CN204553319U - A kind of blower fan oil pump interlock circuit - Google Patents
A kind of blower fan oil pump interlock circuit Download PDFInfo
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- CN204553319U CN204553319U CN201520208288.1U CN201520208288U CN204553319U CN 204553319 U CN204553319 U CN 204553319U CN 201520208288 U CN201520208288 U CN 201520208288U CN 204553319 U CN204553319 U CN 204553319U
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- oil pump
- electric control
- control circuit
- auxiliary reclay
- contactor
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Abstract
The utility model discloses a kind of blower fan oil pump interlock circuit, be made up of electric control circuit and automatic control loop, electric control circuit access 220V ac power supply, electric control circuit comprises on-the-spot selector switch, stop button switch, start button switch, A.C. contactor, the first auxiliary reclay and the second auxiliary reclay; Automatic control loop comprises PLC, and the data-out port of PLC is connected an auxiliary reclay, and the data-in port of PLC is connected an ac contactor contact, whole automatic control loop access 24V DC electrical source; The utility model is for the safe operation new demand of blower fan in continuous high-speed wind-tunnel; by oneself, electric control circuit Interlocking System; form effective safety measure; solve Security Control Problem when oil pump runs; realize oil pump and blanket gas is interlocked, emergency bearing oil pump automatic switching, source of lubrication overvoltage interlock; guarantee that oil pump feed is continuous, pressure stability, state are controlled, improve fan safe and wind tunnel test efficiency.
Description
Technical field
The utility model relates to wind-tunnel power system safety control field, especially relates to a kind of blower fan oil pump interlock circuit.
Background technique
The safety and stablization of oil pump in large-scale turbomachinery (steam turbine, blower fan) are run, directly affect industrial production full process, particularly as the blower fan of continuous high-speed wind-tunnel power system, continue to run up in wind tunnel test process, be strict with the without interruption of source of lubrication.It is inner that fan rotor and whole bearing housing are installed in wind-tunnel pipe network; under wind-tunnel changeable test stagnation pressure operating mode; the lubricant oil injected after oil pump pressurization very likely leaks to wind-tunnel inner flow passage; therefore usually also gas-flow closure need be set at bearing housing end face, carry out under-voltage to source of lubrication simultaneously and cross pressure-controlled.The application of blower fan in wind-tunnel power system belongs to comparatively frontier, Current Domestic only has two continuous high-speed wind-tunnel, the safe operation experience of blower fan oil supply system comparatively lacks, in the urgent need to carrying out design and development to the safety control strategy of oil pump, especially need badly a kind of simple and practical, control reliable oil pump interlock circuit.
Model utility content
The purpose of this utility model is to provide a kind of blower fan oil pump interlock circuit; for the safe operation new demand of blower fan in continuous high-speed wind-tunnel; by oneself, electric control circuit Interlocking System; form effective safety measure; solve Security Control Problem when oil pump runs; realize oil pump and blanket gas is interlocked, emergency bearing oil pump automatic switching, source of lubrication overvoltage interlock, guarantee oil pump feed continuously, pressure stability, state be controlled, improves fan safe and wind tunnel test efficiency.
The purpose of this utility model is achieved through the following technical solutions:
A kind of blower fan oil pump interlock circuit, be made up of electric control circuit and automatic control loop, described electric control circuit access 220V ac power supply, electric control circuit comprises on-the-spot selector switch, stop button switch, start button switch, A.C. contactor, the first auxiliary reclay and the second auxiliary reclay; Wherein:
One end access power supply of selector switch, the other end is that third gear connects, wherein one grade connects sky, another grade connect successively stop button switch, the contact of the first auxiliary reclay, start button switch, A.C. contactor coil and access power supply, the wherein auxiliary contact of A.C. contactor and start button switch in parallel; The last step of selector switch is connected the contact of the second auxiliary reclay, the contact of the first auxiliary reclay, the coil of A.C. contactor access power supply, the wherein contact shunt of auxiliary contact first auxiliary reclay of A.C. contactor successively;
Described automatic control loop comprises PLC, and the data-out port of PLC is connected an auxiliary reclay, and the data-in port of PLC is connected an ac contactor contact; Described whole automatic control loop access 24V DC electrical source.
In technique scheme, comprise some roads electric control circuit, the circuit structure of each road electric control circuit is identical.
In technique scheme, in each road electric control circuit described, share the first auxiliary reclay.
In technique scheme, described interlock circuit comprises two-way electric control circuit, and two-way electric control circuit shares the first auxiliary reclay.
The blanket gas pressure that lubricating oil pressure associates, on prior art basis, is incorporated control loop, software and hardware all implements interlocking, effectively prevent oil leakage by the utility model; Solve the automatic switching problem of main oil pump, emergency bearing oil pump, emergency bearing oil pump can be started rapidly when source of lubrication hypotony, achieve the continous-stable supply of lubricant oil; Compared with prior art, set up oil sources overvoltage interlock, be connected with hardware circuit by control logic design, the running state of main oil pump, emergency bearing oil pump is interlocked, for source of lubrication Stress control provides redundancy protecting; Formally put into operation in continuous high-speed wind-tunnel, control logic is reliable, and stable working state, effectively improves fan operation Security and wind tunnel test efficiency.
Accompanying drawing explanation
Fig. 1 is electric control circuit circuit diagram of the present utility model;
Fig. 2 is automatic control loop circuit figure of the present utility model;
Fig. 3 is the supplementray circuit diagram in Fig. 2 automatic control loop;
Wherein: SA is selector switch, SB is button, and KA is auxiliary reclay, and KM is A.C. contactor, and Q is the data output end of PLC, and I is the data input pin of PLC.
Embodiment
As shown in Figure 1, electric control circuit comprises on-the-spot selector switch SA, button SB and A.C. contactor KM, and selector switch SA has third gear, is respectively field control, telecontrol and sky and connects, the main contact access oil pump power loop of A.C. contactor KM.In main oil pump electric control circuit, connect with stop button SB1, auxiliary reclay contact KA1, start button SB2 in the field control contact of SA1; Connect with auxiliary reclay contact KA2, KA1 in telecontrol contact, two loops all connect ac contactor coil KM1, and the auxiliary contact of KM1 are in parallel with SB2 and KA1 respectively, loop access 220V ac power supply.The control principle of emergency bearing oil pump electric control circuit, the mode of connection and components and parts form identical with main oil pump.
As shown in Figure 2, automatic control loop comprises PLC system, auxiliary reclay KA1, KA2 and KA3.Q1.0, Q1.1 and Q1.2 are the data-out port of PLC, connect respectively with KA1, KA2 and KA3, and controlling power supply is 24V direct current; As shown in Figure 3.I1.0, I1.1 are the data-in port of PLC, respectively mouth series AC contacts of contactor KM1, KM2.
Concrete scene is applied as:
Oil pump and blanket gas are interlocked: PLC control program arranges blanket gas pressure normality threshold P1, and by being arranged on the pressure transmitter on on-the-spot steam line, Real-time Collection also judges current blanket gas pressure P 2.As P2 >=P1, program DO set, Q1.0 connects, and KA1 coil powers on, and 4 the normally opened contact KA1 be arranged in electric control circuit are closed, and now oil pump just possesses starting condition.When SA1 switches to field control, at the scene SB2 clicked by control cabinet panel, connect control loop, KM1 coil powers on; When SA1 switches to telecontrol, loop is directly communicated with, and KM1 coil powers on.After KM1 coil powers on, its main contact being positioned at main oil pump power loop is connected, and main oil pump starts.The control principle of emergency bearing oil pump is identical with main oil pump, when SA2 switches to field control, at the scene SB4 is clicked by control cabinet panel, and connect control loop, KM2 coil powers on; When SA2 switches to telecontrol, loop is directly communicated with, and KM2 coil powers on.After KM2 coil powers on, its main contact being positioned at emergency bearing oil pump power loop is connected, and emergency bearing oil pump starts.
Interlocked by blanket gas pressure and pump start loop, can effectively prevent from starting oil pump when blanket gas does not drop into, make lubricant oil leak to wind-tunnel runner from Fan Bearing Box end face, cause blower fan lubrication deficiency, wind-tunnel runner pollutes or high speed oil droplet damages blower fan.
Emergency bearing oil pump automatic switching: PLC control program arranges lubricating oil pressure normality threshold P3, by being arranged on the pressure transmitter on on-the-spot oil supply pipeline, Real-time Collection also judges current lubricating oil pressure P4.Auxiliary contact KM1, KM2 of main oil pump and emergency bearing oil pump A.C. contactor are with the form of DI access PLC system, KM1 address is I1.0, KM2 address is I1.1, the output value that P4 and P3 compares by program in real time carries out "AND" logic with I1.0 and I1.1 respectively, the output of the corresponding "AND" logic of I1.0 is the output of the corresponding "AND" logic of Q1.2, I1.1 is Q1.1.
After main oil pump starts, all make contact of KM1, I1.0 set; Oil sources charge oil pressure P4 continues to increase, as P4 >=P3, comparison module set in program, the "AND" logic module set making I1.0 corresponding, Q1.2 connects, KA3 coil powers on, and the normally-closed contact KA3 be arranged in emergency bearing oil pump electric control circuit is separated, and therefore emergency bearing oil pump telecontrol loop disconnects.
The SA2 of emergency bearing oil pump is switched to telecontrol, and because KA3 is in separated position, therefore emergency bearing oil pump can not start immediately, only awaits orders as automatic switching.In main oil pump running, program continuous acquisition source of lubrication pressure P 4, and according to the P3 arranged, whether the current source of lubrication pressure of real-time judge is normal, guarantees that lubricant oil can meet needed for the running of blower fan under the driving of main oil pump.When main oil pump fuel feeding is abnormal, when causing source of lubrication pressure P 4 rapid drawdown to below P3, comparison module in program resets, the "AND" logic module making I1.0 corresponding resets, Q1.2 disconnects, KA3 coil losing electricity, contact KA3 is closed, and emergency bearing oil pump telecontrol loop is connected, and KM2 coil powers on, its main contact being positioned at emergency bearing oil pump power loop is connected, emergency bearing oil pump starts, and supplements oil supply pressure rapidly, provides the lubricant oil of steady and continuous for blower fan continues to run up, effectively prevent hydrodynamic bearing from occurring dry combustion method because of lubrication deficiency, damage bearing structure.
Emergency bearing oil pump run duration, main oil pump is then as subsequent use, and its automatic switching principle is identical with emergency bearing oil pump.
Source of lubrication overvoltage is interlocked: after emergency bearing oil pump puts into operation, and source of lubrication pressure P 4 remains on more than P3 by stable, forms an equilibrium relation simultaneously, guarantee that lubrication oil seal can be locked in bearing housing by gas-flow closure completely, with anti-spilled with blanket gas pressure P 2.Main oil pump fuel feeding abnormal cause is various, may be motor or oil pump mechanical failure, also may be that balancing boom devices function is unstable, or on-the-spot oil supply pipeline is jammed temporarily.Control loop or oil supply pipeline are a kind of provisional exception extremely, may suddenly disappear during emergency bearing oil pump normal fuel injection, therefore main oil pump recovers normal fuel injection again, the source of lubrication pressure that will cause like this is excessive, break separate unit oil pump run time and blanket gas press equilibrium of forces, cause oil leakage.
Source of lubrication overvoltage interlock can effectively solve the problem.After emergency bearing oil pump puts into operation, all make contact of KM2, I1.1 set; Oil sources charge oil pressure P4 continues to increase, as P4 >=P3, comparison module set in program, the "AND" logic module set making I1.1 corresponding, Q1.1 connects, and KA2 coil powers on, the normally-closed contact KA2 be arranged in main oil pump electric control circuit is separated, cut off main oil pump telecontrol loop, effectively stop main oil pump again to start in emergency bearing oil pump operation, the normal situation of source of lubrication pressure, keep source of lubrication pressure stability.
Emergency bearing oil pump run duration, main oil pump is then as subsequent use, and its source of lubrication overvoltage locking principle is identical with emergency bearing oil pump.
All features disclosed in this specification, except mutually exclusive feature, all can combine by any way.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a blower fan oil pump interlock circuit, it is characterized in that being made up of electric control circuit and automatic control loop, described electric control circuit access 220V ac power supply, electric control circuit comprises on-the-spot selector switch, stop button switch, start button switch, A.C. contactor, the first auxiliary reclay and the second auxiliary reclay; Wherein:
One end access power supply of selector switch, the other end is that third gear connects, wherein one grade connects sky, another grade connect successively stop button switch, the contact of the first auxiliary reclay, start button switch, A.C. contactor coil and access power supply, the wherein auxiliary contact of A.C. contactor and start button switch in parallel; The last step of selector switch is connected the contact of the second auxiliary reclay, the contact of the first auxiliary reclay, the coil of A.C. contactor access power supply, the wherein auxiliary contact of A.C. contactor and the contact shunt of the first auxiliary reclay successively;
Described automatic control loop comprises PLC, and the data-out port of PLC is connected an auxiliary reclay, and the data-in port of PLC is connected an ac contactor contact; Described whole automatic control loop access 24V DC electrical source.
2. a kind of blower fan oil pump interlock circuit according to claim 1, it is characterized in that comprising some roads electric control circuit, the circuit structure of each road electric control circuit is identical.
3. a kind of blower fan oil pump interlock circuit according to claim 2, is characterized in that sharing the first auxiliary reclay in each road electric control circuit described.
4. a kind of blower fan oil pump interlock circuit according to Claims 2 or 3, is characterized in that described interlock circuit comprises two-way electric control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208288.1U CN204553319U (en) | 2015-04-09 | 2015-04-09 | A kind of blower fan oil pump interlock circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208288.1U CN204553319U (en) | 2015-04-09 | 2015-04-09 | A kind of blower fan oil pump interlock circuit |
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| CN204553319U true CN204553319U (en) | 2015-08-12 |
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| CN201520208288.1U Active CN204553319U (en) | 2015-04-09 | 2015-04-09 | A kind of blower fan oil pump interlock circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593838A (en) * | 2015-10-16 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Oil pump control circuit |
| US10072644B2 (en) | 2016-08-10 | 2018-09-11 | Kickstart International, Inc. | Portable alternative-energy powered pump assembly |
| CN108574426A (en) * | 2018-06-04 | 2018-09-25 | 河南森源电气股份有限公司 | A kind of electric motor starting control system |
-
2015
- 2015-04-09 CN CN201520208288.1U patent/CN204553319U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593838A (en) * | 2015-10-16 | 2017-04-26 | 安徽华尔泰化工股份有限公司 | Oil pump control circuit |
| US10072644B2 (en) | 2016-08-10 | 2018-09-11 | Kickstart International, Inc. | Portable alternative-energy powered pump assembly |
| US10968902B2 (en) | 2016-08-10 | 2021-04-06 | Kickstart International, Inc. | Portable alternative-energy powered pump assembly |
| CN108574426A (en) * | 2018-06-04 | 2018-09-25 | 河南森源电气股份有限公司 | A kind of electric motor starting control system |
| CN108574426B (en) * | 2018-06-04 | 2024-02-20 | 河南森源电气股份有限公司 | Motor starting control system |
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