hole is located at the bottom side of the end cover and is communicated with the outer chamber.

[0023] As the aforementioned centrifugal pump, wherein the position of the drainage hole is higher than the position of the water outlet.

[0024] The centrifugal pump as mentioned above further comprises a bearing, which is arranged at the second end, and the rotating shaft passes through the bearing.

[0025] The centrifugal pump as mentioned above further comprises a bearing, which is arranged on the end cover, and the rotating shaft passes through the bearing.

[0026] The centrifugal pump as described above, wherein the bearing comprises a ceramic material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the appearance of the utility model.

[0028] Figure 2 It is a top view schematic diagram of the utility model.

[0029] Figure 3 It is a front view schematic diagram of the utility model.

[0030] Figure 4It is a three-dimensional exploded schematic diagram of the utility model.

[0031] Figure 5 It is a three-dimensional exploded schematic diagram from another viewing angle of the present invention.

[0032] Figure 6 For the utility model Figure 2 A schematic cross-sectional view of the AA section line, which is connected to a motor.

[0033] Figure 7 For the utility model Figure 2 Schematic diagram of the cross-section along the AA cutting line, which shows the direction of water flow.

[0034] Figure 8 For the utility model Figure 6 Schematic diagram of the cross-section along the BB cutting line.

[0035] Fig. 9 It is a schematic diagram of the appearance of the module shell of the pressurizing module of the present utility model.

[0036] Fig.10 It is a top view schematic diagram of the module shell of the present utility model.

[0037] Fig.11 The module shell edge of the utility model Fig.10 Schematic diagram of the cross-section along the CC cutting line.

[0038] Fig.12 The module shell edge of the utility model Fig.11 Schematic diagram of the cross-section of the DD cutting line. DETAILED DESCRIPTION

[0039] First, please refer to Figure 1 and Figure 4 The present invention provides a centrifugal pump, which includes a pump housing 10, a pressurizing module 20, and a rotating shaft 30. In this embodiment, a coaxial centrifugal water pump is used as an example for demonstration, but the present invention is not limited thereto, and the present invention can also be applied to other types of pumps.

[0040] Please refer to Figures 1 to 6The pump housing 10 has an axial direction A1, and the two opposite ends of the pump housing 10 in the axial direction A1 include a first end 101 and a second end 102. An outer chamber 11 is formed in the pump housing 10 and is located between the first end 101 and the second end 102. A water inlet 131 and a water outlet 132 are located at the first end 101, and the water inlet 131 and the water outlet 132 are connected to the inside and the outside of the pump housing 10 respectively. The water inlet 131 has a water inlet direction A3 and the water outlet 132 has a water outlet direction A2, wherein the water inlet direction A3 and the water outlet direction A2 are substantially parallel to each other, specifically, the directions of the water inlet 131 and the water outlet 132 are consistent. The outer chamber 11 is connected to the water outlet 132. In this embodiment, the water outlet direction A2 is parallel to the axial direction A1, but it is not limited thereto. The water outlet direction A2 and the axial direction A1 can be roughly parallel or skewed to a certain extent. Figure 3 As shown, in this embodiment, the water outlet 132 is located at a lower side of the first end 101, so that when the utility model is not in use, the accumulated water inside the pump housing 10 can be easily discharged, but the present invention is not limited thereto.

[0041] Specifically, the pump housing 10 in this embodiment includes an outer sleeve 12, an inlet and outlet member 13, and an end cover 14. The outer sleeve 12 extends along the axial direction A1, and the inlet and outlet member 13 is located at the first end 101 and is sealed to one end of the outer sleeve 12, wherein the water inlet 131 and the water outlet 132 are both formed through the inlet and outlet member 13. The end cover 14 is located at the second end 102 and is sealed to the other end of the outer sleeve 12, whereby the outer chamber 11 is formed between the outer sleeve 12, the inlet and outlet member 13, and the end cover 14.

[0042] The end cap 14 may be formed with a drainage hole 141, which is located at the bottom side of the end cap 14 and communicates with the outer chamber 11. Further, in this embodiment, the end cap 14 may have a plurality of drainage holes 141, and the position of the drainage holes 141 is higher than the position of the water outlet 132, but it is not limited thereto, the end cap 14 may not have the drainage hole 141, or the position of the drainage hole 141 may be adjusted according to demand.

[0043] In addition, if Figure 5 and Figure 6 As shown in , the pump housing 10 in this embodiment may also have a bearing 15, which is disposed at the second end 102 and sleeved on the rotating shaft 30. Specifically, the bearing 15 may be disposed on the end cover 14 and sleeved on the rotating shaft 30, whereby the rotating shaft 30 may rotate relative to the end cover 14. The bearing 15 in this embodiment includes a ceramic material. Furthermore, in this embodiment, a mechanical shaft seal made of a ceramic material is used as the bearing 15, whereby the effects of wear resistance and easy heat dissipation can be achieved, but the invention is not limited thereto.

[0044] Please refer to Figures 4 to 8 The pressurizing module 20 is disposed in the outer chamber 11 and extends along the axial direction A1 of the pump housing 10. Figures 6 to 8 As shown, there is a gap between the pressurizing module 20 and the inner annular wall of the pump housing 10, and the gap is connected to the water outlet 132 of the pump housing 10. In this embodiment, there are multiple pressurizing modules 20, which are connected in series along the axial direction A1 to form a multi-stage centrifugal pump structure, thereby applying more pressure to the fluid, but it is not limited to this, and there can be only one pressurizing module 20.

[0045] Please refer to Figure 6 , Figure 7 ,and Fig. 9 Each pressurizing module 20 includes a module shell 21 and an impeller 22. The module shell 21 surrounds an inner chamber 211, and the module shell 21 has an input end 212 and an output end 213 opposite to each other along the axial direction A1. The module shell 21 also has a guide seat 214, which is located in the inner chamber 211 and connected to the output end 213.

[0046] One of the module shells 21 is sealedly connected to the periphery of the water inlet 131 of the pump housing 10 with an input end 212, and an input port 2121 is formed around the input end 212, whereby the inner chamber 211 is connected to the water inlet 131 through the input port 2121; specifically, the input end 212 of the module shell 21 in this embodiment is sealedly connected to the side of the inlet and outlet 13 facing the second end 102. The output end 213 extends toward the second end 102 of the pump housing 10, and an output port 2131 is formed through it. There is a gap (i.e., a part of the outer chamber 11) between the output end 213 of the module shell 21 and the end cover 14, and the inner chamber 211 is connected to the outer chamber 11 through the output port 2131.

[0047] In this embodiment, the plurality of pressurizing modules 20 can be connected in series along the axial direction A1. Specifically, Figures 4 to 6 As shown, the module shells 21 of two adjacent pressurizing modules 20 have an input end 212 of one module shell 21 sealedly connected to an output end 213 of the other module shell 21 , and the inner chambers 211 of the two pressurizing modules 20 are interconnected.

[0048] Please refer to Figure 6 , Figures 9 to 12The guide seat 214 is disposed in the inner chamber 211 and is located between the impeller 22 and the output end 213. The guide seat 214 includes a baffle plate 2141 and multiple guide vanes 2142. The baffle plate 2141 is spaced apart from the output end 213, and the rotating shaft 30 passes through the baffle plate 2141. The guide pieces 2142 are arranged at intervals from each other, and each guide piece 2142 is sealed to connect the baffle plate 2141, the output end 213, and the inner ring wall of the module shell 21, and a plurality of guide holes 2143 are formed between the baffle plate 2141 and the inner ring wall of the module shell 21 between each guide piece 2142, and each guide piece 2142 extends outward from the edge of the output port 2131 along the vortex shape to the inner ring wall of the module shell 21, thereby forming a plurality of vortex-shaped flow channels between two adjacent guide pieces 2142, the baffle plate 2141, and the output end 213. Therefore, the fluid entering the inner chamber 211 of the module shell 21 will pass through the guide holes 2143 after centrifugal pressurization, and arrive at the output port 2131 along the aforementioned flow channel and leave the inner chamber 211.

[0049] The impeller 22 is rotatably disposed in the inner chamber 211. Specifically, the impeller 22 is located between the baffle plate 2141 and the input end 212 of the module shell 21, and the shaft 30 passes through the baffle plate 2141 and enters the inner chamber 211. The impeller 22 is sleeved on the shaft 30 and is driven to rotate.

[0050] Please refer to Figures 4 to 6 , the rotating shaft 30 is penetrated in the outer chamber 11 along the axial direction A1 of the pump housing 10. The rotating shaft 30 penetrates the module housing 21 of the pressurizing module 20 and passes into the inner chamber 211, and is connected to the impeller 22 located in the inner chamber 211, thereby driving the impeller 22 to rotate relative to the module housing 21. In this embodiment, the rotating shaft 30 penetrates the end cover 14 and then penetrates into the outer chamber 11. Specifically, the rotating shaft 30 is penetrated by the bearing 15 provided on the end cover 14, thereby the rotating shaft 30 can rotate relative to the end cover 14. The rotating shaft 30 can be shared with an external motor, or it can be independent of the motor and connected to the output shaft of the motor in other ways.

[0051] Please refer to Figure 6 and Figure 7 When the utility model is used to pressurize a fluid, a motor M can be connected to the side of the end cover 14 away from the first end 101, and the motor M is used to drive the rotating shaft 30 to rotate. After the fluid enters from the water inlet 131 of the pump housing 10, it will pass through the input port 2121 and flow into the inner chamber 211 of the module housing 21 of the pressurizing module 20, pass through the guide hole 2143 after centrifugal pressurization by the impeller 22, and then leave the pressurizing module 20 from the output port 2131 and enter the outer chamber 11 near the end cover 14. Then, the pressurized fluid will flow to the water outlet 132 through the gap between the pressurizing module 20 and the outer sleeve 12, and finally leave from the water outlet 132.

[0052] When the utility model is not used, Figure 6 As shown, since the bottom side of the end cover 14 has a drainage hole 141, the accumulated fluid accumulated between the motor M and the end cover 14 during use can be driven by gravity to pass through the drainage hole 141 into the outer chamber 11, avoiding accumulation between the motor M and the pump housing 10, and reducing the chance of damage to the mechanism connecting the motor M and the pump housing 10. Further, since the position of the water outlet 132 is lower than the drainage hole 141, the accumulated fluid flowing into the outer chamber 11 can pass through the water outlet 132 and leave the utility model.

[0053] By means of the above structure, the pump housing 10 of the present invention can set both the water inlet 131 and the water outlet 132 at the first end 101, that is, on the same plane, and can further make the water outlet direction A2 and the direction of the fluid entering the present invention from the water inlet 131 parallel to each other. The present invention integrates the water inlet 131 and the water outlet 132 in the same plane, and makes the water outlet direction A2 of the water outlet 132 parallel to the water inlet direction A3. Compared with the water outlet direction of the traditional centrifugal pump being perpendicular to its water inlet direction, the pump housing 10 of the present invention does not need to protrude in the radial direction to form a water outlet, so the volume of the pump housing 10 can be further reduced, and the appearance of the pump housing 10 can be simplified, which is convenient for the manufacturing and processing of the pump housing 10. In addition, the water inlet 131 and the water outlet 132 are aligned in the same direction, which can also facilitate maintenance personnel to carry out inspection or maintenance, and there is no need to move back and forth between the water inlet 131 and the water outlet 132, saving time and physical strength, and increasing the work efficiency of maintenance personnel.

Claims

1. A centrifugal pump, characterized in that: Include: A pump housing has an axial direction, and the two opposite ends of the pump housing in the axial direction include a first end and a second end, and the pump housing includes: an outer chamber formed in the pump housing and located between the first end and the second end; A water inlet, which is located at the first end and has a water inlet direction, and the water inlet communicates with the inside and the outside of the pump housing; a water outlet, which is located at the first end and has a water outlet direction, the water outlet is connected to the outer chamber and the outside of the pump housing; the water inlet direction and the water outlet direction are parallel to each other; A pressurizing module is disposed in the outer chamber and extends along the axial direction of the pump housing, and there is a gap between the pressurizing module and the inner annular wall of the pump housing; the pressurizing module comprises: A module shell, which surrounds an inner chamber, the module shell has an input end and an output end opposite to each other along the axial direction, the module shell is sealed and connected to the periphery of the water inlet of the pump housing with the input end, and an input port is formed around the input end, and the inner chamber is connected to the water inlet through the input port; the output end extends toward the second end and penetrates to form an output port, and the inner chamber is connected to the outer chamber through the output port; and an impeller rotatably disposed in the inner chamber; and A rotating shaft is arranged in the outer chamber along the axial direction of the pump housing and penetrates the module housing. The rotating shaft is connected to the impeller to drive the impeller to rotate relative to the module housing.

2. The centrifugal pump according to claim 1, characterized in that The water outlet direction of the water outlet is parallel to the axial direction.

3. The centrifugal pump according to claim 1, characterized in that: The pump housing contains: An inlet and outlet piece, which is located at the first end, the water inlet and the water outlet are formed on the inlet and outlet piece, and the input end of the module shell is sealed and connected to the inlet and outlet piece; An outer sleeve extending along the axial direction and sealingly connected to the inlet and outlet member; as well as an end cover, which is located at the second end and is sealed to the outer sleeve, a gap is provided between the end cover and the output end of the module shell, and the rotating shaft passes through the end cover; The inlet and outlet piece, the outer sleeve, and the end cover together surround and form the outer chamber.

4. The centrifugal pump according to any one of claims 1 to 3, characterized in that The module shell further has: A guide seat is disposed in the inner chamber and located between the impeller and the output end, and the guide seat comprises: a baffle plate, which is spaced apart from the output end, and the rotating shaft passes through the baffle plate, and a plurality of guide holes are formed between the baffle plate and the inner annular wall surface of the module shell; and A plurality of guide vanes are arranged at intervals from each other, each of the guide vanes is sealingly connected to the spoiler, the output end, and the inner ring wall of the module shell, and each of the guide vanes extends outward from the edge of the output port along a vortex line shape to the inner ring wall of the module shell.

5. The centrifugal pump according to any one of claims 1 to 3, characterized in that There are multiple pressurizing modules, and the pressurizing modules are connected in series along the axial direction.

6. The centrifugal pump according to claim 3, characterized in that: A liquid drain hole is formed through the end cover, and the liquid drain hole is located at the bottom side of the end cover and is communicated with the outer chamber.

7. The centrifugal pump according to claim 6, characterized in that The position of the drainage hole is higher than the position of the water outlet.

8. The centrifugal pump according to claim 1, characterized in that Further including: A bearing is arranged at the second end, and the rotating shaft passes through the bearing.

9. The centrifugal pump according to claim 3, characterized in that: Further including: A bearing is arranged on the end cover, and the rotating shaft passes through the bearing.

10. The centrifugal pump according to claim 8 or 9, characterized in that: The bearing comprises a ceramic material.

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