阅读说明：本技术 基于气动泵和电动泵的发电机滑油系统及安全保护方法 (Generator lubricating oil system based on pneumatic pump and electric pump and safety protection method ) 是由 赵宸翦 张权 胡逢源 王恒 孙瀚青 于 2021-08-24 设计创作，主要内容包括：本发明涉及一种基于气动泵和电动泵的发电机滑油系统及安全保护方法,该系统包括发电机滑油箱、电动滑油泵、气动滑油泵、配电箱、控制箱,两台电动滑油泵和气动滑油泵的输入端分别连接发电机滑油箱,输出端分别连接发电机,为发电机前后端轴承提供滑油,通过两台电动滑油泵和一台气动滑油泵互为备份,保障发电机滑油系统长期可靠运行。该方法采用气动、电动两种来实现发电机滑油的供给；通过两台电动泵和一台气动泵互为备份,可以保障滑油系统长期可靠运行；可避免外围供电中断而导致发电机无法安全停机或起动的问题以及避免外围供电中断而导致发电机被迫停机的问题。(The invention relates to a generator lubricating oil system based on a pneumatic pump and an electric pump and a safety protection method. The method adopts two modes of pneumatic and electric to realize the supply of the generator lubricating oil; the two electric pumps and the pneumatic pump are mutually backed up, so that the long-term reliable operation of the lubricating oil system can be guaranteed; the problem that the generator cannot be safely shut down or started due to the interruption of the peripheral power supply and the problem that the generator is forced to shut down due to the interruption of the peripheral power supply can be avoided.)

1. The utility model provides a generator lubricating oil system based on pneumatic pump and electric pump which characterized in that: the generator lubricating oil system comprises a generator lubricating oil tank, electric lubricating oil pumps, pneumatic lubricating oil pumps, a distribution box and a control box, wherein the input ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pumps are respectively connected with the generator lubricating oil tank, the output ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pumps are respectively connected with a generator, lubricating oil is provided for bearings at the front end and the rear end of the generator, and the two electric lubricating oil pumps and the pneumatic lubricating oil pumps are mutually backup to ensure long-term reliable operation of the generator lubricating oil system.

2. The pneumatic and electric pump based generator lube system of claim 1, wherein: the input ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pump are connected with a generator lubricating oil tank through a lubricating oil heater, a one-way valve and a lubricating oil coarse filter, and the oil outlet ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pump are connected with front and rear end bearings of a generator through a lubricating oil fine filter, a lubricating oil cooler, a thermostatic valve and a flow switch.

3. The pneumatic and electric pump based generator lube system of claim 1, wherein: the distribution box is connected with the two electric lubricating oil pumps and is connected with the pneumatic lubricating oil pump through the control box.

4. The pneumatic and electric pump based generator lube system of claim 1, wherein: the control power of the control box is provided by a peripheral DC24V uninterruptible power supply UPS, and the power supply of the electric lubricating oil pump is provided by a peripheral AC 380V.

5. The pneumatic and electric pump-based generator lube system of claim 4, wherein: under the condition of normal power supply, the generator lubricating oil passes through a lubricating oil coarse filter, a one-way valve, a lubricating oil heater, two electric lubricating oil pumps and a lubricating oil fine filter from a generator lubricating oil tank, then is divided into two paths, passes through a lubricating oil cooler and a thermostatic valve to adjust the temperature of the lubricating oil, then enters the front and rear end bearings of the generator after being distributed by a flow switch, and then is returned into the generator lubricating oil tank from a bearing oil outlet by gravity after lubricating the bearings.

6. The pneumatic and electric pump-based generator lube system of claim 5, wherein: when the whole ship loses power, the peripheral AC380V power supply is interrupted, the generator runs at high load at the moment, and when the electric lubricating oil pump stops working, the control box outputs a control signal to the pneumatic lubricating oil pump after detecting that the flow of lubricating oil is too low, starts the pneumatic lubricating oil pump to supply oil, and ensures the flow entering the front bearing and the rear bearing of the generator.

7. The pneumatic and electric pump-based generator lube system of claim 5, wherein: when the whole ship loses power, the power supply of the peripheral AC380V is interrupted, the generator needs to be started in an emergency, and when the electric lubricating oil pump cannot be used, the control box outputs a control signal to the pneumatic lubricating oil pump to start the pneumatic lubricating oil pump, so that the flow entering the front bearing and the rear bearing of the generator is guaranteed, the lubricating oil is pre-supplied, and the generator is safely and smoothly started.

8. The pneumatic and electric pump based generator lube system of claim 6 or 7, wherein: when the power supply of the peripheral AC380V is recovered, the control box outputs control signals to the electric lubricating oil pump and the pneumatic lubricating oil pump, the electric lubricating oil pump is started to be used, and the pneumatic lubricating oil pump stops working.

9. A generator lubricating oil system safety protection method, which adopts the generator lubricating oil system based on the pneumatic pump and the electric pump, as claimed in claim 1, and is characterized in that: when the generator is started successfully, if an emergency stop signal that the electric lubricating oil pump does not operate and the bearing flow of the generator is low is detected, the pneumatic lubricating oil pump is started immediately at the moment, an operation overtime alarm is sent after the pneumatic lubricating oil pump operates for 1min, an operation overtime stop alarm is sent after the pneumatic lubricating oil pump operates for 2min, the pneumatic lubricating oil pump can be stopped after confirmation, and response reset is carried out; when the generator is not started, the override judgment is carried out at the moment, if the electric lubricating oil pump does not operate, the pneumatic lubricating oil pump is started, the operation overtime alarm is sent out after the pneumatic lubricating oil pump operates for 1min, the operation overtime stop alarm of the pneumatic lubricating oil pump is sent out after the pneumatic lubricating oil pump operates for 2min, the pneumatic lubricating oil pump can be stopped after confirmation, and the response reset is carried out.

Technical Field

The invention relates to a comprehensive security technology of a marine high-power diesel generator set, in particular to a generator lubricating oil system and a security protection method.

Background

The marine high-power generator adopts a sliding bearing structure, in the running process of the generator, the lubricating oil supply of the bearing is mainly realized by peripheral auxiliary equipment, and the electric lubricating oil pump can realize the lubricating oil supply and provide a certain flow of lubricating oil for the bearings at the front end and the rear end of the generator.

However, the stable operation of the electric lubricating oil pump depends on peripheral power supply, when the whole ship loses power, the electric lubricating oil pump cannot supply oil normally, the generator is stopped emergently or the generator is started emergently under the emergency condition, and at the moment, the sliding bearing of the generator is easy to cause abnormal abrasion of the bearing structure due to insufficient supply of the lubricating oil, the service life is shortened, and the long-term safe operation of the generator is not facilitated.

Disclosure of Invention

The invention aims to solve the technical problem of providing a generator lubricating oil system based on a pneumatic pump and an electric pump, which realizes the safety protection function of emergency stop or emergency start of a generator without depending on the stability of peripheral power supply.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a generator lubricating oil system based on pneumatic pump and electric pump, includes generator lubricating oil case, electric lubricating oil pump, pneumatic lubricating oil pump, block terminal, control box, and the generator lubricating oil case is connected respectively to the input of two electric lubricating oil pumps and pneumatic lubricating oil pump, and the generator is connected respectively to the output, provides the lubricating oil for generator front and back end bearing, mutually for the backup through two electric lubricating oil pumps and a pneumatic lubricating oil pump, ensures the long-term reliable operation of generator lubricating oil system.

Furthermore, the input ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pump are connected with a generator lubricating oil tank through a lubricating oil heater, a one-way valve and a lubricating oil coarse filter, and the oil outlet ends of the two electric lubricating oil pumps and the pneumatic lubricating oil pump are connected with front and rear end bearings of a generator through a lubricating oil fine filter, a lubricating oil cooler, a thermostatic valve and a flow switch.

Furthermore, the distribution box is connected with two electric lubricating oil pumps and is connected with the pneumatic lubricating oil pump through a control box.

Further, the control power of the control box is provided by a peripheral DC24V uninterruptible power supply UPS, and the power supply of the electric lubricating oil pump is provided by a peripheral AC 380V.

Further, under the condition of normal power supply, the generator lubricating oil passes through a lubricating oil coarse filter, a one-way valve and a lubricating oil heater from a generator lubricating oil tank, and two electric lubricating oil pumps and a lubricating oil fine filter, then is divided into two paths, passes through a lubricating oil cooler and a thermostatic valve to adjust the temperature of the lubricating oil, then enters the front and rear end bearings of the generator after being distributed by a flow switch, and is returned into the generator lubricating oil tank from the oil outlet of the bearing by gravity after lubricating the bearings.

Further, when the whole ship loses power, the peripheral AC380V is powered off, the generator runs at high load at the moment, and when the electric lubricating oil pump stops working, the control box detects that the flow of lubricating oil is too low and then outputs a control signal to the pneumatic lubricating oil pump, so that the pneumatic lubricating oil pump is started to supply oil, and the flow entering the front bearing and the rear bearing of the generator is ensured.

Further, when the power of the whole ship is lost, the power supply of the peripheral AC380V is interrupted, the generator needs to be started in an emergency, and when the electric lubricating oil pump cannot be used, the control box outputs a control signal to the pneumatic lubricating oil pump to start the pneumatic lubricating oil pump, so that the flow entering the front bearing and the rear bearing of the generator is guaranteed, the lubricating oil is pre-supplied, and the generator is safely and smoothly started.

Further, after the power supply of the peripheral AC380V is recovered, the control box outputs a control signal to the electric lubricating oil pump and the pneumatic lubricating oil pump, the electric lubricating oil pump is started to be used, and the pneumatic lubricating oil pump is stopped to work.

A generator lubricating oil system safety protection method is based on a pneumatic pump and an electric pump, when a generator is started successfully, if an emergency stop signal that the electric lubricating oil pump does not operate and the bearing flow of the generator is low is detected, the pneumatic lubricating oil pump is started immediately at the moment, an operation overtime alarm is sent after the pneumatic lubricating oil pump operates for 1min, an operation overtime pump stop alarm is sent after the pneumatic lubricating oil pump operates for 2min, the pneumatic lubricating oil pump can be stopped after confirmation, and response reset is carried out; when the generator is not started, the override judgment is carried out at the moment, if the electric lubricating oil pump does not operate, the pneumatic lubricating oil pump is started, the operation overtime alarm is sent out after the pneumatic lubricating oil pump operates for 1min, the operation overtime stop alarm of the pneumatic lubricating oil pump is sent out after the pneumatic lubricating oil pump operates for 2min, the pneumatic lubricating oil pump can be stopped after confirmation, and the response reset is carried out.

The invention has the beneficial effects that:

compared with the original comprehensive security technology of the marine high-power diesel generator set, the generator lubricating oil system based on the pneumatic pump and the electric pump and the safety protection method have the following characteristics:

(1) the supply of the generator lubricating oil is realized by two principles of pneumatics and electromotion;

(2) the two electric pumps and the pneumatic pump are mutually backed up, so that the long-term reliable operation of the lubricating oil system can be guaranteed;

(3) the problem that the generator cannot be safely shut down or started due to interruption of peripheral power supply can be avoided;

(4) the problem that the power supply of the periphery is interrupted to cause the forced shutdown of the generator can be avoided.

Drawings

FIG. 1 is a diagram of a pneumatic and electric pump based generator oil system;

FIG. 2 is a schematic diagram of an application of a generator lubricating oil system based on a pneumatic pump and an electric pump on a marine diesel generator set;

FIG. 3 is a generator lube system and safety strategy logic diagram based on pneumatic and electric pumps;

in the figure: 1. the lubricating oil system comprises a generator lubricating oil tank, 2, a lubricating oil coarse filter, 3, a one-way valve, 4, a lubricating oil heater, 5, an electric lubricating oil pump (1#, 2#), 6, a pneumatic lubricating oil pump, 7, a lubricating oil fine filter, 8, a lubricating oil cooler, 9, a thermostatic valve, 10, a temperature sensor, 11, a flow switch, 12, a generator, 13, a distribution box, 14, a control box, 15 and a diesel engine.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, the generator lubricating oil system based on the pneumatic pump and the electric pump of the present invention mainly comprises a generator lubricating oil tank 1, a lubricating oil coarse filter 2, a one-way valve 3, a lubricating oil heater 4, an electric lubricating oil pump 5(1#, 2#), a pneumatic lubricating oil pump 6, a lubricating oil fine filter 7, a lubricating oil cooler 8, a thermostatic valve 9, a temperature sensor 10, a flow switch 11, a generator 12, a distribution box 13, a control box 14, and other devices.

The electric lubricating oil pump 5(1#, 2#) is connected with the pneumatic lubricating oil pump 6 in parallel, the oil inlet end after parallel connection is connected with the generator lubricating oil tank 1 through the lubricating oil heater 4, the one-way valve 3 and the lubricating oil coarse filter 2, and the oil outlet end is connected with the front and rear end bearings of the generator 12 through the lubricating oil fine filter 7, the lubricating oil cooler 8, the thermostatic valve 9 and the flow switch 11. The distribution box 13 is connected with the electric lubricating oil pumps 5(1#, 2#) and is connected with the pneumatic lubricating oil pump 6 through the control box 14.

The control electricity of the control box is provided by a peripheral DC24V Uninterrupted Power Supply (UPS), the power supply of the electric lubricating oil pump is provided by a peripheral AC380V, under the condition of normal power supply, the generator lubricating oil passes through a generator lubricating oil tank 1, a lubricating oil coarse filter 2, a one-way valve 3, a lubricating oil heater 4, a No. 1 and No. 2 electric lubricating oil pump 5 and a lubricating oil fine filter 7, then passes through two paths of lubricating oil after being adjusted in temperature by a lubricating oil cooler 8 and a thermostatic valve 9, then enters a front end bearing and a rear end bearing of the generator 12 after being distributed by a flow switch 11, and is gravity-fed back from an oil outlet of the bearing to enter the generator lubricating oil tank 1 after being lubricated by the bearing.

As shown in fig. 3, when the power is lost, the power supply of the peripheral AC380V is interrupted, so that the generator 12 is running at a high load, the electric lubricating oil pump 5 stops working, and the control box 14 detects that the flow of the lubricating oil is too low, and starts the pneumatic lubricating oil pump 6 to supply oil, so as to guarantee the flow entering the front and rear bearings of the generator 12, and at this time, the generator 12 can be ensured to be safely stopped, or the power supply of the peripheral AC380V is recovered, and the electric lubricating oil pump 5 is put into use again.

When the power of the whole ship is lost, the peripheral AC380V is powered off, so that the generator 12 needs to be started in an emergency, and the electric lubricating oil pump 5 cannot be used, the control box 14 controls the pneumatic lubricating oil pump 6 to start, the flow entering the front bearing and the rear bearing of the generator 12 is guaranteed, the lubricating oil is pre-supplied, the generator 12 is guaranteed to be started safely and smoothly, and after the peripheral AC380V is powered back, the electric lubricating oil pump 5 is used, and the pneumatic lubricating oil pump 6 stops working.

As shown in FIG. 2, a diesel generator set is provided with a generator lubricating oil system based on a pneumatic pump and an electric pump, and the safety strategy control logic diagram is shown in FIG. 3. When the generator is started successfully, if an emergency stop signal that the electric lubricating oil pump 5 is not operated and the bearing flow of the generator is low is detected, the pneumatic lubricating oil pump 6 is started immediately at the moment, an operation overtime alarm is sent after the pneumatic lubricating oil pump 6 operates for 1min, an operation overtime stop alarm is sent after the pneumatic lubricating oil pump 6 operates for 2min, the pneumatic lubricating oil pump can be stopped after confirmation, and response reset is carried out; when the generator 12 is not started, the override judgment is carried out at the moment, if the electric lubricating oil pump 5 is not operated, the pneumatic lubricating oil pump 6 is started, the operation overtime alarm is sent out after the pneumatic lubricating oil pump 6 operates for 1min, the operation overtime stop alarm of the pneumatic lubricating oil pump 6 is sent out after the pneumatic lubricating oil pump 5 operates for 2min, the pneumatic lubricating oil pump 6 can be stopped after confirmation, and the response reset is carried out.