Lubricating oil pump control device of gas turbine unit

Abstract

The utility model discloses a lubricating oil pump control device of a gas turbine unit, and particularly relates to a lubricating oil pump device. Comprising an oil tank, pipeline assemblies located on the two sides of the oil tank, an oil pump located on one sides of the pipeline assemblies, a filter located on one side of the oil pump, one-way valve assemblies located on the two sides of the oil tank and the filter, and sampling assemblies located on the inner sides of the one-way valve assemblies. And the occurrence of generator bearing bush oil cut-off damage accidents caused by too slow oil pump linkage is effectively avoided. The method is particularly important for a unit participating in black start, the risk of power loss of a PC section of a gas turbine possibly occurs after black start is finished each time, the joint start response time of a direct-current oil pump is very important when the PC section of the gas turbine loses power, and rapid and stable start of the direct-current oil pump is one of necessary conditions for guaranteeing safe shutdown of the gas turbine.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil pumps, in particular to a lubricating oil pump control device for a gas turbine set. Background Art

[0002] During the entire operation of the gas turbine (hereinafter referred to as the gas turbine), the bearings, gearboxes and other rotating parts require lubricating oil with sufficient pressure to achieve the following related functions: 1. Lubrication function. Separate the mechanical friction surfaces to form liquid friction, reduce mechanical wear and friction resistance, and improve mechanical efficiency; 2. Cooling function. Utilize the circulation of engine oil to take away the heat generated during mechanical operation to ensure the normal operation of the machine; 3. Anti-rust function. Lubricating oil adheres to the surface of parts to prevent the surface of parts from contacting with moisture, air and gas to produce oxidation (rust) and corrosion; 4. Sealing function. Utilize the viscosity of lubricating oil to adhere to the surface of moving parts to improve the sealing effect; 5. Purification function. Utilize the circulation of lubricating oil to flush the surface of parts and take away the fine metal chips worn away.

[0003] The existing aeroderivative gas turbine lubrication system was designed and installed by General Electric (GE), a US company with exclusive patents. In this system, when the AC lubrication oil pump for the generator stops operating, the lubrication oil pressure fed back from the gas turbine's oil supply main drops too slowly. This causes a delay in the system's automatic activation of the DC oil pump, delaying the timely buildup of lubrication oil pressure. This leads to abnormal oil supply to the generator bearings and can easily damage the generator bearings. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0006] Therefore, the present invention aims to solve the problem of a generator lubricating oil pump failure or low lubricating oil main pipe pressure, which in turn causes the DC pump to start too slowly.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a lubricating oil pump control device for a gas turbine unit, comprising an oil tank, a pipeline assembly located on both sides of the oil tank, an oil pump located on one side of the pipeline assembly, a filter located on one side of the oil pump, a one-way valve assembly located on both sides of the oil tank and the filter, and a sampling assembly located inside the one-way valve assembly.

[0008] As a preferred solution of the lubricating oil pump control device of a gas turbine unit described in the utility model, wherein: the pipeline assembly includes pipeline 1, the pipeline 1 is fixedly connected to one side of the oil tank, the oil pump is fixedly connected to the end of pipeline 1 away from the oil tank, the end of the oil pump away from pipeline 1 is fixedly connected to pipeline 2, the filter is fixedly connected to the end of pipeline 2 away from the oil pump, the end of the filter away from pipeline 2 is fixedly connected to pipeline 3, the other side of the oil tank is fixedly connected to pipeline 4, and a main pipe is fixedly connected between pipelines 3 and 4.

[0009] As a preferred solution of the lubricating oil pump control device of the gas turbine unit described in the utility model, the pipeline 1, pipeline 2, pipeline 3, pipeline 4 and the main pipe are interconnected.

[0010] As a preferred solution of the lubricating oil pump control device of a gas turbine unit described in the utility model, the one-way valve assembly includes one-way valve 1 and one-way valve 2, the one-way valve 1 is fixedly connected between pipeline 3 and the main pipe, and the one-way valve 2 is fixedly connected between pipeline 4 and the main pipe.

[0011] As a preferred solution of the lubricating oil pump control device of the gas turbine set described in the utility model, a reduction gear box is fixedly connected between the main pipe and the pipeline four.

[0012] As a preferred solution of the lubricating oil pump control device of a gas turbine unit described in the utility model, a sampling assembly is provided on the side of the main pipe surface close to pipeline four, and the sampling assembly includes a sampling port, which is opened on the surface of the main pipe, and a sampling tube is fixedly connected to the outside of the sampling port, and a pressure transmitter is fixedly connected to the end of the sampling tube.

[0013] As a preferred solution of the lubricating oil pump control device of the gas turbine unit described in the utility model, the sampling port is on the side of the main pipe.

[0014] As a preferred solution of the lubricating oil pump control device of the gas turbine unit described in the utility model, the sampling port is above the main pipe.

[0015] As a preferred solution of the lubricating oil pump control device of a gas turbine unit described in the utility model, wherein: pressure switch 1 is fixedly connected to the side of the pressure transmitter, and pressure switch 2 is fixedly connected to the side of the pressure transmitter away from pressure switch 1.

[0016] As a preferred solution of the lubricating oil pump control device of the gas turbine set described in the utility model, the first pressure switch is an on button, and the second pressure switch is a off button.

[0017] The beneficial effects of the present invention are as follows: the device is sealedly connected with the fuel tank, oil pump, one-way valve assembly and filter through the arranged pipeline assembly, so that the engine can flow the fuel inside the fuel tank inside the pipeline assembly according to a determined flow direction, thereby ensuring the normal operation of the engine and the stability of the system, shortening the length, diameter and shape of the sampling tube, and also increasing the problem of low pressure in the pipeline assembly and slow start-up of the DC pump in the event of oil pump failure, thereby avoiding the occurrence of oil shortage and damage to the generator bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of a lubricating oil pump control device for a gas turbine unit according to the present invention;

[0020] Figure 2 This is a schematic top view of the structure of a lubricating oil pump control device for a gas turbine unit according to the present invention;

[0021] Figure 3 The present invention is a system flow chart of a lubricating oil pump control device for a gas turbine unit. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for ease of illustration, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0025] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1

[0027] Reference Figure 1-Figure 3 , which is the first embodiment of the utility model, provides a lubricating oil pump control device for a gas turbine unit, which is sealed by the pipeline component 101 and the oil tank 100, the oil pump 102 and the filter 103, so that the engine can operate normally during use.

[0028] Specifically, it includes an oil tank 100, with pipeline assemblies 101 fixedly connected on both sides of the oil tank 100, an oil pump 102 fixedly connected on one side of the pipeline assembly 101, a filter 103 fixedly connected on one side of the oil pump 102, and a one-way valve assembly 104 fixedly connected on both sides of the oil tank 100 and the filter 103, and a sampling assembly 200 is arranged inside the one-way valve assembly 104.

[0029] Furthermore, the pipeline assembly 101 includes a pipeline 101a, which is fixedly connected to one side of the fuel tank 100. The fuel tank 100 is mainly used to store fuel to ensure that the engine can work continuously. The side of the pipeline 101a away from the fuel tank 100 is fixedly connected to the oil pump 102. The oil pump 102 is used to transport the fuel inside the fuel tank 100 to the inside of the engine at a certain pressure. The end of the oil pump 102 away from the pipeline 101a is fixedly connected to the pipeline 2 101b, and the end of the pipeline 2 101b away from the oil pump 102 is fixedly connected to the filter 103. The filter 103 is used to filter out impurities in the fuel inside the fuel tank 100 to prevent impurities from entering the interior of the engine and causing wear and failure of the engine. The end of the filter 103 away from the pipeline 2 101b is fixedly connected to the pipeline 3 101c, and the other side of the fuel tank 100 is fixedly connected to the pipeline 4 101d. The main pipe 101e is fixedly connected between the pipeline 3 101c and the pipeline 4 101d.

[0030] Preferably, pipe 1 101a, pipe 2 101b, pipe 3 101c, pipe 4 101d and main pipe 101e are interconnected, and pipe components 101 are made of 316 stainless steel, which has better corrosion resistance, higher density and better wear resistance. When the engine is running, the lubricating oil temperature is high, and 316 stainless steel material can better maintain system stability. Pipe 1 101a, pipe 2 101b, pipe 3 101c and pipe 4 101d in pipe component 101 can be L-shaped, M-shaped or Z-shaped, and are arranged according to the actual situation on site. This schematic diagram is for reference only.

[0031] The staff stores a sufficient amount of fuel inside the fuel tank 100, and then checks the connection between the fuel tank 100, the fuel pump 102 and the filter 103 and the pipe assembly 101 to ensure that the pipe assembly 101 is tightly connected to the fuel tank 100, the fuel pump 102 and the filter 103, so that the engine can operate normally when the device is connected to the engine.

[0032] Example 2

[0033] Reference Figure 1-Figure 3 This is the second embodiment of the present invention. Different from the previous embodiment, this embodiment uses a one-way valve 104a and a one-way valve 104b to direct the fuel in the fuel tank 100 to flow in the pipe assembly 101 in a certain direction, thereby ensuring the normal operation of the engine and the stability of the system.

[0034] Specifically, the one-way valve assembly 104 includes a one-way valve 104a and a one-way valve 104b. A throttling orifice plate is fixedly connected to the one-way valve 104a and the one-way valve 104b to limit and regulate the flow of fuel, thereby controlling the stability of the fuel pressure in the pipeline assembly 101.

[0035] Furthermore, one-way valve 104a is fixedly connected between pipeline 3 101c and main pipe 101e, and one-way valve 104a can only allow fuel to flow from pipeline 3 101c to main pipe 101e. One-way valve 2 104b is fixedly connected between pipeline 4 101d and main pipe 101e, and one-way valve 2 104b can only allow fuel to flow from main pipe 101e to pipeline 4 101d.

[0036] Preferably, a reduction gearbox 105 is fixedly connected between the main pipe 101e and the pipe four 101d, which is used to convert the high speed of the engine into a lower speed so as to more efficiently drive the wheels or other mechanical devices.

[0037] During the operation of the entire device, the fuel inside the fuel tank 100 flows through the one-way valve 1 104a and the one-way valve 2 104b in the one-way valve assembly 104 in sequence, through the pipeline 1 101a, the oil pump 102, the pipeline 2 101b, the filter 103, the pipeline 3 101c, the one-way valve 1 104a, the main pipe 101e, the one-way valve 2 104b and the pipeline 4 101d, and then flows into the interior of the fuel tank 100, controlling the direction of fuel flow to ensure that the fuel will not flow back when the pressure provided by the oil pump 102 is insufficient. At the same time, it is also beneficial to maintain the pressure stability inside the pipeline assembly 101.

[0038] Example 3

[0039] Reference Figure 1-Figure 3 This is the third embodiment of the present utility model. Different from the previous embodiment, this embodiment shortens the length, diameter and shape of the sampling tube 200b, thereby solving the problems of low pressure in the pipeline assembly 101 and slow starting of the DC pump when the oil pump 102 fails, thereby avoiding the occurrence of oil shortage and damage to the generator bearing.

[0040] Specifically, a sampling assembly 200 is provided on the side of the surface of the main pipe 101e close to the pipe four 101d. The sampling assembly 200 includes a sampling port 200a. The sampling port 200a is opened on the surface of the main pipe 101e. A sampling tube 200b is fixedly connected to the outside of the sampling port 200a, and a pressure transmitter 200c is fixedly connected to the end of the sampling tube 200b.

[0041] Furthermore, the sampling port 200a is on the side of the main pipe 101e, and the sampling port 200a is above the main pipe 101e, and is arranged according to the specific conditions on site.

[0042] Preferably, a pressure switch 1 200d is fixedly connected to the side of the pressure transmitter 200c, and a pressure switch 2 200e is fixedly connected to the side of the pressure transmitter 200c away from the pressure switch 1 200d. The pressure switch 1 200d is an on button, and the pressure switch 2 200e is an off button.

[0043] Different from the original device, this device removes the sampling tube 200b 10 meters away from the sampling port 200a of the original generator lubricating oil main pipe 101e, and the newly installed pressure transmitter 200c is about 1.7 meters vertically and about 0.3 meters horizontally from the sampling port 200a.

[0044] Since the shorter the diameter of the pipe through which the fuel passes, the lower its flow resistance, the shorter the distance of sampling tube 200b is, the shorter the time it takes for the fuel pressure in sampling tube 200b to drop when the fuel pump 102 stops operating. Therefore, while the original sampling tube 200b has a diameter of 1 / 4 inch, the sampling tube 200b of this device has a diameter of 1 / 2 inch. It is also made of 316 stainless steel, which offers improved corrosion resistance, higher density, and greater wear resistance.

[0045] When other conditions remain unchanged, the larger the pipe diameter, the smaller the fuel flow resistance inside the pipeline assembly 101. When the oil pump 102 stops operating, the fuel pressure in the pipeline assembly 101 drops faster, and the response time of the pressure transmitter 200c is shorter.

[0046] The original sampling tube 200b uses a straight tube plus an adapter. Small debris easily accumulates at the adapter position, affecting the flow of fuel, and the joint is also prone to oil leakage. According to the position of the sampling port 200a and the newly designed lubricating oil pressure transmitter 200c, the pipeline direction of the sampling tube 200b is designed as shown in the figure. The sampling tube is bent using a pipe bender, and a tube goes to the end, making the oil path more unobstructed. During use, the staff presses the pressure switch 1 200d to turn on the pressure transmitter 200c. When the device stops running, the staff presses the pressure switch 2 200e to turn off the pressure transmitter 200c. The signal transmission between the fuel pressure transmitter 200c and the pressure switch uses a dedicated flame-retardant computer cable, model GB-ZR-DJYP2VP2, with specifications of 5*2*1.0mm. 2 , effectively solving the problem of the generator's oil pump 102 failure or low pressure in the lubricating oil main pipe 101e, which in turn causes the DC pump to start too slowly.

[0047] This device breaks through foreign technology blockades and can provide reference for similar units within and outside the group. It effectively solves the problem of generator lubricating oil pump failure or low lubricating oil main pressure, which in turn leads to slow DC pump activation. It ensures that the DC pump activation time meets industry requirements and effectively avoids damage to generator bearings caused by slow oil pump activation. This is particularly important for units participating in black starts. Since each black start carries the risk of power loss in the gas turbine PC section, the DC pump's activation response time is extremely important when the gas turbine PC section loses power. Rapid and stable DC pump activation is one of the necessary conditions for ensuring safe gas turbine shutdown.

[0048] This patent has been modified and applied to the lubricating oil systems of two gas turbine generators of Huadian Nanning New Energy Co., Ltd. Through sampling in the modified method, when the AC lubricating oil pump fails, the backup AC pump can be started in less than one second; when the whole plant loses power, the lubricating oil main pipe leaks, or the unit is stopped by a black start, the DC oil pump can be started within 3 seconds when the lubricating oil main pipe pressure is as low as 12psi, which is nearly 70% shorter than the response time before the modification, ensuring that the unit can be shut down safely and stably.

[0049] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0051] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A lubricating oil pump control device for a gas turbine unit, characterized in that: include, An oil tank (100), a pipe assembly (101) located on both sides of the oil tank (100), an oil pump (102) located on one side of the pipe assembly (101), a filter (103) located on one side of the oil pump (102), a one-way valve assembly (104) located on both sides of the oil tank (100) and the filter (103), and a sampling assembly (200) located inside the one-way valve assembly (104).

2. The lubricating oil pump control device for a gas turbine unit according to claim 1, characterized in that: The pipeline assembly (101) comprises a pipeline 1 (101a), wherein the pipeline 1 (101a) is fixedly connected to one side of the oil tank (100), the oil pump (102) is fixedly connected to one end of the pipeline 1 (101a) away from the oil tank (100), the end of the oil pump (102) away from the pipeline 1 (101a) is fixedly connected to the pipeline 2 (101b), the filter (103) is fixedly connected to one end of the pipeline 2 (101b) away from the oil pump (102), the end of the filter (103) away from the pipeline 2 (101b) is fixedly connected to the pipeline 3 (101c), the other side of the oil tank (100) is fixedly connected to the pipeline 4 (101d), and a main pipe (101e) is fixedly connected between the pipeline 3 (101c) and the pipeline 4 (101d).

3. The lubricating oil pump control device for a gas turbine unit according to claim 2, characterized in that: The pipeline 1 (101a), pipeline 2 (101b), pipeline 3 (101c), pipeline 4 (101d) and main pipe (101e) are in a state of interconnection.

4. The lubricating oil pump control device for a gas turbine unit according to claim 3, characterized in that: The one-way valve assembly (104) includes one-way valve 1 (104a) and one-way valve 2 (104b), wherein the one-way valve 1 (104a) is fixedly connected between pipeline 3 (101c) and the main pipe (101e), and the one-way valve 2 (104b) is fixedly connected between pipeline 4 (101d) and the main pipe (101e).

5. The lubricating oil pump control device for a gas turbine unit according to claim 4, characterized in that: A reduction gear box (105) is fixedly connected between the main pipe (101e) and the pipeline four (101d).

6. The lubricating oil pump control device for a gas turbine unit according to claim 5, characterized in that: A sampling assembly (200) is provided on the side of the surface of the mother pipe (101e) close to the pipeline four (101d). The sampling assembly (200) comprises a sampling port (200a). The sampling port (200a) is opened on the surface of the mother pipe (101e). A sampling tube (200b) is fixedly connected to the outside of the sampling port (200a). The end of the sampling tube (200b) is fixedly connected to a pressure transmitter (200c).

7. The lubricating oil pump control device for a gas turbine unit according to claim 6, characterized in that: The sampling port (200a) is located on the side of the mother tube (101e).

8. The lubricating oil pump control device for a gas turbine unit according to claim 6, characterized in that: The sampling port (200a) is above the main tube (101e).

9. The lubricating oil pump control device for a gas turbine unit according to claim 7 or 8, characterized in that: A pressure switch 1 (200d) is fixedly connected to a side of the pressure transmitter (200c), and a pressure switch 2 (200e) is fixedly connected to a side of the pressure transmitter (200c) away from the pressure switch 1 (200d).

10. The lubricating oil pump control device for a gas turbine unit according to claim 9, characterized in that: The pressure switch 1 (200d) is an on button, and the pressure switch 2 (200e) is an off button.

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