CN218669494U - Shared self-driven lubricating and cooling system for two bearings of emergency diesel generator - Google Patents

Abstract

The invention discloses a shared self-driven lubricating and cooling system for two bearings of an emergency diesel generator, which solves the problem of how to realize self-circulation cooling of lubricating oil in the bearings of the emergency generator without power supply; the traditional technical means that a motor drives lubricating oil to complete circulating cooling is abandoned, the lubricating oil is driven by a gear pump, the gear pump is skillfully integrated at the non-driving end of the generator, and the self-driving circulation of the lubricating oil in a motor bearing along with the rotation of a rotating shaft of the generator is realized; hanging a circulating lubricating oil cooler on an air inlet window of a motor, and cooling lubricating oil by using cooling air of the motor; the lubricating oil cooling systems of the front bearing and the rear bearing are combined into a whole, the lubricating oil supply pipes of the two bearings are subjected to reducing treatment to solve the problem that the lubricating oil in the two bearings has different oil return speeds due to different gravitational potential energies of the self weights, and the lubricating oil in the two bearings can be kept at the working oil level after the circulating system is shared.

Description

Shared self-driven lubricating and cooling system for two bearings of emergency diesel generator

Technical Field

The invention relates to a generator driven by a diesel engine, in particular to a lubricating oil circulating cooling device and a circulating cooling method for a bearing of an emergency generator used after a nuclear power station is powered off.

Background

The emergency diesel generator of the nuclear power station is arranged in the emergency power supply center of the nuclear power station, when the nuclear power station has an accident and the power system of the nuclear power station loses normal power supply, the diesel generator is started to generate power and provide power supply for safety level equipment in the station so as to ensure the functions executed by the equipment; the bearing lubricating oil of the emergency generator is used for cooling and lubricating a bearing by adopting a forced lubricating system; the emergency generator is characterized in that a front end cover of the emergency generator is internally provided with a front bearing, a rear end cover is internally provided with a rear bearing, the front bearing is respectively provided with an oil inlet and an oil outlet of lubricating oil, and a circulating cooling system of the lubricating oil and a circulating cooling system are connected between the oil inlet and the oil outlet and drive the bearing lubricating oil to circularly cool through a driving motor; a rear bearing lubricating oil driving system which is the same as the front bearing lubricating oil driving system is also arranged on the rear bearing, and the front circulating cooling system and the rear circulating cooling system are respectively and independently arranged; the existing circulating cooling system for bearing lubricating oil has the following defects: (1) The circulating cooling function of the bearing lubricating oil can be completed only by supplying power to the lubricating oil driving motor by a standby power supply; (2) The arrangement of the circulating cooling systems of the two bearing lubricating oil respectively also increases the occupied space of the equipment and increases the maintenance cost of the system.

In a forced lubricating system of bearing lubricating oil, the liquid level of the lubricating oil in a bearing is required to be kept at a certain liquid level height, the bearing is burnt and damaged due to too low liquid level of the lubricating oil in the bearing, and the bearing leaks oil due to too high liquid level of the lubricating oil; therefore, a bearing lubricating oil liquid level observation window is generally arranged on the bearing, and the liquid level of the bearing lubricating oil is observed through the observation window so as to keep the normal operation of the bearing; the sizes of the front bearing and the rear bearing of the existing emergency generator are different, so that the heights of working liquid levels required by lubricating oil in the two bearings are obviously different; an oil inlet of bearing lubricating oil is generally arranged above a bearing, an oil return port is arranged at the lower end of the bearing, a motor of a lubricating oil driving system pumps the lubricating oil in the bearing back from the oil return port through a driving pump, the cooled lubricating oil is pumped into the bearing through the oil inlet, and the lubricating oil in the bearing returns to the pump from the oil return port by means of gravitational potential energy of self weight, so that the circulation of the lubricating oil is completed; if the lubricating oil systems of the front bearing and the rear bearing are combined together, the purposes of simplifying lubricating system equipment and reducing the occupied space of the lubricating system equipment can be achieved, however, the sizes of the front bearing and the rear bearing are different, the space in the bearing chambers of the front bearing and the rear bearing are obviously different, so that the total volume and the weight of the lubricating oil in the front bearing and the rear bearing are obviously different, the oil return speed of the lubricating oil in the larger bearing in the front bearing and the rear bearing is higher than the oil return speed of the smaller bearing because the oil return of the lubricating oil is carried out by means of gravitational potential energy, the liquid level of the lubricating oil in the large bearing is directly lower than the normal working liquid level of the large bearing when working, manual intervention and manual adjustment are required frequently carried out, and the problem is solved.

The temperature of the lubricating oil in the bearing can be rapidly increased in the working process of the emergency motor bearing, and the lubricating oil needs to be cooled; the existing cooling method is that the returned lubricating oil is introduced into an air cooling system arranged outside a motor to be cooled, and then the cooled lubricating oil is circularly returned to a bearing; the fan of the external air cooling system also depends on the driving motor to drive the fan to complete the cooling task, so that the existing bearing lubricating oil circulating cooling system needs to be provided with an air cooling system of lubricating oil, and the air cooling system needs to occupy larger space.

Disclosure of Invention

The invention provides a shared self-driven lubricating and cooling system for two bearings of an emergency diesel generator, which solves the technical problems of realizing self-circulation cooling of lubricating oil in the bearings of the emergency generator without power supply and greatly reducing the occupied space of corollary equipment.

The invention solves the technical problems by the following technical scheme:

the general concept of the invention is: firstly, the traditional technical means that the lubricating oil is driven by a motor to complete circulating cooling is abandoned, the lubricating oil is driven by a gear pump, the gear pump is skillfully integrated at the non-driving end of the generator, and the self-driven circulation of the lubricating oil in a motor bearing along with the rotation of a rotating shaft of the generator is realized; secondly, an air cooling system in the generator is fully utilized, the circulating lubricating oil cooler is hung on an air inlet window of the motor, and cooling air of the motor is utilized to cool lubricating oil; finally, the lubricating oil cooling systems of the front bearing and the rear bearing are combined into a whole, the lubricating oil supply pipes of the two bearings are subjected to reducing treatment to solve the problem that the lubricating oil in the two bearings has different oil return speeds due to different gravitational potential energies of the self weights, and the lubricating oil in the two bearings can be kept at the working oil level after the circulating system is shared.

A common self-driven lubricating and cooling system for two bearings of an emergency diesel generator comprises a generator base, wherein a motor driving end cover is arranged at the left end of the generator base, a motor non-driving end cover is arranged at the right end of the generator base, a generator excitation frame group shell is arranged at the top end of the generator base, a driving end bearing is arranged on the motor driving end cover, a driving end bearing oil inlet and a driving end bearing oil return port are arranged on the driving end bearing, a non-driving end bearing is arranged on the motor non-driving end cover, a non-driving end bearing oil inlet and a non-driving end bearing oil return port are arranged on the non-driving end bearing, and a generator rotating shaft is arranged between the driving end bearing and the non-driving end bearing; a motor cooling air front side air inlet window and a motor cooling air rear side air inlet window are respectively arranged on the right side vertical surface of the generator excitation frame group shell; the non-drive end lubricating oil air cooler is hung on an air inlet window at the rear side of cooling air of a motor, the other end of the non-drive end lubricating oil air cooler is communicated with an oil inlet of a non-drive end lubricating oil air cooler, the oil outlet of the non-drive end lubricating oil air cooler is communicated with an oil inlet of a non-drive end bearing through the oil outlet pipe of the non-drive end lubricating oil air cooler, and an oil return port of the non-drive end bearing is communicated with the lubricating oil tank through a non-drive end oil return pipe; the motor cooling air front side air inlet window is hung with a drive end lubricating oil air cooler, the other end of an oil inlet pipe of the drive end lubricating oil air cooler is communicated with an oil inlet of the drive end lubricating oil air cooler, an oil outlet pipe of the drive end lubricating oil air cooler is connected to an oil outlet of the drive end lubricating oil air cooler, the other end of the oil outlet pipe of the drive end lubricating oil air cooler is communicated with an oil inlet of a drive end bearing, a drive end oil return pipe is connected to an oil return port of the drive end bearing, and the drive end oil return pipe is communicated with a lubricating oil tank.

The end of the non-driving shaft is fixedly connected with a shaft end flange plate, elastic pin inserting holes are arranged on an excircle of a right vertical surface of the shaft end flange plate at equal intervals in a radian manner, a gear pump driving flange plate is connected to an input shaft of a gear pump, connecting pins are arranged on the gear pump driving flange plate at equal intervals in a radian manner, the left part of each connecting pin is inserted into the corresponding elastic pin inserting hole, and an elastic pin sleeve is sleeved on the left part of each connecting pin; the diameter of the oil outlet pipe of the non-driving-end lubricating oil air cooler is smaller than that of the oil outlet pipe of the driving-end lubricating oil air cooler.

A motor internal cooling fan is arranged on the generator rotating shaft on the right side of the drive end bearing; a motor cooling air outlet window is arranged at the left end of the front side surface of the generator base, and a motor cooling air inlet window is arranged at the right end of the front side surface of the generator base; a cooling air path is arranged in the generator; and an air inlet from the frame shell to the inside of the generator is formed in the bottom end of the generator excitation frame group shell.

A common self-driven lubrication cooling arrangement method for two bearings of an emergency diesel generator comprises a generator base, a gear pump, a lubricating oil air cooler and a lubricating oil tank, wherein a motor drive end cover is arranged at the left end of the generator base, a motor non-drive end cover is arranged at the right end of the generator base, a generator excitation frame group shell is arranged at the top end of the generator base, a drive end bearing is arranged on the motor drive end cover, a drive end bearing oil inlet and a drive end bearing oil return port are arranged on the drive end bearing, a non-drive end bearing is arranged on the motor non-drive end cover, a non-drive end bearing oil inlet and a non-drive end bearing oil return port are arranged on the non-drive end bearing, a generator rotating shaft is arranged between the drive end bearing and the non-drive end bearing, a cooling air path is arranged in the generator, the gear pump is integrated on the non-drive end of the generator, and self-driven circulation of lubricating oil in the motor bearing along with the rotation of the generator rotating shaft is realized; the air cooling system in the generator is fully utilized, the circulating lubricating oil cooler is hung on the air inlet window of the motor, and the cooling air of the motor is utilized to cool the lubricating oil; the lubricating oil cooling systems of the front bearing and the rear bearing are combined into a whole, the reducing treatment is carried out on the lubricating oil supply pipes of the two bearings so as to solve the problem that the oil return speeds of the lubricating oil in the two bearings are different due to different gravitational potential energies of the lubricating oil under the dead weight, and the lubricating oil in the two bearings can be kept at the working oil level after the two bearings share the lubricating oil circulating system.

A common self-driven lubrication cooling layout method for two bearings of an emergency diesel generator is characterized by comprising the following steps:

firstly, respectively arranging a motor cooling air front side air inlet window and a motor cooling air rear side air inlet window on a right side vertical surface of a generator excitation frame group shell, and arranging an air inlet from the frame shell to the interior of a generator at the bottom end of the generator excitation frame group shell;

secondly, connecting the gear pump to the non-driving shaft end of the rotating shaft of the generator; a non-drive end lubricating oil air cooler is connected to the air inlet window on the rear side of the motor cooling air in a hanging mode, and a drive end lubricating oil air cooler is connected to the air inlet window on the front side of the motor cooling air in a hanging mode;

thirdly, an oil inlet of the gear pump is connected with an oil inlet pipe of the gear pump, the other end of the oil inlet pipe of the gear pump is connected with a lubricating oil tank through an oil outlet of the oil tank, and an oil outlet of the gear pump is connected with an oil outlet pipe of the gear pump;

fourthly, connecting a non-drive end lubricating oil air cooler oil inlet pipe and a drive end lubricating oil air cooler oil inlet pipe in parallel on the gear pump oil outlet pipe;

fifthly, the other end of an oil inlet pipe of the non-drive-end lubricating oil air cooler is communicated with an oil inlet of the non-drive-end lubricating oil air cooler, an oil outlet of the non-drive-end lubricating oil air cooler is communicated with an oil inlet of a non-drive-end bearing through an oil outlet pipe of the non-drive-end lubricating oil air cooler, and an oil return port of the non-drive-end bearing is communicated with a lubricating oil tank through a non-drive-end oil return pipe; the other end of an oil inlet pipe of the drive-end lubricating oil air cooler is communicated with an oil inlet of the drive-end lubricating oil air cooler, an oil outlet pipe of the drive-end lubricating oil air cooler is connected to an oil outlet of the drive-end lubricating oil air cooler, the other end of the oil outlet pipe of the drive-end lubricating oil air cooler is communicated with an oil inlet of a drive-end bearing, and a drive-end oil return pipe is connected to an oil return port of the drive-end bearing and communicated with a lubricating oil tank;

when the generator rotates under the drive of the diesel engine, the rotating shaft of the generator drives the gear pump to work, and the circulating cooling of lubricating oil in the two bearings of the generator is realized.

The lubricating oil conveying and distributing proportion of the non-driving-end lubricating oil air cooler oil inlet pipe and the driving-end lubricating oil air cooler oil inlet pipe which are connected in parallel on the gear pump oil outlet pipe is determined on the premise that the lubricating oil level of the lubricating oil in the non-driving-end bearing is kept at the working oil level according to the oil return speed of the lubricating oil in the non-driving-end bearing by means of gravitational potential energy of self weight and the oil return speed of the lubricating oil in the driving-end bearing by means of the gravitational potential energy of self weight.

The self-lubricating device does not need an external power supply or a self-lubricating device driven by a motor to realize bearing self-lubrication, and solves the technical problem of how to ensure self-lubrication of the generator after the power system loses a normal power supply; the lubricating pump is driven by the main shaft of the generator, so that lubricating oil circulates outside, the lubricating oil cooler is placed at the air inlet of the motor, and cooling air of the motor is utilized to cool lubricating oil in the cooler, so that self-lubricating of a motor bearing is realized.

Drawings

Fig. 1 is a schematic perspective view of a generator of the present invention in a right front direction;

FIG. 2 is a schematic perspective view of the generator of the present invention in a left front direction;

FIG. 3 is a schematic view of the structure of the generator of the present invention in a front view;

FIG. 4 is a schematic view of the generator of the present invention in a right view;

FIG. 5 is a schematic view of a cooling air path in the motor of the present invention;

fig. 6 is a diagram of the connection between the gear pump 5 of the present invention and the non-drive shaft end 26.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

a common self-driven lubricating and cooling system for two bearings of an emergency diesel generator comprises a generator base 1, wherein a motor driving end cover 3 is arranged at the left end of the generator base 1, a motor non-driving end cover 2 is arranged at the right end of the generator base 1, a generator excitation frame group shell 10 is arranged at the top end of the generator base 1, a driving end bearing 21 is arranged on the motor driving end cover 3, a driving end bearing oil inlet 22 and a driving end bearing oil return port 23 are arranged on the driving end bearing 21, a non-driving end bearing 4 is arranged on the motor non-driving end cover 2, a non-driving end bearing oil inlet and a non-driving end bearing oil return port are arranged on the non-driving end bearing 4, and a generator rotating shaft is arranged between the driving end bearing 21 and the non-driving end bearing 4; a front side air inlet window 12 of motor cooling air and a rear side air inlet window 11 of the motor cooling air are respectively arranged on the right side vertical surface of the generator excitation frame group shell 10, and the two air inlet windows are newly arranged on the right side vertical surface of the original generator excitation frame group shell 10; a gear pump 5 is connected to a non-driving shaft end 26 of a generator rotating shaft, a gear pump oil inlet pipe 6 is connected to an oil inlet of the gear pump 5, the other end of the gear pump oil inlet pipe 6 is connected to a lubricating oil tank 7 through an oil tank oil outlet 8, a gear pump oil outlet pipe 9 is connected to an oil outlet of the gear pump 5, a non-driving-end lubricating oil air cooler oil inlet pipe 14 and a driving-end lubricating oil air cooler oil inlet pipe 18 are connected to the gear pump oil outlet pipe 9 in parallel, a non-driving-end lubricating oil air cooler 13 is hung on an air inlet window 11 on the rear side of cooling air of a motor, the other end of the non-driving-end lubricating oil air cooler oil inlet pipe 14 is communicated with an oil inlet of the non-driving-end lubricating oil air cooler 13, an oil outlet of the non-driving-end lubricating oil air cooler 13 is communicated with a non-driving-end bearing oil inlet through a non-driving-lubricating oil air cooler oil outlet pipe 15, and a non-driving-end bearing oil return port is communicated with the lubricating oil tank 7 through a non-driving-oil return pipe 16; a drive end lubricating oil air cooler 17 is hung on the air inlet window 12 on the front side of the motor cooling air, the other end of an oil inlet pipe 18 of the drive end lubricating oil air cooler is communicated with an oil inlet of the drive end lubricating oil air cooler 17, an oil outlet of the drive end lubricating oil air cooler 17 is connected with a drive end lubricating oil air cooler oil outlet pipe 19, the other end of the drive end lubricating oil air cooler oil outlet pipe 19 is communicated with a drive end bearing oil inlet 22, a drive end oil return pipe 20 is connected with a drive end oil return port 23, and the drive end oil return pipe 20 is communicated with a lubricating oil tank 7; when the motor rotating shaft of the emergency generator is dragged by the diesel engine to rotate, the input shaft 30 of the gear pump 5 connected with the motor rotating shaft also rotates to pump lubricating oil in the lubricating oil tank 7 into the two motor bearings, and therefore self-driving of the lubricating oil along with the rotation of the motor rotating shaft is achieved.

An axial end flange plate 33 is fixedly connected to the non-driving axial end 26, elastic pin inserting holes 34 are arranged on the excircle of the right vertical surface of the axial end flange plate 33 at equal intervals in a radian manner, a gear pump driving flange plate 31 is connected to the input shaft 30 of the gear pump 5, connecting pins 32 are arranged on the gear pump driving flange plate 31 at equal intervals in a radian manner, the left parts of the connecting pins 32 are inserted into the elastic pin inserting holes 34, and elastic pin sleeves 35 are sleeved on the left parts of the connecting pins 32; because the gear pump 5 realizes the pumping of lubricating oil by the meshing of gears, the input shaft 30 of the gear pump 5 has strict limitation on the axial and radial displacement, and the gear pump can be damaged by large pulsation in the axial and radial directions; however, when the rotating shaft of the diesel generator is started and works, larger axial float can occur, particularly radial movement can occur after the bearing runs and generates heat, the problem of axial float of the generator motor shaft is solved by the movable matching of the connecting pins 32 arranged on the gear pump driving flange 31 at equal intervals in radian and the elastic pin inserting holes 34 arranged on the excircle of the right vertical surface of the shaft end flange 33 at equal intervals in radian, the axial float is converted into the relative movement of the elastic pin inserting holes 34 and the connecting pins 32, the position of the connecting pins 32 is ensured to be unchanged, and the input shaft 30 of the gear pump 5 is ensured to be unchanged in the axial position; the outer diameter of the connecting pin 32 is smaller than the aperture of the elastic pin inserting hole 34, and an elastic pin sleeve 35 is arranged between the connecting pin and the elastic pin sleeve, so that the radial runout of the rotating shaft of the motor is absorbed by the elastic pin sleeve 35, and the input shaft 30 of the gear pump 5 is ensured to be unchanged in the radial position; the invention relates to an emergency generator, which is characterized in that the size of a drive end bearing of the emergency generator is larger than that of a non-drive end bearing, so that the space of a drive end bearing chamber is larger than that of a non-drive end bearing, namely the volume of lubricating oil in the drive bearing during normal operation is larger than that of the lubricating oil in the non-drive end bearing, but the return oil of the lubricating oil in the bearing chamber is returned by means of gravitational potential energy, the return oil speed of the lubricating oil in the drive end bearing chamber with larger gravitational potential energy is larger than that of the lubricating oil in the non-drive end bearing chamber, after the lubricating oil of the two bearings is integrally designed, how to increase the unit oil supply quantity of the lubricating oil in the drive end bearing chamber to ensure that the oil level of the lubricating oil in the two bearing chambers is kept on the designed working oil level is realized.

An in-motor cooling fan 27 is arranged on the generator rotating shaft on the right side of the driving end bearing 21; a motor cooling air outlet window 24 is arranged at the left end of the front side surface of the generator base 1, and a motor cooling air inlet window 25 is arranged at the right end of the front side surface of the generator base 1; a cooling air passage 28 is provided in the generator; an air inlet 29 from the frame shell to the inside of the generator is arranged at the bottom end of the generator excitation frame group shell 10; because the internal air cooling of the emergency generator depends on the rotation of an internal cooling fan 27 arranged on a motor shaft of a motor driving end along with the rotation of a motor rotating shaft, negative pressure is generated in the motor, and cold air outside the motor is sucked by the negative pressure, firstly, the cold air enters the generator excitation frame group shell 10 through the rear side air inlet window 11 of the motor cooling air and the front side air inlet window 12 of the motor cooling air, the two lubricating oil air coolers are hung on the windows, the lubricating oil in the two lubricating oil air coolers is firstly cooled by the cooling air, then, the cooling air enters the generator excitation frame group shell 10, then enters the non-driving end side of the motor from the frame shell to an air inlet 29 in the generator, then enters the motor driving end side through a cooling air path 28 arranged in the generator, and finally, the cold air is blown out from the motor cooling air outlet window 24.

A common self-driven lubrication cooling arrangement method for two bearings of an emergency diesel generator comprises a generator base 1, a gear pump 5, a lubricating oil air cooler and a lubricating oil tank 7, wherein a motor driving end cover 3 is arranged at the left end of the generator base 1, a motor non-driving end cover 2 is arranged at the right end of the generator base 1, a generator excitation frame group shell 10 is arranged at the top end of the generator base 1, a driving end bearing 21 is arranged on the motor driving end cover 3, a driving end bearing oil inlet 22 and a driving end bearing oil return port 23 are arranged on the driving end bearing 21, a non-driving end bearing 4 is arranged on the motor non-driving end cover 2, a non-driving end bearing oil inlet and a non-driving end bearing oil return port are arranged on the non-driving end bearing 4, a generator rotating shaft is arranged between the driving end bearing 21 and the non-driving end bearing 4, a cooling air path 28 is arranged in the generator, the gear pump is integrated on the non-driving end of the generator, and self-driven circulation of the lubricating oil in the motor bearing along with the rotation of the generator rotating shaft is realized; the air cooling system in the generator is fully utilized, the circulating lubricating oil cooler is hung on the air inlet window of the motor, and the cooling air of the motor is utilized to cool the lubricating oil; the lubricating oil cooling systems of the front bearing and the rear bearing are combined into a whole, the reducing treatment is carried out on the lubricating oil supply pipes of the two bearings so as to solve the problem that the oil return speeds of the lubricating oil in the two bearings are different due to different gravitational potential energies of the lubricating oil under the dead weight, and the lubricating oil in the two bearings can be kept at the working oil level after the two bearings share the lubricating oil circulating system.

A common self-driven lubrication cooling layout method for two bearings of an emergency diesel generator is characterized by comprising the following steps:

firstly, respectively arranging a motor cooling air front side air inlet window 12 and a motor cooling air rear side air inlet window 11 on the right side vertical surface of a generator excitation frame group shell 10, and arranging an air inlet 29 from the frame shell to the interior of a generator at the bottom end of the generator excitation frame group shell 10;

secondly, connecting the gear pump 5 to a non-driving shaft end 26 of a rotating shaft of the generator; a non-drive end lubricating oil air cooler 13 is hung on the rear side air inlet window 11 of the motor cooling air, and a drive end lubricating oil air cooler 17 is hung on the front side air inlet window 12 of the motor cooling air;

thirdly, an oil inlet of the gear pump 5 is connected with a gear pump oil inlet pipe 6, the other end of the gear pump oil inlet pipe 6 is connected with a lubricating oil tank 7 through an oil tank oil outlet 8, and an oil outlet of the gear pump 5 is connected with a gear pump oil outlet pipe 9;

fourthly, connecting a non-drive end lubricating oil air cooler oil inlet pipe 14 and a drive end lubricating oil air cooler oil inlet pipe 18 in parallel on the gear pump oil outlet pipe 9;

fifthly, the other end of the oil inlet pipe 14 of the non-drive-end lubricating oil air cooler is communicated with an oil inlet of the non-drive-end lubricating oil air cooler 13, an oil outlet of the non-drive-end lubricating oil air cooler 13 is communicated with an oil inlet of a non-drive-end bearing through an oil outlet pipe 15 of the non-drive-end lubricating oil air cooler, and an oil return port of the non-drive-end bearing is communicated with a lubricating oil tank 7 through a non-drive-end oil return pipe 16; the other end of the oil inlet pipe 18 of the driving-end lubricating oil air cooler is communicated with the oil inlet of the driving-end lubricating oil air cooler 17, the oil outlet of the driving-end lubricating oil air cooler 17 is connected with an oil outlet pipe 19 of the driving-end lubricating oil air cooler, the other end of the oil outlet pipe 19 of the driving-end lubricating oil air cooler is communicated with a bearing oil inlet 22 of the driving end, and a driving-end oil return pipe 20 is connected to an oil return port 23 of the bearing of the driving end and communicated with a lubricating oil tank 7;

when the generator rotates under the drive of the diesel engine, the rotating shaft of the generator drives the gear pump 5 to work, and the circulating cooling of lubricating oil in two bearings of the generator is realized.

The proportion of the transmission and distribution of the lubricating oil between the non-drive-end lubricating oil air cooler oil inlet pipe 14 and the drive-end lubricating oil air cooler oil inlet pipe 18 connected in parallel to the gear pump oil outlet pipe 9 is determined on the premise that the lubricating oil level of the lubricating oil in the non-drive-end bearing 4 is kept at the working oil level by the oil return speed of the gravitational potential energy of the self weight and the lubricating oil level of the lubricating oil in the drive-end bearing 21 is kept at the working oil level by the oil return speed of the gravitational potential energy of the self weight.

Claims (3)

1. A shared self-driven lubricating and cooling system for two bearings of an emergency diesel generator comprises a generator base (1), wherein a motor driving end cover (3) is arranged at the left end of the generator base (1), a motor non-driving end cover (2) is arranged at the right end of the generator base (1), a generator excitation frame group shell (10) is arranged at the top end of the generator base (1), a driving end bearing (21) is arranged on the motor driving end cover (3), a driving end bearing oil inlet (22) and a driving end bearing oil return port (23) are arranged on the driving end bearing (21), a non-driving end bearing (4) is arranged on the motor non-driving end cover (2), a non-driving end bearing oil inlet and a non-driving end bearing oil return port are arranged on the non-driving end bearing (4), and a generator rotating shaft is arranged between the driving end bearing (21) and the non-driving end bearing (4); a motor cooling air front side air inlet window (12) and a motor cooling air rear side air inlet window (11) are respectively arranged on the right side vertical surface of the generator excitation frame group shell (10); the generator is characterized in that a gear pump (5) is connected to a non-driving shaft end (26) of a generator rotating shaft, a gear pump oil inlet pipe (6) is connected to an oil inlet of the gear pump (5), the other end of the gear pump oil inlet pipe (6) is connected to a lubricating oil tank (7) through an oil tank oil outlet (8), a gear pump oil outlet pipe (9) is connected to an oil outlet of the gear pump (5), a non-driving-end lubricating oil air cooler oil inlet pipe (14) and a driving-end lubricating oil air cooler oil inlet pipe (18) are connected to the gear pump oil outlet pipe (9) in parallel, a non-driving-end lubricating oil air cooler (13) is hung on a motor cooling air rear side air inlet window (11), the other end of the non-driving-end lubricating oil air cooler oil inlet pipe (14) is communicated with an oil inlet of the non-driving-end lubricating oil air cooler (13), the oil outlet of the non-driving-end lubricating oil air cooler (13) is communicated with a non-driving-end bearing oil inlet through a non-lubricating oil air cooler oil outlet pipe (15), and a non-oil return port is communicated with the lubricating oil tank (7) through a non-oil return pipe (16) to the driving end bearing; hang on motor cooling wind front side air inlet window (12) and connect drive end lubricating oil air cooler (17), the other end that drive end lubricating oil air cooler advances oil pipe (18) communicates together with the oil inlet of drive end lubricating oil air cooler (17), be connected with drive end lubricating oil air cooler oil pipe (19) on the oil-out of drive end lubricating oil air cooler (17), the other end that drive end lubricating oil air cooler goes out oil pipe (19) communicates together with drive end bearing oil inlet (22), be connected with drive end oil pipe (20) back on drive end bearing oil return opening (23), drive end oil pipe (20) and lubricating oil tank (7) communicate together.

2. The shared self-driven lubricating and cooling system for the two bearings of the emergency diesel generator is characterized in that a shaft end flange (33) is fixedly connected to a non-driving shaft end (26), elastic pin inserting holes (34) are formed in the excircle of the right vertical surface of the shaft end flange (33) at equal intervals in a radian mode, a gear pump driving flange (31) is connected to an input shaft (30) of the gear pump (5), connecting pins (32) are arranged in the gear pump driving flange (31) at equal intervals in a radian mode, the left portion of each connecting pin (32) is inserted into the corresponding elastic pin inserting hole (34), and an elastic pin sleeve (35) is sleeved on the left portion of each connecting pin (32); the diameter of the oil outlet pipe (15) of the non-driving-end lubricating oil air cooler is smaller than that of the oil outlet pipe (19) of the driving-end lubricating oil air cooler.

3. The common self-driven lubricating and cooling system for two bearings of the emergency diesel generator according to claim 1 or 2, characterized in that an in-motor cooling fan (27) is arranged on the generator rotating shaft at the right side of the drive end bearing (21); a motor cooling air outlet window (24) is arranged at the left end of the front side surface of the generator base (1), and a motor cooling air inlet window (25) is arranged at the right end of the front side surface of the generator base (1); a cooling air passage (28) is arranged in the generator; an air inlet (29) from the frame shell to the inside of the generator is arranged at the bottom end of the generator excitation frame group shell (10).

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