CN202266819U - Circuit for automatic switching spare pump for mill lubricating oil station - Google Patents
Circuit for automatic switching spare pump for mill lubricating oil station Download PDFInfo
- Publication number
- CN202266819U CN202266819U CN2011204039977U CN201120403997U CN202266819U CN 202266819 U CN202266819 U CN 202266819U CN 2011204039977 U CN2011204039977 U CN 2011204039977U CN 201120403997 U CN201120403997 U CN 201120403997U CN 202266819 U CN202266819 U CN 202266819U
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- contactor
- pump motor
- oil
- normally opened
- opened contact
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Abstract
The utility model discloses a circuit for an automatic switching spare pump for a mill lubricating oil station. The circuit comprises a control loop and a main loop which is connected with a main oil pump motor M1 and a spare oil pump motor M2 in parallel, wherein the control loop comprises three branches which are connected in parallel; and a relay and a thermal overload relay are added. The circuit has the advantages that the circuit connection is simple, and the spare pump motor can timely and automatically supply oil under the normal state and avoids the fluctuation of oil pressure in an oil pipe, so that bearings on the charging and discharging ends of the mill are lubricated sufficiently to prolong the service life of the bearings. Once the main pump motor is under the thermal protection, the circuit can achieve automatically switching the oil supply of the spare pump motor.
Description
Technical field
The utility model relates to a kind of circuit that stand by pump is changed at grinding machine lubricant oil station automatically that is used for.
Background technique
Grinding machine need ceaselessly the bearing of its feeding and discharging end is lubricated, otherwise the bearing of feeding and discharging end will be because of oil starvation in the running, and it is bad to cause bearing shell to grind.There are two oil pumps in lubrication station, and oil pressure just often only needs the operation main pump, because overload when causing shutting down, the interior oil pressure of oil outlet tube will reduce when main pump motor, when the oil pressure in the oil outlet tube during less than normal value, will start stand by pump.After stand by pump running a period of time, the oil pressure in the oil outlet tube will rise, and when the oil pressure in the oil outlet tube during greater than normal value, will stop stand by pump.After stand by pump shut down, the oil pressure in the oil outlet tube will reduce once more, when the oil pressure in the oil outlet tube during less than normal value, will start stand by pump once more.Frequent so times without number start-stop stand by pump; Shortened the working life of stand by pump on the one hand; Oil pressure in the oil outlet tube is fluctuated on the other hand, will cause the bearing lubrication of grinding machine feeding and discharging end insufficient if the stand by pump switching is untimely, shortens the working life of bearing.
Summary of the invention
Be technical deficiency more than solving, the utility model provide a kind of simple in structure, stable performance, reliability high be used for the circuit that stand by pump is changed at grinding machine lubricant oil station automatically.
The utility model is realized through following measure:
The utility model a kind of is used for the circuit that stand by pump is changed at grinding machine lubricant oil station automatically, comprises control loop
And the major loop that is in parallel of main oil pump motor M1 and emergency bearing oil pump motor M 2, said control loop comprises following branch road:
Branch road one, main pump stop button SB1 normally-closed contact, main pump start button SB2 normally opened contact, thermal overload
Relay FR1 normally-closed contact and the series connection of contactor KM1 coil, contactor KM1 normally opened contact is parallelly connected with main pump start button SB2 normally opened contact, main pump motor run indicator HL1 and contactor KM1 coils from parallel connection of coils;
Branch road two, relay K A1 normally-closed contact, contactor KM1 normally opened contact, thermal overload relay FR2 are normal
Closed contact and the series connection of contactor KM2 coil, thermal overload relay FR1 normally opened contact is parallelly connected with relay K A1 normally-closed contact and contactor KM1 normally opened contact, stand by pump motor run indicator HL2 and contactor KM2 coils from parallel connection of coils;
Branch road three, pressure switch SP1 and the series connection of relay K A1 coil;
Branch road one, branch road two and branch road three parallel connections; Thermal overload relay FR1 and contactor KM1 normally opened contact with
Main oil pump motor M1 series connection in the major loop, thermal overload relay FR2 and contactor KM2 normally opened contact are connected with the emergency bearing oil pump motor M 2 in the major loop.
The beneficial effect of the utility model is:
Circuit connects simple, and under normal state, the stand by pump motor is auto-supply in time, has avoided the oil pressure in the oil pipe fluctuated, makes the bearing lubrication of grinding machine feeding and discharging end abundant, prolongs the working life of bearing.In case under the situation of main pump motor overtemperature protection, also can realize the stand by pump motor fuel feeding that automaticallyes switch.
Description of drawings
Fig. 1 is that the main loop circuit of the utility model connects schematic representation.
Fig. 2 is that the control loop circuit of the utility model connects schematic representation.
Embodiment
Like Fig. 1, shown in 2, the utility model a kind of is used for grinding machine lubricant oil station and changes stand by pump automatically
The road comprises control loop and major loop.
Control loop comprises following branch road:
Branch road one, main pump stop button SB1 normally-closed contact, main pump start button SB2 normally opened contact, thermal overload
Relay FR1 normally-closed contact and the series connection of contactor KM1 coil, contactor KM1 normally opened contact is parallelly connected with main pump start button SB2 normally opened contact, main pump motor run indicator HL1 and contactor KM1 coils from parallel connection of coils;
Branch road two, relay K A1 normally-closed contact, contactor KM1 normally opened contact, thermal overload relay FR2 are normal
Closed contact and the series connection of contactor KM2 coil, thermal overload relay FR1 normally opened contact is parallelly connected with relay K A1 normally-closed contact and contactor KM1 normally opened contact, stand by pump motor run indicator HL2 and contactor KM2 coils from parallel connection of coils;
Branch road three, pressure switch SP1 and the series connection of relay K A1 coil;
Branch road one, branch road two and branch road three parallel connections.
Major loop:
Main oil pump motor M1 and emergency bearing oil pump motor M 2 are in parallel, main breaker QF control circuit breaker Q F1, QF2.The outlet terminal of QF1 is received the end of incoming cables of the normally opened contact of contactor KM1, and the outlet terminal of the normally opened contact of contactor KM1 is received the end of incoming cables of thermal overload relay FR1, and the outlet terminal of thermal overload relay FR1 is received the supply terminals of main pump motor.The outlet terminal of QF2 is received the end of incoming cables of the normally opened contact of contactor KM2, and the outlet terminal of the normally opened contact of contactor KM2 is received the end of incoming cables of thermal overload relay FR2, and the outlet terminal of thermal overload relay FR2 is received the supply terminals of stand by pump motor.
Working procedure:
Each breaker closing is pressed main pump start button SB2, and contactor KM1 coil gets electric, itself and to receive the contactor KM1 normally opened contact of main pump start button SB2 closed, its contactor KM1 normally opened contact of receiving major loop is closed, starts main pump motor.Simultaneously, main pump motor run indicator HL1 is bright.
Because during the main pump motor entry into service, the lubricant oil oil pressure in the oil outlet tube can not reach normal value at once, therefore detects the normal pressure switch SP1 of oil pressure and breaks off; Relay K A1 coil must not be electric, and its relay K A1 normally-closed contact that is concatenated in the stand by pump control loop is closed, and get because of contactor KM1 coil this moment; Its normal closure of making war; Thereby contactor KM2 coil gets electricly, and the contactor KM2 normally opened contact of major loop is closed, starts the stand by pump motor.Simultaneously, stand by pump motor run indicator HL2 is bright.
After a period of time; Lubricant oil oil pressure in the oil outlet tube reaches normal value, and pressure switch SP1 is closed, and relay K A1 coil gets; Its relay K A1 normally-closed contact that is concatenated in the stand by pump control loop breaks off; Contactor KM2 coil blackout, the contactor KM2 normally opened contact of major loop breaks off, and the stand by pump motor shuts down.Simultaneously, stand by pump motor run indicator HL2 goes out.
When main pump motor causes shutting down owing to overload, thermal overload relay FR1 action, thermal overload relay FR1 normally-closed contact breaks off, normally opened contact is closed, causes contactor KM1 coil blackout, and main pump motor shuts down; Contactor KM2 coil gets electric, starts the stand by pump motor.Even if the lubricant oil oil pressure in the oil outlet tube reaches normal value, pressure switch SP1 is closed, and relay K A1 coil gets electric, also can not cause contactor KM2 coil blackout.
The foregoing description is said to be in order to specify this patent; Though describe through specific term in the literary composition; But can not limit the protection domain of this patent with this; The personage who is familiar with this technical field can change or revise it after the spirit of understanding this patent and principle and reach equivalent purpose, and this equivalence change and modification all should be covered by the claim scope and define in the category.
Claims (1)
1. one kind is used for the circuit that stand by pump is changed at grinding machine lubricant oil station automatically, comprises the major loop that control loop and main oil pump motor M1 and emergency bearing oil pump motor M 2 are in parallel, and it is characterized in that said control loop comprises following branch road:
Branch road one; Main pump stop button SB1 normally-closed contact, main pump start button SB2 normally opened contact, thermal overload relay FR1 normally-closed contact and the series connection of contactor KM1 coil; Contactor KM1 normally opened contact is parallelly connected with main pump start button SB2 normally opened contact, main pump motor run indicator HL1 and contactor KM1 coils from parallel connection of coils;
Branch road two; Relay K A1 normally-closed contact, contactor KM1 normally opened contact, thermal overload relay FR2 normally-closed contact and the series connection of contactor KM2 coil; Thermal overload relay FR1 normally opened contact is parallelly connected with relay K A1 normally-closed contact and contactor KM1 normally opened contact, stand by pump motor run indicator HL2 and contactor KM2 coils from parallel connection of coils;
Branch road three, pressure switch SP1 and the series connection of relay K A1 coil;
Branch road one, branch road two and branch road three parallel connections; Thermal overload relay FR1 and contactor KM1 normally opened contact are connected with main oil pump motor M1 in the major loop, and thermal overload relay FR2 and contactor KM2 normally opened contact are connected with the emergency bearing oil pump motor M 2 in the major loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204039977U CN202266819U (en) | 2011-10-21 | 2011-10-21 | Circuit for automatic switching spare pump for mill lubricating oil station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204039977U CN202266819U (en) | 2011-10-21 | 2011-10-21 | Circuit for automatic switching spare pump for mill lubricating oil station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202266819U true CN202266819U (en) | 2012-06-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204039977U Expired - Fee Related CN202266819U (en) | 2011-10-21 | 2011-10-21 | Circuit for automatic switching spare pump for mill lubricating oil station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202266819U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672345A (en) * | 2013-12-24 | 2014-03-26 | 七台河宝泰隆甲醇有限公司 | Electrical interlock start device of control loops of oxygen compressor oil pumps |
| CN104405627A (en) * | 2014-10-29 | 2015-03-11 | 安徽鑫龙电器股份有限公司 | Electric generator cooling water pump control cabinet |
| CN105443962A (en) * | 2015-11-11 | 2016-03-30 | 杭州七所科技有限公司 | Double-pump lubricating device for papermaking machine |
| CN107461323A (en) * | 2017-09-05 | 2017-12-12 | 安徽晋煤中能化工股份有限公司 | Gas making hydraulic oil pumping plant electric-control system |
| CN108757419A (en) * | 2018-05-31 | 2018-11-06 | 河南森源电气股份有限公司 | A kind of water pump control circuit and water pump |
| CN109237287A (en) * | 2018-11-09 | 2019-01-18 | 四川川润液压润滑设备有限公司 | A kind of method that lubricating oil system failure of pump determines and standby usage pump automatically switches |
-
2011
- 2011-10-21 CN CN2011204039977U patent/CN202266819U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672345A (en) * | 2013-12-24 | 2014-03-26 | 七台河宝泰隆甲醇有限公司 | Electrical interlock start device of control loops of oxygen compressor oil pumps |
| CN103672345B (en) * | 2013-12-24 | 2016-03-30 | 七台河宝泰隆甲醇有限公司 | The electric interlock starting drive in oxygen compressor oil pump control loop |
| CN104405627A (en) * | 2014-10-29 | 2015-03-11 | 安徽鑫龙电器股份有限公司 | Electric generator cooling water pump control cabinet |
| CN104405627B (en) * | 2014-10-29 | 2017-04-19 | 安徽中电兴发与鑫龙科技股份有限公司 | Electric generator cooling water pump control cabinet |
| CN105443962A (en) * | 2015-11-11 | 2016-03-30 | 杭州七所科技有限公司 | Double-pump lubricating device for papermaking machine |
| CN107461323A (en) * | 2017-09-05 | 2017-12-12 | 安徽晋煤中能化工股份有限公司 | Gas making hydraulic oil pumping plant electric-control system |
| CN108757419A (en) * | 2018-05-31 | 2018-11-06 | 河南森源电气股份有限公司 | A kind of water pump control circuit and water pump |
| CN109237287A (en) * | 2018-11-09 | 2019-01-18 | 四川川润液压润滑设备有限公司 | A kind of method that lubricating oil system failure of pump determines and standby usage pump automatically switches |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20141021 |
|
| EXPY | Termination of patent right or utility model |