An injector oil supply system

Abstract

This invention relates to the field of turbine lubrication technology, specifically disclosing an oil ejector supply system. The system includes a main oil pump, an oil tank, an oil ejector, oil supply pipelines, and oil-using equipment. The oil ejector draws oil from the oil tank and supplies it to the turbine to ensure the normal and safe operation of the oil-using equipment. This invention solves the problems of high pressure rise, low efficiency, cavitation susceptibility, and high noise associated with oil ejectors, ensuring the safe and reliable operation of the turbine and conserving lubricating oil resources.

Description

Technical Field

[0001] This invention relates to the field of turbine lubrication technology, specifically to an oil injector supply system for turbine units. Background Technology

[0002] Currently, turbine units using an injector-based oil supply system generally include an oil supply injector and a lubricating oil supply injector. The outlet pressure of the oil supply injector is approximately 0.2 MPa, while the outlet pressure of the lubricating oil supply injector can reach up to 0.45 MPa. The ideal pressure boost for the injector is 0.2–0.3 MPa. When the injector pressure boost exceeds 0.3 MPa, efficiency is low, cavitation is prone to occur, and noise is high.

[0003] In the prior art, CN112483201A discloses an oil supply system powered by an injector, focusing on an oil supply system powered by a single injector; CN2864183Y discloses a steam turbine oil supply system using two parallel injectors; CN213270002U discloses an annular injector for a steam turbine oil supply system in a thermal power plant, focusing on the structural design of the injector. None of these technologies contain any descriptions of injector-based oil supply systems relevant to this application. Summary of the Invention

[0004] The technical objective of this invention is to overcome the shortcomings of the prior art and provide an oil injection system to solve the technical problems of high pressure rise, low efficiency, easy cavitation, and high noise of the oil injector, so as to ensure the safe operation of the steam turbine.

[0005] The technical objective of this invention is achieved through the following technical solution: an oil injector supply system, the oil supply system comprising a main oil pump, an oil tank, an oil injector, an oil supply pipeline, and oil-using equipment;

[0006] The oil injector draws oil from the oil tank and supplies it to the steam turbine to ensure the normal and safe operation of the oil-using equipment.

[0007] Furthermore, the oiling equipment is a component of the steam turbine that needs lubrication;

[0008] The oil injector is divided into an oil supply injector and a lubricating oil supply injector;

[0009] The oil outlet of the oil injector is divided into two paths: one path goes to the main oil pump through the oil injection pump inlet pipe, and the other path goes to the lubricating oil injector through the first oil suction pipe.

[0010] Furthermore, part of the oil after the main oil pump outlet is transported to the lubricating oil injector via the lubrication injector supply pipe, and the other part is transported to the oil supply injector via the injector working oil pipe.

[0011] Furthermore, the oil supply injector absorbs the oil from the main oil pump outlet and the oil supply injector outlet, mixes them, and then supplies the oil to the steam turbine of the oil-using equipment through the lubricating oil header.

[0012] Furthermore, the outlet pressure of the oil injector is P1, and the outlet pressure of the lubricating oil injector is P2;

[0013] And P2 > P1.

[0014] Furthermore, the value of P1 ranges from 0.1 MPa to 0.3 MPa;

[0015] The value of P2 ranges from 0.2 MPa to 0.5 MPa.

[0016] Preferably, the value of P1 is in the range of 0.2 MPa;

[0017] The value of P2 is 0.45 MPa.

[0018] A single-to-dual-stage injector oil supply system, based on the above-mentioned oil supply system structure, forms the following oil supply process:

[0019] The oil supply injector draws oil from the oil tank. The oil drawn in enters the oil supply injector through the second oil suction pipe. After being pressurized, part of the oil is supplied to the main oil pump, and the other part enters the lubricating oil supply injector. After being pressurized by the lubricating oil supply injector, the oil enters the lubricating oil header.

[0020] The main oil pump draws oil and pressurizes it in a single stage via an oil supply injector.

[0021] The lubricating oil is pressurized in two stages by an oil supply injector and a lubricating oil supply injector.

[0022] This forms a single- or dual-stage injector oil supply system.

[0023] The beneficial technical effects of the present invention are as follows: The above-mentioned technical measures effectively solve the technical problems of high pressure rise, low efficiency, easy cavitation and high noise of the oil injector in the lubricating oil supply technology of steam turbine unit, which can effectively ensure the safe and reliable operation of steam turbine and save lubricating oil resources. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the oil supply system of the present invention.

[0025] The symbols in the diagram mean: 1—Main oil pump; 2—Oil supply injector; 3—Lubricating oil injector; 4—First suction pipe; 5—Oil injector working oil pipe; 6—Oil tank; 7—Lubricating oil main pipe; 8—Second suction pipe; 9—Oil injection pump inlet pipe; 10—Oil injection pump outlet pipe; 11—Lubricating oil injector supply pipe. Detailed Implementation

[0026] This invention relates to the field of turbine lubrication technology, specifically to an oil injector supply system for turbine units. The technical solution of this invention will be clearly and thoroughly explained below with reference to the accompanying drawings.

[0027] See Figure 1 As shown, the present invention is an oil supply system for an oil injector applied to a steam turbine unit, which includes a main oil pump 1, an oil tank 6, an oil supply injector 2, a lubricating oil supply injector 3, an oil supply pipeline, and oil-using equipment.

[0028] Specifically, the oil injector 2 and the lubricating oil injector 3 are arranged inside the oil tank 6. After the oil injector 2 and the lubricating oil injector 3 draw oil from the oil tank 6, they supply oil to the steam turbine to ensure the normal and safe operation of the oil-using equipment.

[0029] Oil-using equipment refers to rotating components of steam turbine units that require lubrication, including bearings and rotors.

[0030] The above describes the oil ejector as divided into an oil supply ejector 2 and a lubricating oil supply ejector 3. The oil outlet of the oil supply ejector 2 is divided into two paths: one path goes to the main oil pump 1 through the oil injection pump inlet pipe 9, that is, the outlet of the oil supply ejector 2 is connected to the inlet of the main oil pump 1 through the oil injection pump inlet pipe 9; the other path supplies the lubricating oil supply ejector 3 through the first oil suction pipe 4, that is, the outlet of the oil supply ejector 2 is connected to the inlet of the lubricating oil supply ejector 3 through the first oil suction pipe 4.

[0031] The aforementioned main oil pump 1 is located outside the oil tank 6. A portion of the oil after the outlet of the main oil pump 1 is transported to the lubricating oil ejector 3 via the lubrication ejector supply pipe 11; that is, the outlet of the main oil pump 1 is connected to the inlet of the lubrication ejector 3 via the lubrication ejector supply pipe 11. The other portion of the oil after the outlet of the main oil pump 1 is transported to the oil ejector 2 via the ejector working oil pipe 5; that is, the outlet of the main oil pump 1 is connected to the inlet of the oil ejector 2 via the ejector working oil pipe 5. The ejector working oil pipe 5 and the lubrication ejector supply pipe 11 branch off from the main oil pump outlet pipe 10 connected to the outlet of the main oil pump 1.

[0032] After the aforementioned lubricating oil injector 3 absorbs the oil from the outlet of the main oil pump 1 and the corresponding oil from the outlet of the oil injector 2 (i.e., the oil transported through the first oil suction pipe 4), the oil is mixed and then supplied to the various oil-using equipment of the steam turbine through the lubricating oil header pipe 7.

[0033] The inlet of the aforementioned oil injector 2 also draws oil from the oil tank 6 through the second oil suction pipe 8.

[0034] The outlet pressure of the aforementioned oil injector 2 is P1, and the outlet pressure of the lubricating oil injector 3 is P2. The value of P1 ranges from 0.1 MPa to 0.3 MPa, and the value of P2 ranges from 0.2 MPa to 0.5 MPa. P2 is required to be greater than P1. In the optimal case, the value of P1 is 0.2 MPa, and the value of P2 is 0.45 MPa.

[0035] The structure of the above-mentioned fuel supply system forms a single-to-two-stage fuel supply mode, that is, it constitutes a single-to-two-stage fuel supply system, specifically:

[0036] The oil supply injector 2 draws oil from the oil tank 6 through the second oil suction pipe 8. After the oil drawn through the second oil suction pipe 8 enters the oil supply injector 2 and is pressurized, part of it is supplied to the main oil pump 1 through the main oil pump inlet pipe 9, and the other part enters the lubricating oil supply injector 3 through the second oil suction pipe 4. After being pressurized by the lubricating oil supply injector 3, it enters the lubricating oil header pipe 7.

[0037] The main oil pump 1 draws oil through the oil supply injector 2 for single-stage pressure boosting;

[0038] The lubricating oil is pressurized in two stages by oil supply injector 2 and lubricating oil supply injector 3;

[0039] This forms a single-stage / dual-stage injector fuel supply system.

[0040] The above specific technical solutions are only used to illustrate the present invention, and are not intended to limit it.

[0041] Although the present invention has been described in detail with reference to the specific technical solutions described above, those skilled in the art should understand that modifications can still be made to the specific technical solutions described above, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. An injector oil supply system, characterized in that: The oil supply system includes a main oil pump (1), an oil tank (6), an oil injector, oil supply pipelines, and oil-using equipment; Among them, the oil injector draws oil from the oil tank (6) and supplies oil to the steam turbine to ensure the normal and safe operation of the oil-using equipment; The oil-using equipment is a component of the steam turbine that needs to be lubricated; The oil injector is divided into an oil supply injector (2) and a lubricating oil supply injector (3). The oil outlet of the oil supply injector (2) is divided into two paths: one path goes to the main oil pump (1) through the main oil pump inlet pipe (9), and the other path goes to the lubricating oil supply injector (3) through the first suction pipe (4). A portion of the oil after the outlet of the main oil pump (1) is transported to the lubricating oil injector (3) via the lubricating oil injector supply pipe (11), and another portion is transported to the oil injector (2) via the injector working oil pipe (5). The oil supply injector (3) absorbs the oil from the outlet of the main oil pump (1) and the oil supply injector (2), and after mixing, it is supplied to the steam turbine of the oil-using equipment through the lubricating oil header (7) via the oil supply injector (3). The outlet pressure of the oil injector (2) is P1, and the outlet pressure of the lubricating oil injector (3) is P2. And P2 > P1; The value of P1 ranges from 0.1 MPa to 0.3 MPa; The value of P2 ranges from 0.2 MPa to 0.5 MPa.

2. The oil injector supply system according to claim 1, characterized in that: The value range of P1 is 0.2 MPa; The value of P2 is 0.45 MPa.

3. A single-stage / dual-stage injector oil supply system, characterized in that: Based on the oil injector supply system configuration described in claim 1 or 2, the following oil supply process is formed: The oil supply injector (2) draws oil from the oil tank (6). The oil drawn in enters the oil supply injector (2) through the second oil suction pipe (8) and is pressurized. Part of the oil is supplied to the main oil pump (1), and the other part enters the lubricating oil injector (3). After being pressurized by the lubricating oil injector (3), the oil enters the lubricating oil header (7). The main oil pump (1) draws oil through the oil supply injector (2) for single-stage pressure boosting; The lubricating oil is pressurized in two stages by the oil supply injector (2) and the lubricating oil supply injector (3); This forms a single- or dual-stage injector oil supply system.

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