Pump body mounting structure of centrifugal pump

Abstract

The pump body mounting structure of the centrifugal pump comprises a pump body, a sealing seat and an end cover support, a mounting opening is formed in the end face of the end cover support, the sealing seat is embedded in the mounting opening of the end cover support, a sealing opening is formed in the sealing seat, and the end of the pump body enters the sealing opening of the sealing seat in a pressed mode. A sealing ring groove is formed in the contact position of the pump body and the sealing seat, and a sealing ring is arranged in the sealing ring groove. According to the centrifugal pump, the sealing ring groove in the pump body can play a role of a reinforcing rib, the structural strength of the end of the pump body can be improved, when the water outlet of the pump body is affected by a pipeline, deformation of the joint of the pump body and the sealing seat is not likely to be caused, then the situation that a gap between the pump body and the sealing seat is enlarged due to deformation of the pump body is improved, and therefore the service life of the centrifugal pump is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of water conveyance equipment, and in particular to a pump body mounting structure for a centrifugal pump. Background Technology

[0002] A water pump is a transmission machine used to transport or pressurize liquids. It transfers the mechanical energy of a prime mover or other external energy to the liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acid and alkali solutions, emulsions, suspensions, or liquid metals.

[0003] The subcategories of water pumps include horizontal multistage centrifugal pumps, such as... Figure 1 As shown, the existing horizontal multistage centrifugal pump includes a motor 5 and a sheet metal pump body 1. An end cover bracket 3 is provided on the motor 5, and a sealing seat 2 is installed on the end cover bracket 3. A sealing ring 19 is fitted on the sealing seat 2. By pressing the sealing seat 2 into the sheet metal pump body 1, a sealing and waterproof connection between the end cover bracket 3 and the sheet metal pump body 1 is achieved.

[0004] Regarding the aforementioned technologies, the inventors believe that the existing end cover brackets only serve to install the sealing seat. After the water outlet is machined on the sheet metal pump body, the water outlet is connected to the pipeline. When the water outlet of the sheet metal pump body is affected by the pipeline, it is easy to cause deformation at the connection between the sheet metal pump body and the end cover bracket, resulting in an increased gap between the sheet metal pump body, the end cover bracket, and the sealing seat, which causes water leakage and affects the service life of the centrifugal pump. Therefore, there are certain areas for improvement. Utility Model Content

[0005] To improve the service life of centrifugal pumps, this application provides a pump body mounting structure for centrifugal pumps.

[0006] The pump body mounting structure of the centrifugal pump provided in this application adopts the following technical solution:

[0007] A centrifugal pump body mounting structure includes a pump body, a sealing seat, and an end cover bracket. The end cover bracket has an mounting port on its end face. The sealing seat is fitted into the mounting port of the end cover bracket and has a sealing opening. The end of the pump body is press-fitted into the sealing opening of the sealing seat. A sealing ring groove is provided at the contact position between the pump body and the sealing seat, and a sealing ring is provided in the sealing ring groove.

[0008] Preferably, the pump body is a sheet metal pump body.

[0009] Preferably, both the pump body and the sealing seat are made of stainless steel.

[0010] Preferably, the sealing ring groove extends toward the center of the pump body, the sealing ring is fitted in the sealing ring groove, and the sealing ring is pressed between the sealing seat and the sealing ring groove.

[0011] Preferably, the sealing seat has a first guide bevel on the edge of the mounting port, and the opening edge of the pump body end has a second guide bevel that mates with the first guide bevel.

[0012] Preferably, the first guide bevel is configured to expand outward, and the second guide bevel is configured to contract inward.

[0013] Preferably, the pump body mounting structure further includes an inlet end cover, which is embedded in the end of the pump body away from the end cover bracket, and the inlet end cover and the end cover bracket are tightened and fixed together by several tie rods.

[0014] Preferably, the water inlet end cap is provided with a plurality of first mounting ears at intervals along the circumferential direction, and the outer wall of the end cap bracket is provided with a plurality of second mounting ears at intervals along the circumferential direction. The first mounting ears and the second mounting ears are positioned opposite each other, and the pull rod passes through the first mounting ear and is threaded to the second mounting ear at its rear end.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] 1. The sealing ring groove in the pump body of this application can act as a reinforcing rib, which can improve the structural strength of the pump body end. When the pump body outlet is affected by the pipeline, it is not easy to cause deformation at the connection between the pump body and the sealing seat, thereby improving the gap between the pump body and the sealing seat caused by the deformation of the pump body, and thus improving the service life of the centrifugal pump.

[0017] 2. In this application, the sealing ring groove acts as a reinforcing rib, which can better ensure the roundness of the pump body end when the pump body is processed at the outlet.

[0018] 3. When the pump body outlet is affected by the pipeline, the end cover bracket and sealing seat are not subjected to radial force. The end cover bracket and sealing seat have good roundness and can always squeeze the pump body end, thereby improving the roundness of the pump body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a centrifugal pump in the existing technology.

[0020] Figure 2 This is a schematic diagram of the centrifugal pump in this embodiment.

[0021] Figure 3 This is a cross-sectional schematic diagram of the pump body in this embodiment.

[0022] Figure 4 yes Figure 3 Enlarged schematic diagram of part A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Pump body; 2. Sealing seat; 3. End cover bracket; 4. Inlet end cover; 5. Motor; 6. Tie rod; 7. First mounting ear; 8. Second mounting ear; 9. Pump chamber; 10. Pressure chamber; 11. Pump shaft; 12. Impeller assembly; 13. Inlet; 14. Outlet; 15. Mounting port; 16. Sealing port; 17. Sealing ring groove; 18. Sealing ring; 19. First guide bevel; 20. Second guide bevel. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 2-4 This application will be described in further detail.

[0025] A pump body mounting structure for a centrifugal pump, which is used in centrifugal pumps.

[0026] Reference Figure 2 and Figure 3 As shown, the pump body mounting structure includes a pump body 1, a sealing seat 2, an end cover bracket 3, and an inlet end cover 4. The end cover bracket 3 is fixed to the end of the motor 5 of the centrifugal pump. The end of the pump body 1 is connected to the end cover bracket 3. The inlet end cover 4 is embedded in the end of the pump body 1 away from the end cover bracket 3. The inlet end cover 4 and the end cover bracket 3 are tightened and fixed by several tie rods 6.

[0027] Specifically, the inlet end cover 4 is provided with a number of first mounting ears 7 at intervals along the circumferential direction, and the outer wall of the end cover bracket 3 is provided with a number of second mounting ears 8 at intervals along the circumferential direction. The first mounting ears 7 and the second mounting ears 8 are positioned opposite each other. The pull rod 6 passes through the first mounting ears 7 and is threaded to the second mounting ears 8, so as to realize the installation and fixation of the inlet end cover 4, the pump body 1 and the end cover bracket 3.

[0028] The pump body 1 contains a pump chamber 9, within which several pressure chambers 10 are stacked. A pump shaft 11 is located within each pressure chamber 10, and an impeller assembly 12 is mounted on the pump shaft 11. An inlet 13 is located on the inlet end cover 4. The uppermost pressure chamber 10 has an inlet communicating with the inlet 13, and the lowermost pressure chamber 10 has an outlet communicating with the pump chamber 9. An outlet 14 is located on the side wall of the pump body 1, communicating with the pump chamber 9. The motor shaft of the motor 5 passes through the end cover bracket 3 and is connected to the pump shaft 11. Thus, the motor 5 drives the pump shaft 11 to rotate, which in turn drives the impeller assembly 12 to rotate, thereby drawing water in through the inlet 13, pressurizing it through the impeller assembly 12, and discharging it through the outlet 14.

[0029] The following is a detailed description of the installation structure of the pump body 1 and the end cover bracket 3.

[0030] Reference Figure 3 and Figure 4As shown, an installation port 15 is provided on the end face of the end cover bracket 3. The installation port 15 is located on the end face of the end cover bracket 3 away from the motor 5. The sealing seat 2 is embedded in the installation port 15 of the end cover bracket 3. The sealing seat 2 is provided with a sealing port 16, which is open. A connection port is provided at the center of the sealing seat 2. The pump shaft 11 passes through the connection port and is connected to the motor shaft of the motor 5. The sealing seat 2 is provided with a mechanical seal and an oil seal at the connection port for the pump shaft 11 to pass through.

[0031] The end of the pump body 1 is press-fitted into the sealing port 16 of the sealing seat 2. A sealing ring groove 17 is provided at the contact position between the pump body 1 and the sealing seat 2, and a sealing ring 18 is provided in the sealing ring groove 17. The sealing ring groove 17 extends towards the center of the pump body 1, and the sealing ring 18 is fitted into the sealing ring groove 17, and the sealing ring 18 is pressed between the sealing seat 2 and the sealing ring groove 17.

[0032] In this embodiment, the pump body 1 is a sheet metal pump body 1, and both the pump body 1 and the sealing seat 2 are made of stainless steel.

[0033] It is worth noting that the sealing seat 2 has a first guide bevel 19 on the edge of the mounting port 15. The first guide bevel 19 is set to expand outward. The opening edge at the end of the pump body 1 has a second guide bevel 20 that cooperates with the first guide bevel 19. The second guide bevel 20 is set to contract inward. Through the setting of the first guide bevel 19 and the second guide bevel 20, the sealing seat 2 can squeeze the pump body 1 during the process of the pump body 1 being inserted into the sealing seat 2, thereby improving the roundness of the end of the pump body 1.

[0034] Therefore, the sealing ring groove 17 in the pump body 1 of this application can act as a reinforcing rib, which can improve the structural strength of the end of the pump body 1. When the pump body 1 is processed at the outlet 14, the roundness of the end of the pump body 1 can be better guaranteed. Furthermore, when the outlet 14 of the pump body 1 is affected by the pipeline, it is not easy to cause deformation at the connection between the pump body 1 and the sealing seat 2, thereby improving the gap between the pump body 1 and the sealing seat 2 caused by the deformation of the pump body 1, and thus improving the service life of the centrifugal pump.

[0035] When the outlet 14 of the pump body 1 is affected by the pipeline, the end cover bracket 3 and the sealing seat 2 are not subjected to radial force. The end cover bracket 3 and the sealing seat 2 have good roundness and can always squeeze the end of the pump body 1, thereby improving the roundness of the pump body 1.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pump body mounting structure of a centrifugal pump comprising a pump body (1), a seal carrier (2) and an end cover support (3), characterized in that, The end face of the end cover support (3) is provided with a mounting port (15), the sealing seat (2) is embedded in the mounting port (15) of the end cover support (3), the sealing seat (2) is provided with a sealing port (16), the end of the pump body (1) is press-fitted into the sealing port (16) of the sealing seat (2), the contact position of the pump body (1) and the sealing seat (2) is provided with a sealing ring groove (17), and the sealing ring groove (17) is provided with a sealing ring (18).

2. A pump housing mounting structure for a centrifugal pump according to claim 1, wherein The pump body (1) is a sheet metal pump body (1).

3. A pump housing mounting structure for a centrifugal pump according to claim 1, wherein The pump body (1) and the sealing seat (2) are both made of stainless steel.

4. A pump housing mounting structure for a centrifugal pump according to claim 1, wherein The sealing ring groove (17) extends to the center of the pump body (1), the sealing ring (18) is sleeved in the sealing ring groove (17), and the sealing ring (18) is compressed between the sealing seat (2) and the sealing ring groove (17).

5. A pump housing mounting structure for a centrifugal pump according to claim 1, wherein The sealing seat (2) is provided with a first guide inclined port (19) on the edge of the mounting port (15), and the opening edge of the end of the pump body (1) is provided with a second guide inclined port (20) matched with the first guide inclined port (19).

6. A pump housing mounting structure for a centrifugal pump according to claim 5, wherein The first guide inclined port (19) is outwardly expanded, and the second guide inclined port (20) is inwardly contracted.

7. A pump housing mounting structure for a centrifugal pump according to claim 1, wherein The pump body mounting structure further comprises a water inlet end cover (4), the water inlet end cover (4) is embedded in the end of the pump body (1) away from the end cover support (3), and the water inlet end cover (4) and the end cover support (3) are fixed by a plurality of pull rods (6).

8. A pump housing mounting structure for a centrifugal pump according to claim 7, wherein A plurality of first mounting ears (7) are arranged on the water inlet end cover (4) in the circumferential direction, a plurality of second mounting ears (8) are arranged on the outer wall of the end cover support (3) in the circumferential direction, the positions of the first mounting ears (7) and the second mounting ears (8) are opposite, and the pull rod (6) is threadedly connected on the second mounting ear (8) after passing through the rear end of the first mounting ear (7).

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