Lubricating oil pump electric control system of nozzle stress application regulator test bed

Abstract

The utility model provides a lubricating oil pump electric control system of a nozzle force application regulator test bed, which comprises contactors KM19-KM26, one ends of the contactors KM19-KM26 are connected in parallel with the positive pole of the secondary side of a transformer TR3, the other ends of the contactors KM19, KM21, KM23, KM25 and KM26 are respectively connected with normally open contacts of intermediate relays KA12, KA14-KA17, the other ends of the normally open contacts of the intermediate relays KA14-KA17 are respectively connected with protectors FR12, FR15, FR17 and FR19, and the contactors KM19, KM21, KM23, KM25 and KM26 are respectively connected with the positive pole of the secondary side of the transformer TR3. The other ends of the contactors KM20, KM22 and KM24 are all connected with three normally-open synchronous contacts of an intermediate relay KA13, the other ends of the three normally-open synchronous contacts of the intermediate relay KA13 are connected in parallel to a protector FR16, and the other end of the protector FR16 is sequentially connected with a protector FR14 and a protector FR11. The contactor coil of each motor is connected in series with the normally open contact of the intermediate relay and the protector, the intermediate relay controls the start and stop of the motor, the protector can directly cut off the coil circuit of the contactor while protecting the motor, and the double-circuit protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to an electric control system for a lubricating oil pump of a nozzle booster regulator test bench. Background Art

[0002] During the experiment, the nozzle booster regulator needs a fuel pump to provide fuel to the nozzle, a lubricating oil pump to provide lubricating oil to the fuel pump, and a heating device and a cooling device for heating and cooling the fuel. The fuel pump and the lubricating oil pump are also equipped with a backup pump. Both the fuel pump and the lubricating oil pump need to be driven by a motor, and the motor and the control device for fuel cooling and heating all use contactors; therefore, a complete control system is needed to reasonably control the fuel supply system during the experiment of the nozzle booster regulator. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a lubricating oil pump electronic control system of a nozzle booster regulator test bench.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides a lubricating oil pump electronic control system of a nozzle booster regulator test bench, including contactors KM19-KM26, one end of each of the contactors KM19-KM26 is connected in parallel to the positive pole of the secondary side of the transformer TR3, the other ends of the contactors KM19, KM21, KM23, KM25, and KM26 are respectively connected to the normally open contacts of the intermediate relays KA12, KA14-KA17, and the other ends of the normally open contacts of the intermediate relays KA14-KA17 are respectively connected to the protectors FR12, FR15, and FR17. 7. FR19 is connected, the other ends of contactors KM20, KM22, and KM24 are all connected to the three normally open synchronous contacts of intermediate relay KA13, the other ends of the three normally open synchronous contacts of intermediate relay KA13 are connected in parallel to protector FR16, the other end of protector FR16 is connected to protectors FR14 and FR11 in sequence, the other ends of the normally open contacts of protectors FR11, FR12, FR15, FR17, FR19 and intermediate relay KA12 are connected to the negative electrode of the secondary side of transformer TR3;

[0006] The intermediate relays KA12 to KA17 are connected to the output end of the output module of the PLC;

[0007] The normally open main contacts of the relays KM19 to KM26 are respectively arranged on the power supply lines of the electromagnetic heater EHoT2, the motor M6, the motor M7, the motor M8, the motor M9, the motor M10, the motor M11, and the refrigeration device COOLerD.

[0008] One end of the normally open auxiliary contact of the contactors KM19 to KM26 is respectively connected to the input end of the PLC input module, and the other end is connected in parallel to the PLC+24V power supply.

[0009] One end of the auxiliary contacts of the intermediate relays KA12 to KA17 is connected in parallel to the PLC+24V power supply, and the other end is connected to an indicator light, and the other end of the indicator light is connected in parallel to the PLC-24V power supply.

[0010] An indicator light HR5 is also connected between the two ends of the secondary side of the transformer TR3, and a fuse FU14 is also provided at the positive pole of the secondary side of the transformer TR3.

[0011] The primary side of the transformer TR is connected to any two phases of a 380V three-phase line.

[0012] The motors M6 and M7, the motors M8 and M9, and the motors M10 and M11 are standby motors for each other and are respectively connected in parallel to the 380V power supply bus.

[0013] The beneficial effect of the utility model is that by connecting the normally open contact of the intermediate relay and the protector in series on the contactor coil of each motor, the intermediate relay controls the start and stop of the motor, and the protector can directly cut off the coil circuit of the contactor while protecting the motor, thereby having a dual-circuit protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the contactor control circuit principle of the utility model;

[0015] Figure 2 This is a schematic diagram of the principle of the intermediate relay control circuit of the utility model;

[0016] Figure 3 This is a schematic diagram of the principle of the motor power supply circuit of the utility model. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0018] like Figure 1The lubricating oil pump electronic control system of the nozzle booster regulator test bench shown in the figure includes contactors KM19~KM26, one end of the contactors KM19~KM26 are connected in parallel to the positive pole of the secondary side of the transformer TR3, the other ends of the contactors KM19, KM21, KM23, KM25, and KM26 are respectively connected to the normally open contacts of the intermediate relays KA12, KA14~KA17, the other ends of the normally open contacts of the intermediate relays KA14~KA17 are respectively connected to the protectors FR12, FR15, FR17, and FR19, and the other ends of the contactors KM20, KM22, and KM24 are all connected to the intermediate relay KA1 3, the other end of the three normally open synchronous contacts of the intermediate relay KA13 is connected in parallel to the protector FR16, the other end of the protector FR16 is connected to the protectors FR14 and FR11 in sequence, and the other end of the normally open contacts of the protectors FR11, FR12, FR15, FR17, FR19 and the intermediate relay KA12 is connected to the negative pole of the secondary side of the transformer TR3; the main motors M6, M8, and M10 are synchronously controlled by the intermediate relay KA13. When lubrication is required, the gearbox, fuel pump, and multi-function pump are started synchronously, and the lubricating oil is supplied to the gearbox and fuel pump in time to achieve simultaneous lubrication. The standby pump motors M7, M9, and M11 are respectively started by an intermediate relay, and can be individually controlled to switch the faulty pump.

[0019] The intermediate relays KA12 to KA17 are connected to the output end of the output module of the PLC, and each intermediate relay is connected to a port of the PLC, and the PLC outputs a separate instruction to control its on and off;

[0020] The normally open main contacts of the relays KM19 to KM26 are respectively arranged on the power supply lines of the electromagnetic heater EHoT2, the motor M6, the motor M7, the motor M8, the motor M9, the motor M10, the motor M11, and the refrigeration device COOLerD.

[0021] One end of the normally open auxiliary contacts of KM19~KM26 are respectively connected to the input end of the PLC input module, and the other end is connected in parallel to the PLC+24V power supply. The on and off status of each pump is timely fed back through the auxiliary contacts of the contactor. The alarm program can be preset in the PLC. When the output instruction turns on the designated contactor without a feedback signal, an alarm is issued and the standby pump motor is turned on to avoid wear of the test bench due to lack of lubrication, and to remind the staff to carry out maintenance.

[0022] One end of the auxiliary contacts of the intermediate relays KA12~KA17 is connected in parallel to the PLC+24V power supply, and the other end is connected to an indicator light. The other end of the indicator light is connected in parallel to the PLC-24V power supply, so that the on and off status of each motor can be displayed, which is convenient for the staff to judge the working status.

[0023] An indicator light HR5 is also connected between the two ends of the secondary side of the transformer TR3, and a fuse FU14 is also provided at the positive pole of the secondary side of the transformer TR3.

[0024] Transformer TR3 is a unidirectional 380V to 220V transformer. The primary side of transformer TR3 is connected to any two phases of a 380V three-phase circuit, and the secondary side outputs a 220V power supply.

Claims

1. A lubricating oil pump electronic control system for a nozzle booster regulator test bench, characterized in that: It includes contactors KM19~KM26, one end of which is connected in parallel to the positive pole of the secondary side of transformer TR3, and the other ends of contactors KM19, KM21, KM23, KM25, and KM26 are connected to the normally open contacts of intermediate relays KA12, KA14~KA17 respectively. The other ends of the normally open contacts of intermediate relays KA14~KA17 are connected to protectors FR12, FR15, FR17, and FR19 respectively. Contactor KM2 The other ends of KM0, KM22 and KM24 are all connected to the three normally open synchronous contacts of the intermediate relay KA13, the other ends of the three normally open synchronous contacts of the intermediate relay KA13 are connected in parallel to the protector FR16, the other end of the protector FR16 is connected to the protectors FR14 and FR11 in sequence, the other ends of the normally open contacts of the protectors FR11, FR12, FR15, FR17, FR19 and the intermediate relay KA12 are connected to the negative pole of the secondary side of the transformer TR3; The intermediate relays KA12 to KA17 are connected to the output end of the output module of the PLC; The normally open main contacts of the relays KM19 to KM26 are respectively arranged on the power supply lines of the electromagnetic heater EHoT2, the motor M6, the motor M7, the motor M8, the motor M9, the motor M10, the motor M11, and the refrigeration device COOLerD.

2. The lubricating oil pump electronic control system of the nozzle booster regulator test bench according to claim 1, characterized in that: One end of the normally open auxiliary contact of the contactors KM19 to KM26 is respectively connected to the input end of the PLC input module, and the other end is connected in parallel to the PLC+24V power supply.

3. The lubricating oil pump electronic control system of the nozzle booster regulator test bench according to claim 1, characterized in that: One end of the auxiliary contacts of the intermediate relays KA12 to KA17 is connected in parallel to the PLC+24V power supply, and the other end is connected to an indicator light, and the other end of the indicator light is connected in parallel to the PLC-24V power supply.

4. The lubricating oil pump electronic control system of the nozzle booster regulator test bench according to claim 1, characterized in that: An indicator light HR5 is also connected between the two ends of the secondary side of the transformer TR3, and a fuse FU14 is also provided at the positive pole of the secondary side of the transformer TR3.

5. The lubricating oil pump electronic control system of the nozzle booster regulator test bench as claimed in claim 4, characterized in that: The primary side of the transformer TR is connected to any two phases of a 380V three-phase line.

6. The lubricating oil pump electronic control system of the nozzle booster regulator test bench according to claim 1, characterized in that: The motors M6 and M7, the motors M8 and M9, and the motors M10 and M11 are standby motors for each other and are respectively connected in parallel to the 380V power supply bus.

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