CA1251690A - Pump drive assembly - Google Patents
Pump drive assemblyInfo
- Publication number
- CA1251690A CA1251690A CA000477718A CA477718A CA1251690A CA 1251690 A CA1251690 A CA 1251690A CA 000477718 A CA000477718 A CA 000477718A CA 477718 A CA477718 A CA 477718A CA 1251690 A CA1251690 A CA 1251690A
- Authority
- CA
- Canada
- Prior art keywords
- drive shaft
- housing
- pump
- flexible
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
Abstract A Pump Drive Assembly A pump drive assembly is provided which is suitable for use with helical rotor pump of the fully submerged type.
The assembly comprises a drive shaft and flexible joints, a pump connecting means with an attached housing and a flexible sealing means having an aperture through which the drive shaft extends. When used submerged in dangerous or corrosive fluids the design provides protection for the flexible joints.
The assembly comprises a drive shaft and flexible joints, a pump connecting means with an attached housing and a flexible sealing means having an aperture through which the drive shaft extends. When used submerged in dangerous or corrosive fluids the design provides protection for the flexible joints.
Description
9o A Pump Drive Assembly This invention relates to a pump drive assembly and a pump installation. In particular, the invention relates to a pump drive assembly suitable for use with a helical rotor pump and suitable for use fully submerged in dangerous or corrosive fluids.
South African Patent 78/2199 discloses a pump drive assembly in which a flexible joint connecting a drive shaft to a pump rotor is covered by a housing which is secured to the flexible joint at one end and its other end ls open or is closed by a boot $ecured to the drive shaft.
The drive shaft in the specific embodiment of the patent is vertically oriented. With the present invention, the other end of the housing is sealed off against a stationary support plate having an aperture through which the drive shaft extends.
Thus, according to the invention there is provided a drive shaft;
a first flexible joint at one end of the drive shaft for transmitting rotary motion to a pump rotor;
a connecting means for connecting ~he first flexible joint to the pump rotor;
a housing fast with the connecting means to be rotatable together with the drive shaft and the first flexible joint, which encloses at least the first flexible joint; and a flexible sealing means engaged with the housing and engageable with a stationary support member having an aperture wherethrough the drive shaft extends in use, to close the aperture.
The invention extends to a pump installation which comprises a pump drive assembly in accordance with the invention, a rotor connected to the connecting means thereof, ~h - 12S169~
South African Patent 78/2199 discloses a pump drive assembly in which a flexible joint connecting a drive shaft to a pump rotor is covered by a housing which is secured to the flexible joint at one end and its other end ls open or is closed by a boot $ecured to the drive shaft.
The drive shaft in the specific embodiment of the patent is vertically oriented. With the present invention, the other end of the housing is sealed off against a stationary support plate having an aperture through which the drive shaft extends.
Thus, according to the invention there is provided a drive shaft;
a first flexible joint at one end of the drive shaft for transmitting rotary motion to a pump rotor;
a connecting means for connecting ~he first flexible joint to the pump rotor;
a housing fast with the connecting means to be rotatable together with the drive shaft and the first flexible joint, which encloses at least the first flexible joint; and a flexible sealing means engaged with the housing and engageable with a stationary support member having an aperture wherethrough the drive shaft extends in use, to close the aperture.
The invention extends to a pump installation which comprises a pump drive assembly in accordance with the invention, a rotor connected to the connecting means thereof, ~h - 12S169~
- 2 - AECI 534 and a hopper which has a wall portion that constitutes the support member.
The flexible sealing means conveniently comprises a mounting element that is mounted on the housing such that the housing is rotatable therein, a flexible boot secured to the stationary member and the mounting element and a seal for effecting sealing between the mounting element and the housing.
The housing may have screw conveyor formations secured thereon.
A bearing unit may be secured to the outside of the support member in which an input shaft is rotatably supported, there being a second flexible joint connecting the input and drive sha~ts.
The invention is now described, by way of an example, with reference to the accompanying drawing which shows a part schematic view of a pump installation including a pump drive assembly in accordance with the invention.
Referring to the drawing, reference numeral 10 generally designates a pump installation which includes a pump drive assembly 12 in accordance with the invention.
The installation 10 has a helical stator 1~ and a helical rotor 16, only part of which is shown. The rotor 16 is driven by means of a drive shaft 18 via an input shaft 20.
The drive shaft 18 is connected to the input shaft 20 by means of a flexible joint 22 and to the rotor 16 by means of a further flexible ~oint 24 via a boss 23. A housing 26 is fast with the rotor 16 and covers at least a part of the drive shaft 18. Flights 28 are secured to the housing 26 to form a screw conveyor. The shafts 18 and 20 and the housin~
26 are horizontally oriented.
The housing 26 with the flights 28 is located at the bottom of a hopper 30 which is partly defined by a vertical wall portion 32. The wall portion 32 has an aperture 3~
'LZS1t~90
The flexible sealing means conveniently comprises a mounting element that is mounted on the housing such that the housing is rotatable therein, a flexible boot secured to the stationary member and the mounting element and a seal for effecting sealing between the mounting element and the housing.
The housing may have screw conveyor formations secured thereon.
A bearing unit may be secured to the outside of the support member in which an input shaft is rotatably supported, there being a second flexible joint connecting the input and drive sha~ts.
The invention is now described, by way of an example, with reference to the accompanying drawing which shows a part schematic view of a pump installation including a pump drive assembly in accordance with the invention.
Referring to the drawing, reference numeral 10 generally designates a pump installation which includes a pump drive assembly 12 in accordance with the invention.
The installation 10 has a helical stator 1~ and a helical rotor 16, only part of which is shown. The rotor 16 is driven by means of a drive shaft 18 via an input shaft 20.
The drive shaft 18 is connected to the input shaft 20 by means of a flexible joint 22 and to the rotor 16 by means of a further flexible ~oint 24 via a boss 23. A housing 26 is fast with the rotor 16 and covers at least a part of the drive shaft 18. Flights 28 are secured to the housing 26 to form a screw conveyor. The shafts 18 and 20 and the housin~
26 are horizontally oriented.
The housing 26 with the flights 28 is located at the bottom of a hopper 30 which is partly defined by a vertical wall portion 32. The wall portion 32 has an aperture 3~
'LZS1t~90
- 3 - AECI 534 through which the drive shaft 18 extends. As shown in the drawing, a bearing housing 36 is secured to the wall portion 32 and carries bearings 38 which support the input shaft 20.
It will be appreciated that, in use r the rotor 16 rotates with eccentricity such that it moves bodily from side to side in a direction normal to its axis of rotation while it rotates about said axis of rotation. Thus, the drive shaft 18 and housing 26 will also move about from side to side as the drive shaft 18 and housing 26 rotates. A flexible sealing means 40 is accordingly provided to close off the aperture 34.
Thus, the flexible sealing means 40 comprises a sleeve 42 which is rotatably mounted on the housing 26t a flexible boot 44 which is secured at one end to the wall portion 32 and at its other end to the sleeve 42, a mechanical seal formed by two sealing rings 46 and a spring 48 for urging the mechanical seals 46 against the sleeve 42.
It will accordingly be appreciated that the flexible joints 22 and 24 are protected from dangerous or corrosive fluids. Further, if the flexible sealing means 40 should fail in any way, then the fluid will leak out through the aperture 34 and the presence of a leak will be detected substantially immediately.
It will be appreciated that, in use r the rotor 16 rotates with eccentricity such that it moves bodily from side to side in a direction normal to its axis of rotation while it rotates about said axis of rotation. Thus, the drive shaft 18 and housing 26 will also move about from side to side as the drive shaft 18 and housing 26 rotates. A flexible sealing means 40 is accordingly provided to close off the aperture 34.
Thus, the flexible sealing means 40 comprises a sleeve 42 which is rotatably mounted on the housing 26t a flexible boot 44 which is secured at one end to the wall portion 32 and at its other end to the sleeve 42, a mechanical seal formed by two sealing rings 46 and a spring 48 for urging the mechanical seals 46 against the sleeve 42.
It will accordingly be appreciated that the flexible joints 22 and 24 are protected from dangerous or corrosive fluids. Further, if the flexible sealing means 40 should fail in any way, then the fluid will leak out through the aperture 34 and the presence of a leak will be detected substantially immediately.
Claims (5)
1. A pump drive assembly which comprises a drive shaft;
a first flexible joint at one end of the drive shaft for transmitting rotary motion to a pump rotor;
a connecting means for connecting the first flexible joint to the pump rotor;
a housing fast with the connecting means to be rotatable together with the drive shaft and the first flexible joint, which encloses at least the first flexible joint; and a flexible sealing means engaged with the housing and engageable with a stationary support member having an aperture wherethrough the drive shaft extends in use, to close the aperture.
a first flexible joint at one end of the drive shaft for transmitting rotary motion to a pump rotor;
a connecting means for connecting the first flexible joint to the pump rotor;
a housing fast with the connecting means to be rotatable together with the drive shaft and the first flexible joint, which encloses at least the first flexible joint; and a flexible sealing means engaged with the housing and engageable with a stationary support member having an aperture wherethrough the drive shaft extends in use, to close the aperture.
2. The assembly as claimed in Claim 1, in which the flexible sealing means comprises a mounting element with which the housing is rotatably mounted;
a flexible boot secured to the mounting element and securable to the support member about the aperture; and a seal between the mounting element and the housing for effecting sealing therebetween.
a flexible boot secured to the mounting element and securable to the support member about the aperture; and a seal between the mounting element and the housing for effecting sealing therebetween.
3. The assembly as claimed in Claim 1, in which the housing has screw conveyor formations on its outer surface.
4. The assembly as claimed in Claims 1, 2 or 3, which further comprises a bearing unit engageable with the support member;
an input shaft rotatably mounted in the bearing unit;
and a second flexible joint connecting the input shaft and the drive shaft.
an input shaft rotatably mounted in the bearing unit;
and a second flexible joint connecting the input shaft and the drive shaft.
5. A pump installation which comprises a pump drive assembly as claimed in Claims 1, 2 or 3;
a rotor connected to the connecting means; and a hopper, a wall portion of which constitutes the support member.
a rotor connected to the connecting means; and a hopper, a wall portion of which constitutes the support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000477718A CA1251690A (en) | 1984-04-17 | 1985-03-27 | Pump drive assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA84/2885 | 1984-04-17 | ||
| CA000477718A CA1251690A (en) | 1984-04-17 | 1985-03-27 | Pump drive assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1251690A true CA1251690A (en) | 1989-03-28 |
Family
ID=4130138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000477718A Expired CA1251690A (en) | 1984-04-17 | 1985-03-27 | Pump drive assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1251690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370179A (en) * | 1993-07-13 | 1994-12-06 | Mills; Robert A. R. | Drive head for rotary down hole pump |
-
1985
- 1985-03-27 CA CA000477718A patent/CA1251690A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370179A (en) * | 1993-07-13 | 1994-12-06 | Mills; Robert A. R. | Drive head for rotary down hole pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |