External oil pump system of unit

Abstract

The utility model relates to an external oil pump system of a unit, which comprises a main oil tank, at least two external oil pumps sequentially communicated with an oil outlet of the main oil tank, the unit respectively communicated with the external oil pumps through a main pipeline, and a high-level oil tank system for providing lubricating oil for the unit during power sag, a first oil inlet of the unit and a second oil inlet of the high-level oil tank system are both communicated with the external oil pump, and a first oil return opening of the unit and a second oil return opening of the high-level oil tank system are both communicated with the main oil tank. The oil pump is externally arranged on the outer side of the unit, parameters such as vibration, temperature, sound and oil pressure of the oil pump can be conveniently inspected and diagnosed, and when the unit and the external oil pump are powered off for a short time due to power sag of a factory, lubricating oil is provided for the unit through the high-level oil tank system, so that the unit can be fully lubricated.

Description

Technical Field

[0001] The utility model belongs to the technical field of installation of an integral oil pump unit, and particularly relates to an external oil pump system for a unit. Background Art

[0002] In petrochemical plants and other factories, there are various medium and large units that provide materials, power or electricity to the equipment, such as fans, steam turbines, compressors, generators and large water pumps. Due to their high power, these units are all equipped with a lubricating oil system as standard, which is an oil pump that provides lubricating oil to the lubricating oil system of the unit. In one solution known to the inventor, the oil pump is arranged on the main engine rotor to form a shaft head oil pump directly driven by the main engine rotor, or the oil pump is connected to the main shaft rotor through a speed increase and reduction gear to form an oil pump driven by a variable speed. The above two types of oil pumps are both called built-in main oil pumps. Since such built-in main oil pumps are arranged inside the unit, they cannot be inspected and observed at all times. Once the built-in main oil pump fails, it will cause the unit to shut down, and then cause the factory to stop production, which will cause large economic losses. Moreover, when the factory loses power, the built-in main oil pump will rotate with the inertia of the main shaft rotor to provide a certain amount of lubricating oil to the unit, but its oil pressure cannot be guaranteed, resulting in incomplete lubrication of the unit when the factory loses power.

[0003] Therefore, in response to the above technical problems, it is necessary to improve the oil pump system of the unit. On the basis of ensuring that the vibration, temperature, sound, oil pressure and other parameters of the running oil pump of the oil supply can be inspected and diagnosed, it is a technical problem that technical personnel in this field need to solve to ensure that the unit can be fully lubricated when the factory power is shaken. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an external oil pump system for the unit, which ensures that the vibration, temperature, sound, oil pressure and other parameters of the running oil pump of the oil supply can be inspected and diagnosed, so that the unit can be fully lubricated when the factory power is shaken.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] A unit external oil pump system includes a main oil tank, at least two external oil pumps connected in sequence to the oil outlet of the main oil tank, and a unit connected to the external oil pumps through a main pipeline and a high-level oil tank system for providing lubricating oil to the unit when the power is shaken. The first oil inlet of the unit and the second oil inlet of the high-level oil tank system are both connected to the external oil pumps, and the first oil return port of the unit and the second oil return port of the high-level oil tank are both connected to the main oil tank.

[0007] Preferably, the high-position oil tank system includes a high-position oil tank, a check valve, a first stop valve and a three-valve system sequentially arranged on a pipeline connecting the high-position oil tank and the external oil pump;

[0008] The three-valve system includes three parallel-connected pipelines, and a second stop valve, a check valve, and a throttling orifice plate respectively arranged on the three parallel pipelines;

[0009] The bottom end of the high-position oil tank is higher than the unit, and the check valve is arranged on the main pipe.

[0010] Preferably, the height difference between the bottom end of the high-position oil tank and the unit is 8-10 meters.

[0011] Preferably, the second oil return port is provided at the top of the high-position oil tank, and the second oil return port is connected to the main oil tank through an oil return sight glass.

[0012] Preferably, the bottom end of the high-level oil tank is connected to the second shut-off valve, the check valve and the throttle orifice plate respectively.

[0013] Preferably, a cooler and a filter are sequentially provided on the main pipe.

[0014] Preferably, the main oil tank is further provided with a circulation outlet and a circulation inlet, and the circulation outlet is connected to the circulation inlet through the auxiliary oil tank and the oil pouring gear pump in sequence.

[0015] Preferably, the circulation inlet is arranged at the top of the main oil tank, and the circulation outlet is arranged at a position on the side wall of the main oil tank close to the top.

[0016] Preferably, a third shut-off valve is provided between the main oil tank and the external oil pump, and a fourth shut-off valve is provided between the auxiliary oil tank and the oil return gear pump.

[0017] Preferably, the external oil pump includes a first external oil pump and a second external oil pump.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] By placing the oil pump outside the unit, it is convenient to inspect and diagnose the vibration, temperature, sound, oil pressure and other parameters of the oil pump. When the factory loses power, the unit and the external oil pump are temporarily powered off. Since the external oil pump cannot provide lubricating oil for the unit, a high-level oil tank system is set up to provide lubricating oil for the unit so that the unit can be fully lubricated. This can effectively avoid the problem of not being able to inspect the oil pump in real time when the oil pump is set on the unit's main shaft rotor. It can also prevent the oil pump from being set on the unit's main shaft rotor, and only providing oil pressure to the unit when the unit's main shaft rotor rotates by inertia, which makes the unit unable to be fully lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Attachment Figure 1 This is a schematic diagram of the overall structure of the external oil pump system of the unit disclosed in the embodiment of the utility model;

[0022] Among them, 1. Main oil tank; 2. Unit; 4. Filter; 5. Cooler; 6. Auxiliary oil tank; 7. High-level oil tank; 8. Throttle orifice; 9. Check valve; 10. Second stop valve; 11. Oil return sight glass; 12. Oil return gear pump; 13. External oil pump; 14. Check valve; 15. First stop valve; 16. Third stop valve; 17. Fourth stop valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the utility model is to provide an external oil pump system for the unit, which can ensure that the vibration, temperature, sound, oil pressure and other parameters of the oil supply running pump can be inspected and diagnosed, so that the unit can be fully lubricated when the factory power is shaken.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] refer to Figure 1The external oil pump system of the unit disclosed in the embodiment of the present invention comprises at least a main oil tank 1, the oil outlet of the main oil tank 1 is connected in sequence to at least two external oil pumps 13, and the at least two external oil pumps 13 are connected in parallel through pipelines. After the external oil pumps 13 are connected in parallel, they are respectively connected to the unit 2 and the high-level oil tank system through the main pipeline. When the power of the factory is shaken, the high-level oil tank system provides lubricating oil for the unit 2, the first oil inlet of the unit 2 is connected to the external oil pump 13, the first oil return port of the unit 2 is connected to the main oil tank 1, the second oil inlet of the high-level oil tank system is connected to the external oil pump 13, and the second oil return port of the high-level oil tank system is connected to the main oil tank 1. The oil tank 1 is connected, and by placing the oil pump outside the unit 2, it is convenient to inspect and diagnose the vibration, temperature, sound, oil pressure and other parameters of the oil pump. When the power in the factory is shaken, the unit 2 and the external oil pump 13 are temporarily powered off, and lubricating oil is provided to the unit 2 through the high-level oil tank system, so that the unit 2 can be fully lubricated. This can effectively avoid the problem of not being able to inspect the oil pump in real time when the oil pump is set on the main shaft rotor of the unit 2. It can also prevent the problem of not being able to fully lubricate the unit 2 when the oil pump is set on the main shaft rotor of the unit 2 and only providing oil pressure to the unit 2 when the main shaft rotor of the unit 2 rotates due to inertia.

[0027] It should be noted that any one of the at least two external oil pumps 13 connected in parallel can be in operation. The non-operating external oil pump 13 is the standby pump. When the oil pressure of the operating external oil pump 13 is lower than a certain set value, the standby pump interlock automatically starts to make at least two external oil pumps 13 operate together. When the oil pressure is higher than a certain set value, one of them can be manually stopped. When the electrical signal of the operating pump is detected to be lost, the standby pump interlock automatically starts to supply oil.

[0028] refer to Figure 1 As an embodiment, the high-level oil tank system includes a high-level oil tank 7, a check valve 14, a first stop valve 15, and a three-valve system arranged in sequence on the pipeline connecting the high-level oil tank 7 and the external oil pump 13. The three-valve system includes three parallel-connected pipelines, each of which is respectively provided with a second stop valve 10, a check valve 9, and a throttle orifice plate 8. The bottom of the high-level oil tank 7 is higher than the unit 2, and the check valve 14 is arranged on the main pipeline.

[0029] In this embodiment, when the unit 2 is operating normally, the lubricating oil in the oil tank is transported to the main pipeline through the external oil pump 13, and is divided into two paths after passing through the check valve 14 on the main pipeline. One path enters the first oil inlet of the unit 2 to provide lubricating oil for the unit 2, and flows back to the oil tank through the first oil return port of the unit 2. The other path enters the three-valve system through the first stop valve 15. The check valve 9 in the three-valve system is in a closed state under the action of oil pressure. The second stop valve 10 in the three-valve system is opened, and the lubricating oil enters the high-level oil tank 7 through the second stop valve 10 and the throttling orifice 8. When the high-level oil tank 7 is full of lubricating oil, the second stop valve 10 is closed, so that the lubricating oil passes through the throttling orifice 8 to the high-level oil tank 7. Lubricating oil is introduced into the oil tank 7, and the high-level oil tank 7 can be quickly filled through the stop valve. After filling, oil is slowly supplied to the high-level oil tank 7 through the throttle orifice 8 to ensure the fluidity of the lubricating oil. When the factory loses power, the unit 2 and the external oil pump 13 will be temporarily powered off. The rotor in the unit 2 will continue to rotate due to inertia, but the external oil pump 13 can no longer provide lubricating oil to the unit 2. At this time, the check valve 9 opens under the action of the oil pressure in the high-level oil tank 7, and the check valve 14 on the main line is closed. At this time, the oil inlet pipeline of the high-level oil tank 7 becomes the oil outlet pipeline, and the lubricating oil in the high-level oil tank 7 flows to the oil inlet of the unit 2 due to the action of gravity, providing lubricating oil to the unit 2 and ensuring the lubrication effect of the unit 2.

[0030] refer to Figure 1 As an implementation method, the height difference between the bottom end of the high-level oil tank 7 and the unit 2 is 8-10 meters. When the factory power is shaken, sufficient oil pressure in the high-level oil tank 7 can be guaranteed.

[0031] refer to Figure 1 As an implementation method, the second oil return port is set at the top of the high-level oil tank 7. The second oil return port is connected to the main oil tank 1 through the oil return sight glass 11. The lubricating oil returns to the main oil tank 1 through the oil return sight glass 11. When the oil reflux is observed in the oil return sight glass 11, the second stop valve 10 is closed, which can more intuitively determine whether the high-level oil tank 7 is full.

[0032] refer to Figure 1 As an implementation method, the bottom end of the high-level oil tank 7 is respectively connected to the second stop valve 10, the check valve 9 and the throttle orifice 8, that is, the connecting ports of the second stop valve 10, the check valve 9 and the throttle orifice 8 are set at the bottom of the high-level oil tank 7 to ensure that there is sufficient oil pressure when the lubricating oil in the high-level oil tank 7 flows back to the unit 2.

[0033] refer to Figure 1 In one embodiment, a cooler 5 and a filter 4 are sequentially provided on the main pipe. The cooler 5 can cool the lubricating oil, and the filter 4 can ensure the cleanliness of the lubricating oil.

[0034] refer to Figure 1In one embodiment, a circulation outlet and a circulation inlet are further provided on the main oil tank 1. The circulation outlet is connected to the circulation inlet through the auxiliary oil tank 6 and the oil return gear pump 12 in sequence. Because the main oil tank 1 is not easy to replace, by providing the auxiliary oil tank 6, when the built-in main oil pump is converted into an external oil pump 13, if the volume of the main oil tank 1 is not enough to receive the return oil from the high-level oil tank 7, it is necessary to add an auxiliary oil tank 6 to receive part of the lubricating oil that the main oil tank 1 cannot receive. After each system restart, after the high-level oil tank 7 is oiled, the lubricating oil in the auxiliary oil tank 6 is pumped to the main oil tank 1 through the oil return gear pump 12, and then the main unit 2 is started to run.

[0035] refer to Figure 1 As an implementation method, the circulation inlet is set at the top of the main oil tank 1, and the circulation outlet is set near the top of the main oil tank 1. When the high-level oil tank 7 is full of oil, the oil overflows from the second oil return port on the top to return to the main oil tank 1. When the main oil tank 1 is full of oil, the oil overflows from the circulation outlet to return to the auxiliary oil tank 6.

[0036] refer to Figure 1 As an embodiment, a third stop valve 16 is provided between the main oil tank 1 and the external oil pump 13, and a fourth stop valve 17 is provided between the auxiliary oil tank 6 and the oil return gear pump 12. By providing the third stop valve 16, the on-off control of the connecting pipeline between the external oil pump 13 and the main oil tank 1 can be facilitated, and by providing the fourth stop valve 17, the on-off control of the connecting pipeline between the auxiliary oil tank 6 and the oil return gear pump 12 can be facilitated.

[0037] refer to Figure 1 As an embodiment, the external oil pump 13 includes a first external oil pump 13 and a second external oil pump 13. By providing two external oil pumps 13, the two oil pumps can be interlocked and controlled.

[0038] It should be noted that the first external oil pump and the second external oil pump are provided with an oil pressure sensor and a temperature sensor to measure the oil pressure and temperature values ​​in the first external oil pump and the second external oil pump. In addition, a control system is also provided. Since the control system is a prior art, it will not be described in detail here. When the first external oil pump works as an operating oil pump, the second external oil pump is a standby pump. The control system sets a minimum oil pressure preset value and a maximum oil pressure preset value for the first external oil pump. When the oil pressure sensor detects that the oil pressure in the first external oil pump is lower than the minimum oil pressure preset value, the control system controls the start of the second external oil pump to ensure the oil pressure in the main line. When the oil pressure of the first external oil pump is higher than the maximum oil pressure preset value, the second external oil pump can be manually shut down. When the control system detects that the electrical signal of the first external oil pump is lost, the second external oil pump is interlocked to start and supply oil. The first external oil pump can also be used as a standby pump, and the corresponding second external oil pump can also be used as an operating pump.

[0039] Adaptive changes based on actual needs are all within the protection scope of this utility model.

[0040] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be considered as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

Claims

1. An external oil pump system for a unit, characterized in that: It includes a main oil tank, at least two external oil pumps connected to the oil outlet of the main oil tank in sequence, and a unit connected to the external oil pumps through the main pipeline and a high-level oil tank system that provides lubricating oil for the unit when the power is shaken. The first oil inlet of the unit and the second oil inlet of the high-level oil tank system are both connected to the external oil pumps, and the first oil return port of the unit and the second oil return port of the high-level oil tank are both connected to the main oil tank.

2. The external oil pump system of the unit according to claim 1, characterized in that: The high-position oil tank system includes a high-position oil tank, a check valve, a first stop valve and a three-valve system arranged in sequence on the pipeline connecting the high-position oil tank and the external oil pump; The three-valve system includes three parallel-connected pipelines, and a second stop valve, a check valve, and a throttling orifice plate respectively arranged on the three parallel pipelines; The bottom end of the high-position oil tank is higher than the unit, and the check valve is arranged on the main pipe.

3. The external oil pump system of the unit according to claim 2, characterized in that: The height difference between the bottom end of the high-position oil tank and the unit is 8-10 meters.

4. The external oil pump system of the unit according to claim 2, characterized in that: The second oil return port is arranged at the top of the high-position oil tank, and the second oil return port is connected to the main oil tank through an oil return sight glass.

5. The external oil pump system of the unit according to claim 2, characterized in that: The bottom end of the high-position oil tank is connected to the second stop valve, the check valve and the throttle orifice plate respectively.

6. The external oil pump system of the unit according to claim 1, characterized in that: The main pipe is also provided with a cooler and a filter in sequence.

7. The external oil pump system of the unit according to claim 1, characterized in that: The main oil tank is also provided with a circulation outlet and a circulation inlet, and the circulation outlet is connected to the circulation inlet through the auxiliary oil tank and the oil pouring gear pump in sequence.

8. The external oil pump system of the unit according to claim 7, characterized in that: The circulation inlet is arranged at the top of the main oil tank, and the circulation outlet is arranged at a position near the top of the side wall of the main oil tank.

9. The external oil pump system of the unit according to claim 7, characterized in that: A third stop valve is provided between the main oil tank and the external oil pump, and a fourth stop valve is provided between the auxiliary oil tank and the oil return gear pump.

10. The external oil pump system of the unit according to claim 1, characterized in that: The external oil pump includes a first external oil pump and a second external oil pump.

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