CN109356858B - Centrifugal low-temperature liquid pump - Google Patents
Centrifugal low-temperature liquid pump Download PDFInfo
- Publication number
- CN109356858B CN109356858B CN201811439734.4A CN201811439734A CN109356858B CN 109356858 B CN109356858 B CN 109356858B CN 201811439734 A CN201811439734 A CN 201811439734A CN 109356858 B CN109356858 B CN 109356858B
- Authority
- CN
- China
- Prior art keywords
- sealing
- pump
- low
- bearing
- temperature
- 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.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 129
- 238000007664 blowing Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000001050 lubricating effect Effects 0.000 abstract description 16
- 239000004519 grease Substances 0.000 abstract description 13
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
- F04D29/06—Lubrication
- F04D29/061—Lubrication 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
- F04D29/08—Sealings
- F04D29/086—Sealings 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal cryogenic liquid pump, comprising: the inner part of the pump shell is provided with an impeller, a pump shaft movably supported in the bearing box, and a motor, an output shaft of the motor is connected with one end of the pump shaft, the other end of the motor is connected with the impeller, and a normal temperature end air inlet hole and a normal temperature end air outlet hole which are communicated with a bearing cavity in the bearing box are arranged on the side wall of the normal temperature end of the bearing box; the inner side end face of the low-temperature end bearing end cover is provided with a circle of annular grooves corresponding to the low-temperature end sealing bearing, the annular grooves of the low-temperature end bearing end cover and the low-temperature end sealing bearing form an annular sealing chamber together, the low Wen Duanzhou bearing end cover is provided with a low-temperature end air inlet hole and a low-temperature end air outlet hole which are communicated with the annular sealing chamber, and the low-temperature end air inlet hole and the normal-temperature end air inlet hole are simultaneously communicated with a normal-temperature sealing air source. The invention has the advantages that: the grease used for lubricating the low-temperature end sealing bearing of the bearing box can be prevented from frost, and the heat dissipation speed of heat in the bearing cavity of the bearing box can be improved.
Description
Technical Field
The invention relates to the technical field of low-temperature cryogenic medium conveying equipment, in particular to a centrifugal low-temperature liquid pump.
Background
The centrifugal cryogenic liquid pump is a common device for conveying cryogenic medium, and is widely applied to industries such as petroleum, chemical industry, metallurgy, steel and the like. The structure of the centrifugal cryogenic liquid pump currently used includes: the motor is internally provided with a pump shell of the impeller, a motor, a pump shaft and a bearing box, wherein a bearing cavity which axially penetrates through the bearing box is arranged in the bearing box, one end, close to the pump shell, of the bearing box is a low-temperature end of the bearing box, one end, close to the motor, of the bearing box is a normal-temperature end of the bearing box, a low-temperature end sealing bearing is arranged in the bearing cavity at the low-temperature end of the bearing box, a normal-temperature end sealing bearing is arranged in the bearing cavity at the normal-temperature end of the bearing box, a low-temperature end bearing end cover is arranged at the low-temperature end of the bearing box, a normal-temperature end bearing end cover is arranged at the normal-temperature end of the bearing box, the pump shaft sequentially penetrates through the low-temperature end bearing end cover, the two sealing bearings and the normal-temperature end bearing end cover to be movably supported in the bearing box, one end of the pump shaft stretches into the pump shell and is coaxially connected with the impeller, and the other end of the pump shaft is coaxially connected with an output shaft of the motor. During the use of a centrifugal low-temperature liquid pump, lubricating grease is generally used for lubricating a bearing in a bearing box; in the using process flow of the centrifugal low-temperature liquid pump, a cold pump process flow exists, namely: and low-temperature liquid is introduced into the pump in the state of stopping the pump, so that the temperature in the pump shell is gradually reduced, thereby preventing the low-temperature liquid from being largely vaporized in the operation process of the pump and avoiding cavitation of the pump shell. The centrifugal cryogenic liquid pumps currently in use have the following disadvantages: (1) Because the temperature of the low-temperature liquid to be conveyed is too low, the lubricating grease used for lubricating the low-temperature end sealing bearing at the low-temperature end of the bearing box is extremely easy to frost due to the severe low temperature no matter the centrifugal low-temperature liquid pump is operated or in a cold pump state, so that the lubricating grease cannot effectively perform a lubricating effect, and then equipment is damaged, and the use safety and stability of the equipment are affected; (2) The normal temperature end of the bearing box is far away from the pump shell and cannot be affected by low temperature of the pump shell, but the bearing cavity is a relatively sealed cavity, and heat generated in the process of contacting the pump shaft with the normal temperature end sealing bearing in the bearing cavity is not easy to dissipate, so that the heat dissipation speed is extremely slow, and the use safety and stability of equipment are affected.
Disclosure of Invention
The invention aims to provide a centrifugal cryogenic liquid pump with high use safety and stability.
In order to achieve the above purpose, the invention adopts the following technical scheme: the centrifugal cryogenic liquid pump comprises: the pump comprises a pump shell, a pump shaft and a motor, wherein the pump shell is internally provided with an impeller, the pump shaft is movably supported in a bearing box, an output shaft of the motor is coaxially connected with one end of the pump shaft, the other end of the pump shaft is coaxially connected with the impeller in the pump shell, a normal temperature end air inlet hole and a normal temperature end air outlet hole which are communicated with a bearing cavity in the bearing box are formed in the side wall of the normal temperature end of the bearing box, and the normal temperature end air inlet hole is communicated with a normal temperature sealing air source through a cold blowing pipeline; the inner side end face of the low-temperature end bearing end cover is provided with a circle of annular grooves corresponding to the low-temperature end sealing bearing, the annular grooves of the low-temperature end bearing end cover and the low-temperature end sealing bearing form an annular sealing chamber together, the low Wen Duanzhou bearing end cover is provided with a low-temperature end air inlet hole and a low-temperature end air outlet hole which are communicated with the annular sealing chamber, and the low-temperature end air inlet hole is communicated with a normal-temperature sealing air source through a hot blowing pipeline.
Further, the aforementioned centrifugal cryogenic liquid pump, wherein: the hot blowing pipeline is provided with a flow regulating valve.
Further, the aforementioned centrifugal cryogenic liquid pump, wherein: the cold blowing pipeline is also provided with a flow regulating valve.
Further, the aforementioned centrifugal cryogenic liquid pump, wherein: a mechanical sealing mechanism for sealing a gap between the pump shell and the pump shaft is arranged at the joint of the pump shell and the pump shaft, and the structure of the mechanical sealing mechanism comprises: the pump comprises a pump shell, a pump shaft, a pump cover, a sealing ring air inlet, a sealing air pipeline and a normal-temperature sealing air source, wherein the pump shaft at the joint of the pump shell and the pump shaft is sleeved with the sealing ring capable of shielding a gap between the pump cover and the pump shaft, the inner circumferential wall of the sealing ring is provided with a ring-shaped sealing groove, one end of the ring-shaped sealing groove extends along the axial direction and penetrates through the end face of the sealing ring positioned at the side of the pump shell, the ring-shaped sealing groove of the sealing ring, the pump shell and the pump shaft jointly form a ring-shaped sealing cavity, the sealing ring is provided with the sealing ring air inlet communicated with the ring-shaped sealing cavity, and the sealing ring air inlet is communicated with the normal-temperature sealing air source through the sealing air pipeline.
Further, the aforementioned centrifugal cryogenic liquid pump, wherein: a flow regulating valve is arranged on the sealed air pipeline.
Through implementation of the technical scheme, the invention has the beneficial effects that: (1) The low-temperature end and the low-temperature end sealed bearing of the bearing box are insulated by normal-temperature sealing gas, so that the temperature of the low-temperature end and the low-temperature end sealed bearing of the bearing box is always kept at the temperature at which grease cannot frost, the grease used for lubricating the low-temperature end sealed bearing of the bearing box is effectively prevented from frost, the grease can always and effectively play a lubricating role, equipment damage is avoided, and the use safety and stability of the equipment are greatly improved; (2) The heat dissipation speed of the heat in the bearing cavity of the bearing box can be improved, and the use safety and stability of the device are further improved.
Drawings
Fig. 1 is a schematic structural diagram of a centrifugal cryogenic liquid pump according to the present invention.
Fig. 2 is an enlarged schematic view of the H site shown in fig. 1.
Fig. 3 is a schematic view of the structure of the low temperature end bearing cap shown in fig. 1.
Fig. 4 is a schematic structural view of the seal ring shown in fig. 1.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1,2, 3 and 4, the centrifugal cryogenic liquid pump comprises: the pump comprises a pump shell 2, a pump shaft 4 and a motor 5, wherein the pump shell 2 is internally provided with an impeller 1, the pump shaft 4 is movably supported in a bearing box 3, an output shaft of the motor 5 is coaxially connected with one end of the pump shaft 4, the other end of the pump shaft 4 is coaxially connected with the impeller 1 in the pump shell 2, a normal-temperature-end air inlet hole 7 and a normal-temperature-end air outlet hole 8 which are communicated with a bearing cavity 6 in the bearing box 3 are arranged on the side wall of the normal-temperature end of the bearing box, and the normal-temperature-end air inlet hole 7 is communicated with a normal-temperature sealing air source 10 through a cold blowing pipeline 9; an annular groove 13 corresponding to the low-temperature end sealing bearing 12 is formed in the inner side end face of the low-temperature end bearing end cover 11, a first annular sealing chamber 14 is formed by the annular groove 13 of the low-temperature end bearing end cover 11 and the low-temperature end sealing bearing 12, a low-temperature end air inlet hole 15 and a low-temperature end air outlet hole 16 which are communicated with the first annular sealing chamber 14 are formed in the low-temperature end bearing end cover 11, and the low-temperature end air inlet hole 15 is communicated with a normal-temperature sealing air source 10 through a hot blowing pipeline 17; in the embodiment, the first flow regulating valve 18 is arranged on the hot blowing pipeline 17, and the flow rate of the sealing gas entering the bearing cavity 6 is regulated through the first flow regulating valve 18, so that the heat dissipation speed of the normal temperature end of the bearing box can be regulated, the normal temperature end sealing bearing and the bearing box are better protected, and the service life of equipment is prolonged; in the embodiment, the second flow regulating valve 19 is also arranged on the cold blowing pipeline 9, and the flow rate of the sealing gas entering the first annular sealing cavity 14 is regulated by the second flow regulating valve 19, so that the temperature of the low-temperature end of the bearing box can be effectively controlled, the sealing bearing and the bearing box at the low-temperature end are better protected, and the service life of the equipment is prolonged;
In the present embodiment, a mechanical seal mechanism for sealing a gap between the pump casing 2 and the pump shaft 4 is provided at the joint therebetween, and the structure of the mechanical seal mechanism includes: a sealing ring 20 capable of shielding a gap between the pump casing 2 and the pump shaft 4 is sleeved on the pump shaft 4 at the joint of the pump casing 2 and the pump shaft 4, a circle of annular sealing groove 21 is arranged on the inner circumferential wall of the sealing ring 20, one end of the annular sealing groove 21 extends along the axial direction and penetrates through the end face of the sealing ring positioned at the side of the pump casing, the annular sealing groove 21 of the sealing ring 20, the pump casing 2 and the pump shaft 4 jointly form a second annular sealing cavity 22, a sealing ring air inlet hole 23 communicated with the second annular sealing cavity 22 is arranged on the sealing ring 20, and the sealing ring air inlet hole 23 is communicated with a normal-temperature sealing air source 10 through a sealing air pipeline 24; in the present embodiment, a third flow rate adjustment valve 25 is provided on the seal air pipe 24;
the working principle of the invention is as follows:
when the pump works, the motor 5 is started, the motor 5 drives the pump shaft 4 to rotate at a high speed, the pump shaft 4 synchronously drives the impeller 1 to rotate at a high speed, and the impeller 1 rotates to drive the low-temperature cryogenic medium entering the pump shell 2 to perform centrifugal motion, so that the low-temperature cryogenic medium in the pump shell 2 is thrown out of the pump shell 2; in the working process of the centrifugal pump, the normal-temperature sealing gas in the normal-temperature sealing gas source 10 is simultaneously introduced into the cold blowing pipeline 9, the hot blowing pipeline 17 and the sealing gas pipeline 24, wherein the normal-temperature sealing gas introduced into the cold blowing pipeline 9 enters the bearing cavity 6 of the bearing box 3 from the normal-temperature end air inlet hole 7 and is discharged out of the bearing cavity 6 through the normal-temperature end air outlet hole 8, and in the process of discharging the normal-temperature sealing gas out of the bearing cavity 6, the heat in the bearing cavity 6 is simultaneously taken out during the normal-temperature sealing gas discharging, so that the heat dissipation speed of the bearing cavity is accelerated, and the bearing box and the normal-temperature end sealing bearing are better protected;
The normal temperature sealing gas introduced into the hot blowing pipeline 17 enters the first annular sealing chamber 14 through the low temperature end air inlet hole 15 and is discharged from the low temperature end air outlet hole 16, and the normal temperature sealing gas can keep the temperature of the low temperature end of the bearing box and the low temperature end sealing bearing at the temperature that lubricating grease cannot frost all the time due to the existence of the normal temperature sealing gas in the first annular sealing chamber 14, so that the lubricating grease used for lubricating the low temperature end sealing bearing 12 in the low temperature end of the bearing box is effectively prevented from frost, the lubricating grease can always and effectively play a lubricating role, equipment damage is avoided, and the use safety and stability of the equipment are greatly improved; meanwhile, normal-temperature sealing gas introduced into the sealing gas pipeline 24 can enter the second annular sealing chamber 22 through the sealing ring air inlet hole 23 to seal the gap between the pump shell 2 and the pump shaft 4, so that low-temperature liquid in the pump shell 2 is prevented from escaping from the gap between the pump shell 2 and the pump shaft 4, and the use stability and safety of the equipment are further improved.
The invention has the advantages that: (1) The low-temperature end and the low-temperature end sealed bearing of the bearing box are insulated by normal-temperature sealing gas, so that the temperature of the low-temperature end and the low-temperature end sealed bearing of the bearing box is always kept at the temperature at which grease cannot frost, the grease used for lubricating the low-temperature end sealed bearing of the bearing box is effectively prevented from frost, the grease can always and effectively play a lubricating role, equipment damage is avoided, and the use safety and stability of the equipment are greatly improved; (2) The heat dissipation speed of the heat in the bearing cavity of the bearing box can be improved, and the use safety and stability of the device are further improved.
Claims (7)
1.A centrifugal cryogenic liquid pump comprising: the inside pump case that is provided with the impeller, movable support in the pump shaft and the motor in the bearing box, the output shaft and the one end coaxial coupling of pump shaft of motor, the other end and the inside impeller coaxial coupling of pump case of pump shaft, its characterized in that: a normal temperature end air inlet hole and a normal temperature end air outlet hole which are communicated with a bearing cavity in the bearing box are arranged on the side wall of the normal temperature end of the bearing box, and the normal temperature end air inlet hole is communicated with a normal temperature sealing air source through a cold blowing pipeline; the inner side end face of the low-temperature end bearing end cover is provided with a circle of annular grooves corresponding to the low-temperature end sealing bearing, the annular grooves of the low-temperature end bearing end cover and the low-temperature end sealing bearing form an annular sealing chamber together, the low Wen Duanzhou bearing end cover is provided with a low-temperature end air inlet hole and a low-temperature end air outlet hole which are communicated with the annular sealing chamber, and the low-temperature end air inlet hole is communicated with a normal-temperature sealing air source through a hot blowing pipeline.
2. The centrifugal cryogenic liquid pump of claim 1, wherein: the hot blowing pipeline is provided with a flow regulating valve.
3. Centrifugal cryogenic liquid pump according to claim 1 or 2, characterized in that: the cold blowing pipeline is also provided with a flow regulating valve.
4. The centrifugal cryogenic liquid pump of claim 1, wherein: a mechanical sealing mechanism for sealing a gap between the pump shell and the pump shaft is arranged at the joint of the pump shell and the pump shaft, and the structure of the mechanical sealing mechanism comprises: the pump comprises a pump shell, a pump shaft, a pump cover, a sealing ring air inlet, a sealing air pipeline and a normal-temperature sealing air source, wherein the pump shaft at the joint of the pump shell and the pump shaft is sleeved with the sealing ring capable of shielding a gap between the pump cover and the pump shaft, the inner circumferential wall of the sealing ring is provided with a ring-shaped sealing groove, one end of the ring-shaped sealing groove extends along the axial direction and penetrates through the end face of the sealing ring positioned at the side of the pump shell, the ring-shaped sealing groove of the sealing ring, the pump shell and the pump shaft jointly form a ring-shaped sealing cavity, the sealing ring is provided with the sealing ring air inlet communicated with the ring-shaped sealing cavity, and the sealing ring air inlet is communicated with the normal-temperature sealing air source through the sealing air pipeline.
5. The centrifugal cryogenic liquid pump of claim 4, wherein: a flow regulating valve is arranged on the sealed air pipeline.
6. A centrifugal cryogenic liquid pump according to claim 3, characterized in that: a mechanical sealing mechanism for sealing a gap between the pump shell and the pump shaft is arranged at the joint of the pump shell and the pump shaft, and the structure of the mechanical sealing mechanism comprises: the pump comprises a pump shell, a pump shaft, a pump cover, a sealing ring air inlet, a sealing air pipeline and a normal-temperature sealing air source, wherein the pump shaft at the joint of the pump shell and the pump shaft is sleeved with the sealing ring capable of shielding a gap between the pump cover and the pump shaft, the inner circumferential wall of the sealing ring is provided with a ring-shaped sealing groove, one end of the ring-shaped sealing groove extends along the axial direction and penetrates through the end face of the sealing ring positioned at the side of the pump shell, the ring-shaped sealing groove of the sealing ring, the pump shell and the pump shaft jointly form a ring-shaped sealing cavity, the sealing ring is provided with the sealing ring air inlet communicated with the ring-shaped sealing cavity, and the sealing ring air inlet is communicated with the normal-temperature sealing air source through the sealing air pipeline.
7. The centrifugal cryogenic liquid pump of claim 6, wherein: a flow regulating valve is arranged on the sealed air pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811439734.4A CN109356858B (en) | 2018-11-29 | 2018-11-29 | Centrifugal low-temperature liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811439734.4A CN109356858B (en) | 2018-11-29 | 2018-11-29 | Centrifugal low-temperature liquid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109356858A CN109356858A (en) | 2019-02-19 |
| CN109356858B true CN109356858B (en) | 2024-05-14 |
Family
ID=65343079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811439734.4A Active CN109356858B (en) | 2018-11-29 | 2018-11-29 | Centrifugal low-temperature liquid pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109356858B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201547023U (en) * | 2009-10-26 | 2010-08-11 | 中国石油天然气股份有限公司 | Connector of B-type canned motor pump |
| JP2015061981A (en) * | 2015-01-06 | 2015-04-02 | エア・ウォーター株式会社 | Cryogenic liquid pump |
| CN107806417A (en) * | 2017-10-20 | 2018-03-16 | 项达章 | Full chuck single-stage cantilever pump |
| CN108252924A (en) * | 2016-12-28 | 2018-07-06 | 上海佰诺泵阀有限公司 | For conveying the magnetic drive pump of ultralow temperature easy vaporized medium |
| CN108533524A (en) * | 2018-05-18 | 2018-09-14 | 广州市昕恒泵业制造有限公司 | A kind of rotor part of environment-friendly type serum recycle pump group |
| CN209370085U (en) * | 2018-11-29 | 2019-09-10 | 联峰钢铁（张家港）有限公司 | Centrifugal cryogenic liquid pump |
-
2018
- 2018-11-29 CN CN201811439734.4A patent/CN109356858B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201547023U (en) * | 2009-10-26 | 2010-08-11 | 中国石油天然气股份有限公司 | Connector of B-type canned motor pump |
| JP2015061981A (en) * | 2015-01-06 | 2015-04-02 | エア・ウォーター株式会社 | Cryogenic liquid pump |
| CN108252924A (en) * | 2016-12-28 | 2018-07-06 | 上海佰诺泵阀有限公司 | For conveying the magnetic drive pump of ultralow temperature easy vaporized medium |
| CN107806417A (en) * | 2017-10-20 | 2018-03-16 | 项达章 | Full chuck single-stage cantilever pump |
| CN108533524A (en) * | 2018-05-18 | 2018-09-14 | 广州市昕恒泵业制造有限公司 | A kind of rotor part of environment-friendly type serum recycle pump group |
| CN209370085U (en) * | 2018-11-29 | 2019-09-10 | 联峰钢铁（张家港）有限公司 | Centrifugal cryogenic liquid pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109356858A (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201794774U (en) | Mechanical sealing device for hot water pump | |
| CN105351221B (en) | A kind of high temperature high voltage resistant No leakage centrifugal compressor | |
| CN105298863A (en) | Dry-wear-resistant magnetic drive pump | |
| CN206159049U (en) | Split type high temperature magnetic transmission petrochemical industry process pump | |
| CN104864100B (en) | Refrigerant condenser combination sealing system | |
| CN105626570B (en) | A kind of hydrogen turbine pump | |
| CN101354044B (en) | Centrifugal pump suitable for high temperature and high coagulating point medium and its use method | |
| CN203822654U (en) | Stainless steel magnetic drive pump capable of approximate zero inner leakage | |
| CN109356858B (en) | Centrifugal low-temperature liquid pump | |
| CN204553321U (en) | Impeller type pressure adjustable mechanical seal component | |
| CN110211712A (en) | A kind of vertical mixed flow pump for lead bismuth reactor-loop | |
| CN204226640U (en) | For the seal arrangement of High Temperature High Pressure rotating machinery | |
| CN106122037B (en) | A kind of cooling device of high-temperature pump suspension body | |
| CN209370085U (en) | Centrifugal cryogenic liquid pump | |
| CN105386972A (en) | Screw vacuum pump of motive seal structure | |
| CN201599202U (en) | High temperature and high pressure process pump | |
| CN202483895U (en) | Multiple-group magnetic drive pump | |
| CN107882768A (en) | A kind of unsteady flow sealing control method and its device | |
| CN105065269B (en) | Rotary-vane vaccum pump | |
| CN106762682A (en) | A kind of riser formula centrifugal pump | |
| CN105351521B (en) | Sealing device for HTHP rotating machinery | |
| CN208845370U (en) | A kind of centrifugal pump with water-cooled pump cover and sealing gland | |
| CN203114664U (en) | Magnetic transmission non-leakage centrifugal fan | |
| CN108757492B (en) | Vertical centrifugal pump with air dynamic pressure bearing | |
| CN104763674A (en) | Impeller type pressure-adjustable mechanical sealing component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |