CN110942898B - Oil pump oil supplementing method for bullet train traction transformer - Google Patents
Oil pump oil supplementing method for bullet train traction transformer Download PDFInfo
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- CN110942898B CN110942898B CN201911153962.XA CN201911153962A CN110942898B CN 110942898 B CN110942898 B CN 110942898B CN 201911153962 A CN201911153962 A CN 201911153962A CN 110942898 B CN110942898 B CN 110942898B
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- oil
- traction transformer
- oil pump
- thin
- pump
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
- F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
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- 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
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/004—Priming of not self-priming pumps
- F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
A method for supplementing oil to the oil pump of traction transformer of motor-car features that the oil inlet of oil pump of traction transformer is connected via oil tube to the oil tank of traction transformer, the oil outlet of oil pump of traction transformer is connected via oil tube to cooler, the butterfly valves at inlet and outlet of oil channel are closed, the air exhaust plug at top of oil pump of traction transformer is opened, the oil is filled in the oil pump of traction transformer from the air exhaust port of air exhaust plug by oil filler, and the butterfly valves at inlet and outlet of oil channel are opened. According to the invention, under the condition that the butterfly valves at two sides of the traction transformer oil pump are completely closed, the oil is slowly supplemented to the traction transformer oil pump from the exhaust plug at the top of the traction transformer oil pump through the thin-walled pipe, so that the risk that external gas enters the traction transformer can be avoided.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a motor car traction transformer oil pump.
Background
The motor train unit traction transformer is a core component on a high-speed motor train unit and is a power source with important functions of traction, braking, communication and the like of the high-speed motor train unit. The motor train unit traction transformer oil pump is an important part in a motor train unit traction transformer cooling system, and when the traction transformer oil pump breaks down in the operation, the safe operation of the motor train unit traction transformer can be directly influenced, and under severe conditions, the safe operation of a high-speed motor train unit can be directly influenced. Therefore, once the traction transformer oil pump is found to be abnormal, the abnormality needs to be dealt with in time, and the lower traction transformer oil pump can be replaced when necessary. Because the traction transformer oil pump is directly installed on the traction transformer oil path, when the traction transformer oil pump is replaced, butterfly valves at two ends of the traction transformer oil pump need to be closed firstly, then the traction transformer oil pump is drained, then the traction transformer oil pump is detached, and the qualified traction transformer oil pump is replaced.
Before the traction transformer oil pump runs, the interior of the traction transformer oil pump needs to be filled with oil. The oil supplementing method used commonly originally is to open the air release plug at the top of the oil pump of the traction transformer, then open the butterfly valve at the oil inlet of the oil pump of the traction transformer to form a small angle, so that the oil slowly flows into the oil pump of the traction transformer, and the air release plug at the top of the oil pump of the traction transformer is screwed until pure oil flows out of the air release plug. The method has the following disadvantages for the traction transformer of the motor train with special requirements:
when a butterfly valve at an oil inlet of a traction transformer oil pump is opened to form a small angle, the risk that external gas enters the transformer oil tank through the butterfly valve at the small-angle opening position exists because the internal pressure of the oil tank is lower than the external atmospheric pressure; after external gas enters the oil tank, the safe operation of the motor car traction transformer can be influenced.
The motor train traction transformer works in a special environment of a locomotive of a high-speed motor train unit, the normal working voltage is 20-29kV, the voltage allowable deviation is large, the current highest running speed reaches 350km/h, the motor train traction transformer is often subjected to mechanical impact and under the conditions of rapid acceleration and deceleration, and meanwhile, the external environmental factors (such as climate, terrain, natural environment and the like) change greatly, so that the requirement on the motor train traction transformer is higher.
The oil circuit inlet of the traction transformer oil pump is connected with the traction transformer oil tank through an oil pipe, the oil circuit outlet of the traction transformer oil pump is connected with the cooler through an oil pipe, and the cooler is connected with the traction transformer oil tank through an oil pipe, so that a closed oil circuit is formed. The oil pump of the traction transformer pumps the oil with high temperature in the oil tank of the traction transformer into the oil pump of the traction transformer, then the oil with high temperature in the oil pump of the traction transformer is pumped into a cooler for cooling treatment, and the oil after cooling treatment is input into the oil tank of the traction transformer.
When the oil pump of the traction transformer of the motor car breaks down, the requirement for replacement is higher, and in the replacement process of the oil pump of the traction transformer, the risk that gas enters the transformer is not allowed to exist.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to avoid the air to enter into the inside potential safety hazard that causes of transformer tank at the oil pump of traction transformer mends oily in-process.
In order to solve the problems, the technical scheme provided by the invention is as follows: an oil way inlet of a traction transformer oil pump is connected with a traction transformer oil tank through an oil pipe, an oil way outlet of the traction transformer oil pump is connected with a cooler through an oil pipe, an exhaust plug at the top of the traction transformer oil pump is opened under the condition that butterfly valves at an inlet end and an outlet end of the oil way are closed, oil is injected into the traction transformer oil pump from an exhaust port at the exhaust plug through an oil injection device, oil is supplemented to the traction transformer oil pump, and the exhaust plug is closed after the oil supplementation is finished. Then, butterfly valves at the inlet end and the outlet end of the oil way are opened to finish oil supplement work of the oil pump.
Preferably, the step of injecting the oil into the traction transformer oil pump from the exhaust port at the exhaust plug by the oil injection device is as follows: and connecting the oil injection device with one end of a section of thin-walled tube, inserting the other end of the thin-walled tube into the traction transformer oil pump from the exhaust port, and injecting oil into the traction transformer oil pump through the oil injection device and the thin-walled tube.
Preferably, the thin-walled tube with the outer diameter smaller than the diameter of the exhaust port is selected, so that a gap is reserved between the thin-walled tube and the exhaust port when the thin-walled tube is inserted into the traction transformer oil pump from the exhaust port.
Preferably, the oil in the oil injection device is injected into the traction transformer oil pump through the thin-walled pipe, and the oil injection is not suspended until the oil flows out from a gap between the thin-walled pipe and the exhaust port.
Preferably, after oil injection is suspended, the thin-walled pipe is taken out, the traction transformer oil pump is placed statically for 5-10 minutes, after the oil level in the traction transformer oil pump is lowered, the thin-walled pipe is inserted into the traction transformer oil pump again for supplementary oil injection, oil injection is stopped until oil flows out from the gap again, and the vent plug is screwed to finish oil injection.
Preferably, after the oil injection is completed, butterfly valves at the inlet end and the outlet end of the oil way are opened, and the traction transformer oil pump is communicated with the traction transformer oil tank.
Preferably, after the oil injection is finished and the traction transformer oil pump is communicated with the traction transformer oil tank, nitrogen is filled into the traction transformer, the pressure is maintained for 5-10 minutes, and whether oil seeps out of the connection part of the traction transformer oil pump and/or the traction transformer oil pump connecting pipeline is checked.
The beneficial technical effects of the invention are as follows: under the condition that butterfly valves on two sides of a traction transformer oil pump are completely closed, oil is slowly supplemented to the traction transformer oil pump through a thin-walled pipe from a top vent plug of the traction transformer oil pump, after the interior of the traction transformer oil pump is completely supplemented with oil, the top vent plug is closed, the butterfly valves on two ends of the traction transformer oil pump are slowly opened, and the technical scheme can avoid the risk that outside air enters the interior of a traction transformer.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment;
in the figure: the device comprises a butterfly valve 1, a traction transformer oil pump 2, a thin-wall pipe 3, an exhaust port 4, an oil path inlet 5 and an oil path outlet 6.
Detailed Description
The invention is further described with reference to the following examples and figures:
example one
As shown in fig. 1, after the qualified traction transformer oil pump 2 is replaced, before the traction transformer oil pump 2 is operated, the interior of the traction transformer oil pump 2 needs to be filled with oil. The step of oiling the replaced traction transformer oil pump 2 is as follows:
1. under the condition that the butterfly valves 1 at the end 5 and the end 6 of the oil path inlet and the end 6 of the oil path outlet of the traction transformer oil pump 2 are closed, after the traction transformer oil pump 2 is replaced and installed in place, the exhaust plug at the top of the traction transformer oil pump 2 is opened, and the exhaust port 4 is exposed.
2. And connecting the oil injection device with the thin-walled tube 3, inserting the other end of the thin-walled tube 3 into the traction transformer oil pump 2 from the exhaust port 4, and injecting oil into the traction transformer oil pump 2 through the oil injection device and the thin-walled tube 3. Wherein, oiling device can be miniature oil pump or oil storage frock commonly used. In addition, the outer diameter of the thin-wall pipe 3 is smaller than the diameter of the exhaust port 4, so that when the thin-wall pipe 3 is inserted into the traction transformer oil pump 2 from the exhaust port 4, a gap is reserved between the thin-wall pipe 3 and the exhaust port 4.
3. Qualified oil is injected into the traction transformer oil pump 2 from the oil injection device through the thin-wall pipe 3, oil is slowly supplemented to the traction transformer oil pump 2, the qualified oil is injected into the bottom of the interior of the traction transformer oil pump 2 through the thin-wall pipe 3, the supplemented oil slowly rises from the bottom of the traction transformer oil pump 2, and along with the gradual increase of the height of the oil level in the traction transformer oil pump 2 from bottom to top, gas in the traction transformer oil pump 2 can be slowly discharged through a gap between the exterior of the thin-wall pipe 3 and the exhaust port 4. The oil injection is not suspended until the oil flows out from the gap between the thin-walled tube 3 and the vent 4.
4. After oil injection is suspended, the thin-walled tube 3 is slowly taken out, the traction transformer oil pump 2 is placed statically for 5-10 minutes, after the oil level in the traction transformer oil pump 2 drops, the thin-walled tube 3 is inserted into the traction transformer oil pump 2 again for supplementary oil injection, the oil injection is stopped until oil flows out again from the gap, and the air vent plug is screwed to finish the oil injection.
5. After the oil injection is finished, the butterfly valves 1 at the ends of the oil path inlet 5 and the oil path outlet 6 are opened, and the traction transformer oil pump 2 is communicated with the traction transformer oil tank.
6. And after the oil injection is finished and the traction transformer oil pump 2 is communicated with the traction transformer oil tank, nitrogen is filled into the traction transformer oil storage cabinet for pressure maintaining for 5-10 minutes, and whether oil seeps out from the connection part of the traction transformer oil pump 2 and/or the traction transformer oil pump 2 is checked. If the joint of the traction transformer oil pump 2 and the pipeline connected with the traction transformer oil pump 2 has no leakage phenomenon, the success of replacing and supplementing the traction transformer oil pump 2 is indicated.
According to the prior art, oil is supplemented from the oil way inlet 5, and due to the fact that the butterfly valve 1 at the oil way inlet 5 is to be opened, air can enter an oil tank of the traction transformer from the oil way inlet 5 through the oil pipe, and potential safety hazards exist. In the embodiment, oil is filled from the exhaust port 4 of the exhaust plug to the replaced traction transformer oil pump 2 for oil supplement, air in the traction transformer oil pump 2 is slowly and slowly discharged from a gap between the outer part of the thin-wall pipe 3 and the exhaust port 4, the butterfly valves 1 at the inlet and the outlet are always closed in the whole oil filling process, and the air cannot enter the traction transformer oil tank from the butterfly valve 1 through the oil pipe. Therefore, the embodiment can avoid air entering the oil tank of the traction transformer, thereby eliminating the potential safety hazard of gas entering the interior of the traction transformer.
It will be apparent that modifications and variations are possible without departing from the principles of the invention as set forth herein.
Claims (7)
1. A method for supplementing oil to an oil pump of a traction transformer of a bullet train is characterized in that under the condition that butterfly valves at the inlet end and the outlet end of the oil path are closed, an exhaust plug at the top of the oil pump of the traction transformer is opened, oil is injected into the oil pump of the traction transformer from an exhaust port at the exhaust plug by an oil injection device, the oil is supplemented to the oil pump of the traction transformer, and the exhaust plug is closed after the oil supplementation is finished; then, butterfly valves at the inlet end and the outlet end of the oil way are opened to finish the oil supplementing work of the oil pump.
2. The oil supplementing method of an oil pump of a motor car traction transformer according to claim 1, wherein the step of injecting oil into the oil pump of the traction transformer from an exhaust port at an exhaust plug by using an oil injection device comprises the following steps: and connecting the oil injection device with one end of a section of thin-walled tube, inserting the other end of the thin-walled tube into the traction transformer oil pump from the exhaust port, and injecting oil into the traction transformer oil pump through the oil injection device and the thin-walled tube.
3. The method of claim 2, wherein the thin-walled tube having an outer diameter smaller than the diameter of the exhaust port is selected such that a gap is left between the thin-walled tube and the exhaust port when the thin-walled tube is inserted into the traction transformer oil pump from the exhaust port.
4. The method as claimed in claim 3, wherein the oil in the oil injection device is injected into the traction transformer oil pump through a thin-walled tube, and the oil injection is suspended until the oil flows out from the gap between the thin-walled tube and the exhaust port.
5. The method for replenishing oil to an oil pump of a motor train traction transformer according to claim 4, wherein after the oil injection is suspended, the thin-walled tube is taken out, the oil pump of the traction transformer is allowed to stand still for 5-10 minutes, after the oil level in the oil pump of the traction transformer is lowered, the thin-walled tube is inserted into the oil pump of the traction transformer again for replenishing oil injection, the oil injection is stopped until oil flows out again from the gap, and the air vent is screwed tightly to complete the oil injection.
6. The method of claim 5, wherein after the step of filling the oil is completed, butterfly valves at the inlet end and the outlet end of the oil path are opened to allow the traction transformer oil pump to communicate with the traction transformer.
7. The method of claim 6, wherein after the oil is injected and the traction transformer oil pump is connected to the traction transformer, nitrogen is introduced into the traction transformer to maintain pressure for 5-10 minutes, and whether oil seeps out of the traction transformer oil pump and/or the connection of the traction transformer oil pump connection pipeline is checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911153962.XA CN110942898B (en) | 2019-11-22 | 2019-11-22 | Oil pump oil supplementing method for bullet train traction transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911153962.XA CN110942898B (en) | 2019-11-22 | 2019-11-22 | Oil pump oil supplementing method for bullet train traction transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110942898A CN110942898A (en) | 2020-03-31 |
| CN110942898B true CN110942898B (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911153962.XA Active CN110942898B (en) | 2019-11-22 | 2019-11-22 | Oil pump oil supplementing method for bullet train traction transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11247644A (en) * | 1998-02-27 | 1999-09-14 | Isuzu Motors Ltd | Head structure of engine |
| CN105041718A (en) * | 2014-09-15 | 2015-11-11 | 邢宇 | Submersible pump with pressure holding device capable of adjusting oil storage chamber volume of the submersible pump |
| CN105804976A (en) * | 2016-04-27 | 2016-07-27 | 江苏源之翼电气有限公司 | Overlap type large-displacement diaphragm compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY191310A (en) * | 2015-12-25 | 2022-06-15 | Novomet Perm Joint Stock Company | Small immersion pump assembly |
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2019
- 2019-11-22 CN CN201911153962.XA patent/CN110942898B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11247644A (en) * | 1998-02-27 | 1999-09-14 | Isuzu Motors Ltd | Head structure of engine |
| CN105041718A (en) * | 2014-09-15 | 2015-11-11 | 邢宇 | Submersible pump with pressure holding device capable of adjusting oil storage chamber volume of the submersible pump |
| CN105804976A (en) * | 2016-04-27 | 2016-07-27 | 江苏源之翼电气有限公司 | Overlap type large-displacement diaphragm compressor |
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| Publication number | Publication date |
|---|---|
| CN110942898A (en) | 2020-03-31 |
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