Maintenance lubricating system for reduction gearbox of large vertical seawater circulating pump

Abstract

The utility model belongs to the technical field of maintenance of large rotating equipment in a nuclear power station, and particularly relates to a maintenance lubricating system for a reduction gearbox of a large vertical seawater circulating pump, which comprises a high-pressure oil pump auxiliary device, a low-pressure oil pump auxiliary device and a maintenance oil tank, inlet pipelines of the high-pressure oil pump auxiliary device and the low-pressure oil pump auxiliary device are respectively connected with the maintenance oil tank, and outlet pipelines of the high-pressure oil pump auxiliary device and the low-pressure oil pump auxiliary device are respectively connected with a top shaft oil interface and a lubricating oil joint interface of the circulating pump gear box. When the seawater circulating pump is overhauled, the system provided by the utility model can provide gear and bearing lubrication required by gear box turning and no-load, and has the functions of purifying and heating the lubricating oil, so that the equipment can be supplied with the lubricating oil with standard operation during the overhauling period.

Description

Technical Field

[0001] The utility model belongs to the technical field of maintenance of large rotating equipment in nuclear power plants, and in particular relates to a maintenance lubrication system for a large vertical seawater circulation pump reducer. Background Art

[0002] Due to the large flow rate and low speed, the seawater circulation pump of a nuclear power plant is generally designed with a matching gearbox and a lubricating oil system. During the overhaul, the official lubricating oil station is under maintenance, resulting in a lack of offline oil stations to slow down during the inspection and reinstallation of the main equipment. At the same time, the design of the official oil station system components is cumbersome and the control logic is complex, which is not suitable for rapid commissioning and switching during equipment maintenance. It is not flexible and easy to operate.

[0003] The above difficulties seriously restrict the maintenance of large vertical centrifugal pumps in nuclear power plants. In order to solve the above problems, it is urgent to design and manufacture a set of offline oil station system for gearbox maintenance. Utility Model Content

[0004] The utility model aims to provide a large-scale vertical seawater circulating pump gearbox maintenance lubrication system, which can provide the gear and bearing lubrication required for gearbox turning and no-load during the maintenance of the seawater circulating pump, as well as the purification and heating functions of the lubricating oil, so as to ensure that the equipment is supplied with lubricating oil of the operating standard during the maintenance period.

[0005] Technical solution to achieve the purpose of this utility model:

[0006] A large vertical seawater circulating pump gearbox maintenance lubrication system, the system comprising: a high-pressure oil pump auxiliary device, a low-pressure oil pump auxiliary device, and a maintenance oil tank; the inlet pipes of the high-pressure oil pump auxiliary device and the low-pressure oil pump auxiliary device are respectively connected to the maintenance oil tank, and the outlet pipes of the high-pressure oil pump auxiliary device and the low-pressure oil pump auxiliary device are respectively connected to the top shaft oil interface and the lubricating oil joint interface of the circulating pump gearbox.

[0007] The system also includes an oil filter, which is connected to the maintenance oil tank and is used to remove impurities and moisture in the system lubricating oil.

[0008] The high-pressure oil pump auxiliary device includes: a high-pressure oil pump mobile trolley, a high-pressure oil pump, a high-pressure filter, a safety valve, and a high-pressure oil pump stop valve. The high-pressure oil pump, the high-pressure filter, the safety valve, and the high-pressure oil pump stop valve are all installed on the high-pressure oil pump mobile trolley, and the high-pressure oil pump, the safety valve, the high-pressure filter, and the high-pressure oil pump stop valve are connected in sequence.

[0009] The high-pressure oil pump auxiliary device also includes: a first high-pressure oil pump pressure gauge and a second high-pressure oil pump pressure gauge. The first high-pressure oil pump pressure gauge is installed downstream of the high-pressure filter, and the second high-pressure oil pump pressure gauge is installed upstream of the high-pressure filter.

[0010] The high-pressure oil pump auxiliary device also includes: a high-pressure oil pump caster, which is installed at the bottom of the high-pressure oil pump mobile vehicle.

[0011] The low-pressure oil pump auxiliary device includes: a low-pressure oil pump mobile trolley, a low-pressure oil pump, a low-pressure filter, a relief valve, and a low-pressure oil pump stop valve. The low-pressure oil pump, the low-pressure filter, the relief valve, and the low-pressure oil pump stop valve are installed on the low-pressure oil pump mobile trolley, and the low-pressure oil pump, the relief valve, the low-pressure filter, and the low-pressure oil pump stop valve are connected in sequence.

[0012] The low-pressure oil pump auxiliary device also includes: a first low-pressure oil pump pressure gauge and a second low-pressure oil pump pressure gauge. The first low-pressure oil pump pressure gauge is installed downstream of the low-pressure filter, and the second low-pressure oil pump pressure gauge is installed upstream of the low-pressure filter.

[0013] The low-pressure oil pump auxiliary device also includes: a low-pressure oil pump caster, and the low-pressure oil pump caster is installed at the bottom of the low-pressure oil pump mobile vehicle.

[0014] The maintenance oil tank includes: a first heater, a second heater, and a control cabinet. The control cabinet is installed on the maintenance oil tank. The first heater and the second heater are respectively installed at the bottom of the maintenance oil tank. The control cabinet is connected to the first heater and the second heater respectively. The control cabinet controls the opening and closing of the first heater and the second heater by detecting the temperature of the lubricating oil in the maintenance oil tank.

[0015] The inspection oil tank also includes: a breather and an oil level gauge. The breather is installed on the top of the inspection oil tank, and the oil level gauge is installed on the inspection oil tank to monitor the liquid level of the lubricating oil in the inspection oil tank.

[0016] The beneficial technical effects of the utility model are:

[0017] 1. The utility model provides a large vertical seawater circulation pump reducer maintenance lubrication system, which has a simple structure and is easy to operate.

[0018] 2. The utility model provides a large-scale vertical seawater circulation pump gearbox maintenance lubrication system, which can make the gearbox ready for use when the maintenance work of the main equipment is not completed.

[0019] 3. The utility model provides a large-scale vertical seawater circulation pump reducer maintenance lubrication system, which can improve the maintenance efficiency and shorten the maintenance period of the equipment.

[0020] 4. The utility model provides a large-scale vertical seawater circulation pump reducer maintenance lubrication system, which can effectively ensure the supply of lubricating oil with operating standards during the maintenance period.

[0021] 5. The utility model provides a large-scale vertical seawater circulation pump reducer maintenance lubrication system, which can simplify the interface connection and planning coordination work of various professions and reduce manpower support. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a large vertical seawater circulation pump reducer maintenance lubrication system provided by the utility model;

[0023] Figure 2 A schematic diagram of the structure of a high-pressure oil pump auxiliary device in a large vertical seawater circulation pump reducer maintenance lubrication system provided by the utility model;

[0024] Figure 3 A schematic diagram of the structure of a low-pressure oil pump auxiliary device in a large vertical seawater circulation pump reducer overhaul lubrication system provided by the utility model;

[0025] Figure 4 The utility model provides a schematic diagram of the structure of a maintenance oil tank in a maintenance lubrication system for a large-scale vertical seawater circulation pump reducer.

[0026] In the figure:

[0027] 100-high-pressure oil pump auxiliary device; 200-low-pressure oil pump auxiliary device; 300-inspection oil tank; 400-oil filter; 500-gear box;

[0028] 101- high-pressure oil pump caster; 102- high-pressure oil pump mobile trolley; 103- high-pressure oil pump; 104- high-pressure filter; 105- first high-pressure oil pump pressure gauge; 106- safety valve; 107- second high-pressure oil pump pressure gauge; 108- high-pressure oil pump stop valve;

[0029] 201- low-pressure oil pump caster; 202- low-pressure oil pump mobile trolley; 203- low-pressure oil pump; 204- low-pressure filter; 205- overflow valve; 206- first low-pressure oil pump pressure gauge; 207- second low-pressure oil pump pressure gauge; 208- low-pressure oil pump stop valve;

[0030] 301 - first heater; 302 - second heater; 303 - control cabinet; 304 - respirator; 305 - oil level gauge. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0032] like Figure 1As shown, the utility model provides a large-scale vertical seawater circulating pump reducer maintenance lubrication system, comprising: a high-pressure oil pump auxiliary device 100, a low-pressure oil pump auxiliary device 200, a maintenance oil tank 300, and an oil filter 400; the inlet pipes of the high-pressure oil pump auxiliary device 100 and the low-pressure oil pump auxiliary device 200 are respectively connected to the maintenance oil tank 300 through high-pressure rubber hoses and standard threaded joints, and the outlet pipes of the high-pressure oil pump auxiliary device 100 and the low-pressure oil pump auxiliary device 200 are respectively connected to the top shaft oil interface and the lubricating oil joint interface of the circulating pump gear box 500 through high-pressure rubber hoses and standard threaded joints; the oil filter 400 is connected to the maintenance oil tank 300 through a rubber hose and a standard joint, and is used to remove impurities and moisture in the system lubricating oil.

[0033] like Figure 2 As shown, the high-pressure oil pump auxiliary device 100 includes: a high-pressure oil pump caster 101, a high-pressure oil pump mobile cart 102, a high-pressure oil pump 103, a high-pressure filter 104, a first high-pressure oil pump pressure gauge 105, a safety valve 106, a second high-pressure oil pump pressure gauge 107, and a high-pressure oil pump stop valve 108.

[0034] The high-pressure oil pump 103, the high-pressure filter 104, the first high-pressure oil pump pressure gauge 105, the safety valve 106, the second high-pressure oil pump pressure gauge 107, and the high-pressure oil pump stop valve 108 are all installed on the bottom plate of the high-pressure oil pump mobile trolley 102, and the high-pressure oil pump caster 101 is installed at the bottom of the high-pressure oil pump mobile trolley 102. The equipment is compact and easy to move and install. The high-pressure oil pump 103, the safety valve 106, the second high-pressure oil pump pressure gauge 107, the high-pressure filter 104, the first high-pressure oil pump pressure gauge 105, and the high-pressure oil pump stop valve 108 are connected in sequence.

[0035] The large vertical seawater circulation pump gearbox maintenance lubrication system of the utility model adopts a high-pressure oil pump auxiliary device 100 to meet the requirements of the top shaft before the operation of the gearbox 500, and is designed with a mobile high-pressure lubricating oil pump station with casters 101 and a special device for providing pressure oil for the top shaft. Its working principle is as follows: the high-pressure oil pump 103 sucks oil, generates hydraulic oil, and is regulated by the safety valve 106, and passes through the high-pressure filter 104 to keep the output pressure of the high-pressure oil pump 103 constant, thereby providing the top shaft oil pressure before the gearbox 500 is started.

[0036] High-pressure oil pump auxiliary device 100: Before the gearbox 500 is cranked or started, the high-pressure oil pump auxiliary device 100 provides top shaft oil for the thrust bearing of the gearbox. Ensure the establishment of the thrust bearing oil film during the gearbox startup phase, and ensure the lubrication and cooling of the thrust bearing during the operation of the equipment. After the gearbox 500 rotates stably, it can be manually cut off. The high-pressure oil pump auxiliary device 100 is equipped with a first high-pressure oil pump pressure gauge 105, a second high-pressure oil pump pressure gauge 107, a high-pressure filter 104 and a safety valve 106. After debugging, it ensures the outlet pressure of the high-pressure oil pump 103 to meet the startup requirements of the gearbox 500.

[0037] like Figure 3 As shown, the low-pressure oil pump auxiliary device 200 includes: a low-pressure oil pump caster 201, a low-pressure oil pump mobile cart 202, a low-pressure oil pump 203, a low-pressure filter 204, a relief valve 205, a first low-pressure oil pump pressure gauge 206, a second low-pressure oil pump pressure gauge 207, and a low-pressure oil pump stop valve 208.

[0038] The low-pressure oil pump 203, the low-pressure filter 204, the relief valve 205, the first low-pressure oil pump pressure gauge 206, the second low-pressure oil pump pressure gauge 207, and the low-pressure oil pump stop valve 208 are installed on the bottom plate of the low-pressure oil pump mobile trolley 202, and the low-pressure oil pump caster 201 is installed at the bottom of the low-pressure oil pump mobile trolley 202. The equipment is compact and easy to move and install. The low-pressure oil pump 203, the relief valve 205, the second low-pressure oil pump pressure gauge 207, the low-pressure filter 204, the first low-pressure oil pump pressure gauge 206, and the low-pressure oil pump stop valve 208 are connected in sequence.

[0039] The large vertical seawater circulation pump reducer maintenance lubrication system of the utility model adopts a low-pressure oil pump auxiliary device 200 to achieve lubrication and cooling of sliding bearings and gear components. Its working principle is as follows: the low-pressure oil pump 203 sucks oil to generate hydraulic oil, which is adjusted by the overflow valve 205 and passes through the low-pressure filter 204 to keep the output pressure of the low-pressure oil pump 203 constant, thereby completing the thin oil lubrication. The second low-pressure oil pump pressure gauge 207 installed on the pipeline is used to adjust the overflow valve and is used to observe the oil pump pressure on site. The oil supply port is equipped with a first low-pressure oil pump pressure gauge 206 to observe the pressure of the oil supply port.

[0040] Low-pressure oil pump auxiliary device 200: During manual cranking or operation of the gearbox 500, it ensures that the gearbox gears, planetary gear shaft sliding bearings and guide bearing components are fully lubricated. The low-pressure oil pump auxiliary device 200 is provided with a low-pressure filter 204, an outlet low-pressure oil pump stop valve 208 and a relief valve 205. It ensures safe and stable operation of the system, and at the same time, the outlet pressure meets the lubrication and cooling needs of various components.

[0041] like Figure 4As shown, the maintenance oil tank 300 includes: a 3KW 220V first heater 301, a 3KW 220V second heater 302, a control cabinet 303, a respirator 304, and an oil level gauge 305. The control cabinet 303 is installed on the maintenance oil tank 300, the first heater 301 and the second heater 302 are respectively installed at the bottom of the maintenance oil tank 300, and the control cabinet 303 is connected to the first heater 301 and the second heater 302 respectively. The control cabinet 303 controls the opening and closing of the first heater 301 and the second heater 302 by detecting the temperature of the lubricating oil in the maintenance oil tank 300. The respirator 304 is installed on the top of the maintenance oil tank 300, and the oil level gauge 305 is installed on the inspection oil tank 300 to monitor the liquid level of the lubricating oil in the maintenance oil tank 300.

[0042] Maintenance oil tank 300: used for storage and purification of lubricating oil during maintenance of gearbox 500. The oil tank is equipped with a first heater 301 and a second heater 302, which can control the temperature of the lubricating oil and adjust the oil viscosity to improve the operating efficiency of the entire system, while ensuring that the oil index and temperature of the gearbox 500 meet the operating requirements. When the oil temperature reaches the gearbox startup standard, the electric heater will automatically cut off the power.

[0043] The gearbox 500 is inspected by using the large vertical seawater circulating pump reduction box inspection and lubrication system of the utility model. The specific steps are as follows: turn on the power; start the motor to confirm that the motor is rotating correctly; officially start the two oil stations of the high-pressure oil pump auxiliary device 100 and the low-pressure oil pump auxiliary device 200. After the oil system of the high-pressure oil pump auxiliary device 100 and the low-pressure oil pump auxiliary device 200 runs stably, the operation inspection of the circulating pump gearbox is carried out. When starting for the first time or when it is stopped for a long time, pay attention to loosening the joint of the oil outlet pipe to exhaust the air, and the oil pump should be started under no-load conditions.

[0044] The large vertical seawater circulation pump gearbox maintenance lubrication system of the utility model can ensure that during the equipment maintenance period, the gearbox lubrication and cooling functions can be realized by replacing the formal lubricating oil system. And according to the needs of actual maintenance work, the lubrication system is optimized to ensure the smooth implementation of the seawater circulation pump turning centering, no-load test operation and other work.

[0045] The utility model is described in detail above with reference to the accompanying drawings and embodiments, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the utility model. The contents not described in detail in the utility model can adopt the existing technology.

Claims

1. A large vertical seawater circulation pump reducer maintenance lubrication system, characterized in that: The system comprises: a high-pressure oil pump auxiliary device (100), a low-pressure oil pump auxiliary device (200), and a maintenance oil tank (300); the inlet pipes of the high-pressure oil pump auxiliary device (100) and the low-pressure oil pump auxiliary device (200) are respectively connected to the maintenance oil tank (300), and the outlet pipes of the high-pressure oil pump auxiliary device (100) and the low-pressure oil pump auxiliary device (200) are respectively connected to the top shaft oil interface and the lubricating oil joint interface of the circulating pump gear box (500).

2. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 1, characterized in that: The system further comprises an oil filter (400), which is connected to the maintenance oil tank (300) and is used to remove impurities and moisture from the system lubricating oil.

3. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 1, characterized in that: The high-pressure oil pump auxiliary device (100) comprises: a high-pressure oil pump moving trolley (102), a high-pressure oil pump (103), a high-pressure filter (104), a safety valve (106), and a high-pressure oil pump stop valve (108); the high-pressure oil pump (103), the high-pressure filter (104), the safety valve (106), and the high-pressure oil pump stop valve (108) are all installed on the high-pressure oil pump moving trolley (102); the high-pressure oil pump (103), the safety valve (106), the high-pressure filter (104), and the high-pressure oil pump stop valve (108) are connected in sequence.

4. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 3, characterized in that: The high-pressure oil pump auxiliary device (100) further comprises: a first high-pressure oil pump pressure gauge (105) and a second high-pressure oil pump pressure gauge (107), wherein the first high-pressure oil pump pressure gauge (105) is installed downstream of the high-pressure filter (104), and the second high-pressure oil pump pressure gauge (107) is installed upstream of the high-pressure filter (104).

5. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 3, characterized in that: The high-pressure oil pump auxiliary device (100) further comprises: a high-pressure oil pump caster (101), wherein the high-pressure oil pump caster (101) is installed at the bottom of the high-pressure oil pump mobile trolley (102).

6. A large-scale vertical seawater circulation pump reduction box maintenance lubrication system according to claim 1, characterized in that: The low-pressure oil pump auxiliary device (200) comprises: a low-pressure oil pump moving trolley (202), a low-pressure oil pump (203), a low-pressure filter (204), a relief valve (205), and a low-pressure oil pump stop valve (208); the low-pressure oil pump (203), the low-pressure filter (204), the relief valve (205), and the low-pressure oil pump stop valve (208) are installed on the low-pressure oil pump moving trolley (202); the low-pressure oil pump (203), the relief valve (205), the low-pressure filter (204), and the low-pressure oil pump stop valve (208) are connected in sequence.

7. A large vertical seawater circulation pump reduction box maintenance lubrication system according to claim 6, characterized in that: The low-pressure oil pump auxiliary device (200) further comprises: a first low-pressure oil pump pressure gauge (206) and a second low-pressure oil pump pressure gauge (207); the first low-pressure oil pump pressure gauge (206) is installed downstream of the low-pressure filter (204), and the second low-pressure oil pump pressure gauge (207) is installed upstream of the low-pressure filter (204).

8. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 6, characterized in that: The low-pressure oil pump auxiliary device (200) further comprises: a low-pressure oil pump caster (201), wherein the low-pressure oil pump caster (201) is installed at the bottom of the low-pressure oil pump mobile trolley (202).

9. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 1, characterized in that: The maintenance oil tank (300) comprises: a first heater (301), a second heater (302), and a control cabinet (303); the control cabinet (303) is installed on the maintenance oil tank (300); the first heater (301) and the second heater (302) are respectively installed at the bottom of the maintenance oil tank (300); the control cabinet (303) is respectively connected to the first heater (301) and the second heater (302); the control cabinet (303) controls the opening and closing of the first heater (301) and the second heater (302) by detecting the temperature of the lubricating oil in the maintenance oil tank (300).

10. A large vertical seawater circulation pump reducer maintenance lubrication system according to claim 9, characterized in that: The inspection oil tank (300) further comprises: a breather (304) and an oil level gauge (305); the breather (304) is mounted on the top of the inspection oil tank (300); and the oil level gauge (305) is mounted on the inspection oil tank (300) and is used to monitor the liquid level of the lubricating oil in the inspection oil tank (300).

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