WO2020026263A1 - Integrated connecting frame with bearing cover - Google Patents
Integrated connecting frame with bearing cover Download PDFInfo
- Publication number
- WO2020026263A1 WO2020026263A1 PCT/IN2019/050495 IN2019050495W WO2020026263A1 WO 2020026263 A1 WO2020026263 A1 WO 2020026263A1 IN 2019050495 W IN2019050495 W IN 2019050495W WO 2020026263 A1 WO2020026263 A1 WO 2020026263A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- integrated
- frame
- bearing cover
- bearing
- pump assembly
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/0462—Bearing cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
Definitions
- the present subject matter relates, in general, to connecting frame of pump assembly, and in particular to a centrifugal pump assembly with an integrated connecting frame with bearing cover.
- Centrifugal pump assemblies generally include a number of components that work together to transfer energy from a rotor to a fluid.
- centrifugal pump assemblies typically include an impeller, a stuffing box, a shaft, and a motor that are mounted in various housings/ casings and connected through various bearings, frames, etc. Assembling and dismantling of the components is a complex task requiring skilled manpower.
- FIG. 1 shows a pump assembly as known in the prior art.
- FIG. 2 shows a pump assembly having an integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
- FIG. 3 shows a plan view of the integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
- FIG. 4 shows a sectional view of the pump assembly with the integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
- Fig. 5 shows a detailed view showing the point of connection of integrated connecting frame with bearing cover and bearing frame, in accordance with an implementation of the present subject matter.
- the present subject matter relates to an integrated connecting frame with bearing cover for a pump assembly.
- the integrated connecting frame with bearing cover is also interchangeably referred to as integrated frame herein.
- the pump assembly may be a centrifugal pump assembly.
- Fig. 1 shows a pump assembly 100 as known in the prior art.
- the pump assembly 100 may be a centrifugal pump assembly.
- the pump assembly 100 includes a casing 102, which houses an impeller, a stuffing box, and related components.
- the casing 102 is connected to a bearing frame 104 through a connecting frame 106. Accordingly, one end of the connecting frame 106 would be connected to the bearing frame 104 and the other end would be connected to the casing 102.
- a bearing cover 108 is first coupled to the connecting frame 106 and then coupled to the bearing frame 104. The function of the bearing cover 108 is to protect the bearings from the entry of foreign particles and collect the oil spillage.
- a shaft (not shown in the figure) would pass through the central openings provided in the bearing frame 104, the bearing cover 108, and the connecting frame 106 and would be connected to the impeller in the casing 102 at one end. Other end of the shaft would be connected to and received drive from a motor (not shown in the figure).
- a typical bearing cover 108 as shown in the figure includes a concentric groove 110 around the central opening to coincide with the bearings in the bearing frame to protect the bearings and collect oil spillage.
- the connecting frame 106 includes cut-out portions 112 on a connecting member 114 to connect to the casing 102. Further, as can be seen, for assembling the pump assembly 100, the various components have to be precisely assembled together.
- the present subject matter provides an integrated connecting frame with bearing cover having an oil spill passage in a single component.
- This integral structure of connecting frame with bearing cover can hold the oil seal and deflector.
- the integrated frame connects the casing of the pump assembly at one end and bearing frame at the other end.
- the integrated connecting frame with bearing cover is a single component structure, it reduces the weight and number of components present in the machinery and it will reduce the assembly time and also reduce the inventory.
- the oil spill passage provided in the integrated bearing cover of the integrated frame helps splashed oil to reenter the bearing frame and does not allow oil to get stagnant.
- FIG. 2 shows a pump assembly 200 having integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
- the pump assembly 200 may be a centrifugal pump assembly.
- the pump assembly 200 includes the casing 102, which houses an impeller, a stuffing box, and related components.
- the casing 102 is connected to a bearing frame 104 through an integrated connecting frame with bearing cover 202.
- the integrated connecting frame with bearing cover 202 is also referred to as integrated frame 202 for ease of discussion.
- a first end of the integrated frame 202 would be connected to the bearing frame 104 and a second end would be connected to the casing 102.
- an integrated bearing cover 204 hereinafter also referred to as bearing cover 204, is provided around a central opening 206 of the integrated frame 202.
- the connecting member 114 is provided to connect to the casing 102.
- a shaft (not shown in the figure) would pass through the central openings provided in the bearing frame 104 and integrated frame 202 and would be connected to the impeller in the casing 102 at one end. Other end of the shaft would be connected to and received drive from a motor (not shown in the figure).
- the central opening 206 of the integrated frame 202 is made of sufficient size to just accommodate the shaft and does not have to be made larger in size. As a result, leakage of pumping fluid can be reduced.
- the integrated bearing cover 204 includes a plurality of protrusions 208 spaced by slots 210, which help in collecting oil spillage and allowing splashed oil to re-enter the bearing frame 104 as will be discussed later.
- a cylindrical member 212 is provided in the integrated bearing cover 204 to define the central opening 206 and allow easy mounting of the integrated frame 202 on the shaft of the pump assembly 200.
- the integrated bearing cover 204 is provided concentric to the cylindrical member 212 in this example.
- FIG. 3 shows a plan view of the integrated connecting frame with bearing cover 202, in accordance with an implementation of the present subject matter.
- the integrated bearing cover 204 is provided concentric to the central opening 206 at the first end of the integrated frame 202, while at the second end the integrated frame 202 includes the connecting member 114 having the cut-out portions 112 for connecting to the casing 102.
- the integrated frame 202 has three ribs in one example. The ribs connect the integrated bearing cover 204 at the first end to the connecting member 114 at the second end.
- a first rib 302 may be aligned perpendicular to a longitudinal axis of the shaft (not shown in the figure). Remaining two ribs 304 and 306 may be referred to as a pair of ribs. Each rib of the pair of ribs 304 and 306 may be aligned at 45 degrees on both sides of the longitudinal axis so that the liquid leaked during pump rotation can get drained out and does not get stagnant in the integrated frame 202, thereby reducing the corrosion effect.
- provisions such as holes 308, are provided for fastening the integrated bearing cover 204, and thereby the integrated frame 202, with the bearing frame 104,
- the fastening may be performed using bolts.
- the integrated bearing cover 204 includes a plurality of protrusions 208-1, 208-2, 208-3, and 208-4 spaced by slots 210-1, 210-2, 210-3, and 210-4. While in this example implementation, four protrusions and slots are provided, it will be understood that the number of protrusions and slots can be varied, for example, based on diameter of central opening 206, etc.
- Each of the protrusions 208 has a curved profile that helps in collecting the oil spillage from the bearing frame 104 and directs splashed oil towards the slots 210. Further, each of the slots 210 are substantially U-shaped with tapered edges that direct the splashed oil back into the bearing frame 104 and do not allow oil to get stagnant, thereby reducing the need for cleaning and maintenance. This is further discussed with reference to Figs. 4 and 5.
- FIG. 4 shows a sectional view of a pump assembly 400 with an integrated connecting frame with bearing cover 202, in accordance with an implementation of the present subject matter.
- the pump assembly 400 includes the casing 102 housing a stuffing box 402 and an impeller 404 among other components.
- the casing 102 is connected to the integrated frame 202, which is in turn connected to the bearing frame 104.
- a shaft 406 passes through the bearing frame 104 and the integrated frame 202 is coupled to the impeller 404.
- the integrated bearing cover 204 covers the bearings 408 in the bearing frame 104.
- FIG. 5 shows a detailed view of section B of Fig. 4 showing the point of connection of the integrated connecting frame with bearing cover 202 and the bearing frame 104, in accordance with an implementation of the present subject matter.
- the central opening 206 (not marked in this figure) of the integrated frame 202 holds an oil seal 502 and a deflector 504 to control oil spillage.
- the oil seal 502 and the deflector 504 are mounted on the shaft 406.
- One of the slot from the slots 210 of the integrated bearing cover 204 in the integrated frame 202 is aligned with an oil passage 506, which is located at the lower end of the bearing frame 104.
- the oil passage 506 provides a passage for re-entry of the oil and the edges of the slots 210 are tapered to ensure that the oil does not get stagnant in the integrated bearing cover 204 but flows into the oil passage 506.
- the present subject matter provides a generally improved pump assembly, such as a centrifugal pump assembly, with the integrated connecting frame with bearing cover that reduces the work of assembling and provides a more solid structure to the equipment.
- the integrated connecting frame with bearing cover also provides slotted passage in the integrated bearing cover which allows the re-entry of the oil splashed in the oil chamber. It reduces weight of the pump, reduces complexity in assembling and dismantling the pump, and reduces inventory costs. Further, maintenance of the pump is also easier.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present subject matter relates to an integrated connecting frame with bearing cover. An integrated frame (202) for a centrifugal pump assembly (200) comprises an integrated bearing cover (204) at a first end of the integrated frame (202) to connect to a bearing frame (104) of the centrifugal pump assembly (200) and a connecting member (114) at a second end of the integrated frame (202) to connect to a casing (102) of the centrifugal pump assembly (200). The integrated bearing cover (204) is provided concentric to a cylindrical member (212) defining a central opening (206) at the first end.
Description
INTEGRATED CONNECTING FRAME WITH BEARING COVER
TECHNICAL FIELD
[0001] The present subject matter relates, in general, to connecting frame of pump assembly, and in particular to a centrifugal pump assembly with an integrated connecting frame with bearing cover.
BACKGROUND
[0002] Centrifugal pump assemblies generally include a number of components that work together to transfer energy from a rotor to a fluid. For example, centrifugal pump assemblies typically include an impeller, a stuffing box, a shaft, and a motor that are mounted in various housings/ casings and connected through various bearings, frames, etc. Assembling and dismantling of the components is a complex task requiring skilled manpower.
BRIEF DESCRIPTION OF DRAWINGS
[0003] The detailed description is given with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and components.
[0004] Fig. 1 shows a pump assembly as known in the prior art.
[0005] Fig. 2 shows a pump assembly having an integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
[0006] Fig. 3 shows a plan view of the integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
[0007] Fig. 4 shows a sectional view of the pump assembly with the integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter.
[0008] Fig. 5 shows a detailed view showing the point of connection of integrated connecting frame with bearing cover and bearing frame, in accordance with an implementation of the present subject matter.
DETAILED DESCRIPTION
[0009] The present subject matter relates to an integrated connecting frame with bearing cover for a pump assembly. The integrated connecting frame with bearing cover is also interchangeably referred to as integrated frame herein. In one example, the pump assembly may be a centrifugal pump assembly.
[0010] Generally, in a pump assembly, the various components have to be assembled together in a particular order to ensure proper functioning of the pump and minimize leakage of pumping fluid and lubricating oil. Hence, assembling and dismantling of pump is a complex task.
[0011] Fig. 1 shows a pump assembly 100 as known in the prior art. The pump assembly 100 may be a centrifugal pump assembly. The pump assembly 100 includes a casing 102, which houses an impeller, a stuffing box, and related components. The casing 102 is connected to a bearing frame 104 through a connecting frame 106. Accordingly, one end of the connecting frame 106 would be connected to the bearing frame 104 and the other end would be connected to the casing 102. During assembly, a bearing cover 108 is first coupled to the connecting frame 106 and then coupled to the bearing frame 104. The function of the bearing cover 108 is to protect the bearings from the entry of foreign particles and collect the oil spillage.
[0012] A shaft (not shown in the figure) would pass through the central openings provided in the bearing frame 104, the bearing cover 108, and the connecting frame 106 and would be connected to the impeller in the casing 102 at one end. Other end of the shaft would be connected to and received drive from a motor (not shown in the figure).
[0013] A typical bearing cover 108 as shown in the figure includes a concentric groove 110 around the central opening to coincide with the bearings in the bearing frame to protect the bearings and collect oil spillage. However, the
splashed oil tends to get stagnant in the concentric groove 110 and requires cleaning/ maintenance. The connecting frame 106 includes cut-out portions 112 on a connecting member 114 to connect to the casing 102. Further, as can be seen, for assembling the pump assembly 100, the various components have to be precisely assembled together.
[0014] The present subject matter provides an integrated connecting frame with bearing cover having an oil spill passage in a single component. This integral structure of connecting frame with bearing cover can hold the oil seal and deflector. The integrated frame connects the casing of the pump assembly at one end and bearing frame at the other end. As the integrated connecting frame with bearing cover is a single component structure, it reduces the weight and number of components present in the machinery and it will reduce the assembly time and also reduce the inventory. Moreover, the oil spill passage provided in the integrated bearing cover of the integrated frame helps splashed oil to reenter the bearing frame and does not allow oil to get stagnant.
[0015] Fig. 2 shows a pump assembly 200 having integrated connecting frame with bearing cover, in accordance with an implementation of the present subject matter. The pump assembly 200 may be a centrifugal pump assembly. The pump assembly 200 includes the casing 102, which houses an impeller, a stuffing box, and related components. The casing 102 is connected to a bearing frame 104 through an integrated connecting frame with bearing cover 202. The integrated connecting frame with bearing cover 202 is also referred to as integrated frame 202 for ease of discussion.
[0016] A first end of the integrated frame 202 would be connected to the bearing frame 104 and a second end would be connected to the casing 102. At the first end of the integrated frame, an integrated bearing cover 204, hereinafter also referred to as bearing cover 204, is provided around a central opening 206 of the integrated frame 202. As a result, there is no separate assembly/ dismantling of the bearing cover 204 required during assembling/ dismantling process. At the second end of the integrated frame 202, the connecting member 114 is provided to connect to the casing 102.
[0017] A shaft (not shown in the figure) would pass through the central openings provided in the bearing frame 104 and integrated frame 202 and would be connected to the impeller in the casing 102 at one end. Other end of the shaft would be connected to and received drive from a motor (not shown in the figure).
[0018] As the integrated bearing cover 204 is provided on the integrated frame 202, the central opening 206 of the integrated frame 202 is made of sufficient size to just accommodate the shaft and does not have to be made larger in size. As a result, leakage of pumping fluid can be reduced.
[0019] Further, the integrated bearing cover 204 includes a plurality of protrusions 208 spaced by slots 210, which help in collecting oil spillage and allowing splashed oil to re-enter the bearing frame 104 as will be discussed later. In one example, a cylindrical member 212 is provided in the integrated bearing cover 204 to define the central opening 206 and allow easy mounting of the integrated frame 202 on the shaft of the pump assembly 200. Thus, the integrated bearing cover 204 is provided concentric to the cylindrical member 212 in this example.
[0020] Fig. 3 shows a plan view of the integrated connecting frame with bearing cover 202, in accordance with an implementation of the present subject matter.
[0021] In one example, the integrated bearing cover 204 is provided concentric to the central opening 206 at the first end of the integrated frame 202, while at the second end the integrated frame 202 includes the connecting member 114 having the cut-out portions 112 for connecting to the casing 102. The integrated frame 202 has three ribs in one example. The ribs connect the integrated bearing cover 204 at the first end to the connecting member 114 at the second end.
[0022] In one example, a first rib 302 may be aligned perpendicular to a longitudinal axis of the shaft (not shown in the figure). Remaining two ribs 304 and 306 may be referred to as a pair of ribs. Each rib of the pair of ribs 304 and 306 may be aligned at 45 degrees on both sides of the longitudinal axis so that the
liquid leaked during pump rotation can get drained out and does not get stagnant in the integrated frame 202, thereby reducing the corrosion effect.
[0023] Also, provisions, such as holes 308, are provided for fastening the integrated bearing cover 204, and thereby the integrated frame 202, with the bearing frame 104, For example, the fastening may be performed using bolts.
[0024] As shown in the figure, the integrated bearing cover 204 includes a plurality of protrusions 208-1, 208-2, 208-3, and 208-4 spaced by slots 210-1, 210-2, 210-3, and 210-4. While in this example implementation, four protrusions and slots are provided, it will be understood that the number of protrusions and slots can be varied, for example, based on diameter of central opening 206, etc.
[0025] Each of the protrusions 208 has a curved profile that helps in collecting the oil spillage from the bearing frame 104 and directs splashed oil towards the slots 210. Further, each of the slots 210 are substantially U-shaped with tapered edges that direct the splashed oil back into the bearing frame 104 and do not allow oil to get stagnant, thereby reducing the need for cleaning and maintenance. This is further discussed with reference to Figs. 4 and 5.
[0026] Fig. 4 shows a sectional view of a pump assembly 400 with an integrated connecting frame with bearing cover 202, in accordance with an implementation of the present subject matter.
[0027] The pump assembly 400 includes the casing 102 housing a stuffing box 402 and an impeller 404 among other components. The casing 102 is connected to the integrated frame 202, which is in turn connected to the bearing frame 104. A shaft 406 passes through the bearing frame 104 and the integrated frame 202 is coupled to the impeller 404. The integrated bearing cover 204 covers the bearings 408 in the bearing frame 104.
[0028] Fig. 5 shows a detailed view of section B of Fig. 4 showing the point of connection of the integrated connecting frame with bearing cover 202 and the bearing frame 104, in accordance with an implementation of the present subject matter.
[0029] The central opening 206 (not marked in this figure) of the integrated frame 202 holds an oil seal 502 and a deflector 504 to control oil spillage. The oil
seal 502 and the deflector 504 are mounted on the shaft 406. One of the slot from the slots 210 of the integrated bearing cover 204 in the integrated frame 202 is aligned with an oil passage 506, which is located at the lower end of the bearing frame 104. The oil passage 506 provides a passage for re-entry of the oil and the edges of the slots 210 are tapered to ensure that the oil does not get stagnant in the integrated bearing cover 204 but flows into the oil passage 506.
[0030] Thus, the present subject matter provides a generally improved pump assembly, such as a centrifugal pump assembly, with the integrated connecting frame with bearing cover that reduces the work of assembling and provides a more solid structure to the equipment. The integrated connecting frame with bearing cover also provides slotted passage in the integrated bearing cover which allows the re-entry of the oil splashed in the oil chamber. It reduces weight of the pump, reduces complexity in assembling and dismantling the pump, and reduces inventory costs. Further, maintenance of the pump is also easier.
[0031] Although implementations for integrated connecting frame with bearing cover have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features are disclosed as example implementations
Claims
1. An integrated frame (202) for a centrifugal pump assembly (200), the integrated frame (202) comprising:
an integrated bearing cover (204) at a first end of the integrated frame (202) to connect to a bearing frame (104) of the centrifugal pump (200), wherein the integrated bearing cover (204) is provided concentric to a cylindrical member (212) defining a central opening (206) at the first end; and a connecting member (114) at a second end of the integrated frame (202) to connect to a casing (102) of the centrifugal pump assembly (200).
2. The integrated frame (202) as claimed in claim 1, wherein the integrated bearing cover (204) includes a plurality of protrusions (208) spaced by slots (210).
3. The integrated frame (202) as claimed in claim 2, wherein each of the plurality of protrusions (208) has a curved profile.
4. The integrated frame (202) as claimed in claim 2, wherein each of the slots (210) is substantially U-shaped with tapered edges.
5. The integrated frame (202) as claimed in claim 2, wherein at least one of the slots (210) is to be aligned to an oil passage (506) in the bearing frame (104) to allow splashed oil to re-enter the bearing frame (104).
6. The integrated frame (202) as claimed in claim 1, comprising a first rib (302) to be aligned perpendicular to a longitudinal axis of a shaft (406) of the centrifugal pump assembly (200) and a pair of ribs (304, 306), each rib in the pair of ribs to be aligned at 45 degrees on both sides of the longitudinal axis of the shaft (406).
7. A centrifugal pump assembly (200) comprising the integrated frame (202) as claimed in any one of the claims 1-6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN201841028844 | 2018-07-31 | ||
IN201841028844 | 2018-07-31 |
Publications (1)
Publication Number | Publication Date |
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WO2020026263A1 true WO2020026263A1 (en) | 2020-02-06 |
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ID=69232403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/IN2019/050495 WO2020026263A1 (en) | 2018-07-31 | 2019-07-03 | Integrated connecting frame with bearing cover |
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WO (1) | WO2020026263A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841791A (en) * | 1972-05-30 | 1974-10-15 | Worthington Corp | Adaptor and frame for a centrifugal pump |
US8662551B2 (en) * | 2008-06-13 | 2014-03-04 | Weir Minerals Australia Ltd. | Improvements relating to pump seal assemblies |
-
2019
- 2019-07-03 WO PCT/IN2019/050495 patent/WO2020026263A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3841791A (en) * | 1972-05-30 | 1974-10-15 | Worthington Corp | Adaptor and frame for a centrifugal pump |
US8662551B2 (en) * | 2008-06-13 | 2014-03-04 | Weir Minerals Australia Ltd. | Improvements relating to pump seal assemblies |
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