Oil pressure adjusting and protecting device for steam turbine

Abstract

The utility model belongs to the technical field of oil pressure regulation, and relates to a steam turbine oil pressure regulation and protection device which comprises an inverted-T-shaped regulator, an oil liquid conveying pipe is fixedly arranged at the bottom of the regulator, a piston plate is vertically arranged in the regulator in a sliding mode through a second spring, and oil storage pipes are fixedly connected to the two sides of the regulator. Oil leakage pipes are fixedly connected between the two oil storage pipes and the bottom of the regulator, a connecting pipe is fixedly connected to the top in each oil leakage pipe, and a sealing ball is arranged at the bottom end of each connecting pipe in a sealed and sliding mode through a first spring. The pressure relief valve has the advantages that when oil pressure is too large, buoyancy of oil can push the sealing ball upwards, the sealing ball seals the bottom end of the connecting pipe, then the oil can push the piston plate upwards to flow into the two pressure relief cavities, when the oil pressure is reduced, the oil height is reduced, the first spring pulls the sealing ball to move downwards, and the oil pressure is reduced. Therefore, oil in the pressure relief cavity can be automatically discharged, and the purpose of automatic adjustment is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil pressure regulation and relates to an oil pressure regulating and protecting device for a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with the blades to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power devices. During the use of steam turbines, oil pressure regulation is required, so a steam turbine oil pressure regulation and protection device is required.

[0003] A steam turbine bearing top shaft oil pressure regulating and protecting device disclosed in Chinese patent CN211666782U includes a regulator, an oil outlet pipe is provided on one side of the regulator, and an oil inlet pipe is provided on the other side of the regulator; an oil storage pipe is provided on the regulator, and the oil storage pipe and the regulator are an integrated structure. The bottom end of the oil storage pipe is connected to a connecting pipe, and the bottom end of the connecting pipe is connected to the regulator, and a transparent plate and a second valve are provided on the connecting pipe, and the transparent plate is provided above the second valve.

[0004] When the device is in use, the oil pressure is too high and it will automatically flow into the oil storage pipe; when the oil pressure decreases, the staff needs to open the second valve to allow the oil to flow back to the regulator. Therefore, the staff needs to observe from the transparent plate to operate the second valve, which is not convenient to use.

[0005] In order to solve the above problems, the utility model proposes a steam turbine oil pressure regulating and protecting device. Utility Model Content

[0006] In order to solve the problems existing in the background technology, the utility model proposes a turbine oil pressure regulating and protecting device.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: it includes an inverted T-shaped regulator, an oil delivery pipe is fixedly arranged at the bottom of the regulator, a piston plate is vertically slidably arranged inside the regulator through a second spring, oil storage pipes are fixedly connected on both sides of the regulator, oil leakage pipes are fixedly connected between the two oil storage pipes and the bottom of the regulator, a connecting pipe is fixedly connected to the top of each oil leakage pipe, and a sealing ball is slidably arranged at the bottom end of each connecting pipe through a first spring seal.

[0008] Furthermore, the delivery pipe includes an oil outlet pipe and an oil inlet pipe, the oil outlet pipe is fixedly connected to one end of the bottom of the regulator, and the oil inlet pipe is fixedly connected to the other end of the bottom of the regulator, and solenoid valves are arranged on the oil outlet pipe and the oil inlet pipe.

[0009] Furthermore, the bottom of the inner cavity of the regulator is an oil cavity, the inner cavities of the two oil storage tubes are both pressure relief chambers, the bottom ends of the two pressure relief chambers are connected to the oil cavity through corresponding oil leakage pipes, and the sides of the two pressure relief chambers are connected to the inner cavity of the regulator.

[0010] Furthermore, the piston plate is sealingly slidably matched with the inner wall of the regulator, and a plurality of second springs are provided, the bottom ends of the second springs are fixedly connected to the top surface of the piston plate, and the top ends of the second springs are fixedly connected to the inner top surface of the regulator.

[0011] Furthermore, two inner walls corresponding to the regulator are fixedly connected with limit blocks, the top surfaces of the two limit blocks are flush, and the piston plate is located on the top of the two limit blocks.

[0012] Furthermore, each oil leakage pipe is fixedly connected to a fixing plate inside, the fixing plate is located below the corresponding connecting pipe, the top end of the first spring is fixedly connected to the corresponding sealing ball, the bottom end of the first spring is fixedly connected to the top of the corresponding fixing plate, the diameter of the sealing ball is larger than the diameter of the bottom of the connecting pipe, and when the first spring is in a natural state, the height of the top end of the sealing ball is smaller than the height of the top surface of the limit block;

[0013] Two side surfaces of the fixing plate are fixedly connected to the oil leakage pipe, and a distance is left between the other two side surfaces of the fixing plate and the oil leakage pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The steam turbine oil pressure regulating and protecting device is fixedly provided with a connecting pipe in the oil leakage pipe, and a sealing ball is slidingly provided on the bottom end of the connecting pipe. When the oil pressure is too large, the oil increases, and the buoyancy of the oil pushes the sealing ball upward, so that the sealing ball seals the bottom end of the connecting pipe. Then the oil pushes the piston plate upward to flow into the two pressure relief chambers. When the oil pressure decreases, the oil height decreases, and the first spring pulls the sealing ball downward to automatically discharge the oil in the pressure relief chamber, thereby achieving the purpose of automatic regulation. There is no need for staff to check and operate, and it is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the regulator in the utility model;

[0018] Figure 3 It is a cross-sectional view of the oil leakage pipe in the utility model.

[0019] In the figure: 1. regulator; 2. oil outlet pipe; 3. oil inlet pipe; 4. solenoid valve; 5. oil storage pipe; 6. pressure relief chamber; 7. observation window; 8. oil leakage pipe; 9. connecting pipe; 10. sealing ball; 11. first spring; 12. fixing plate; 13. oil chamber; 14. piston plate; 15. limit block; 16. second spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1-Figure 3 As shown, the technical solution adopted by the utility model is as follows: a turbine oil pressure regulating and protecting device, comprising an inverted T-shaped regulator 1, and an oil delivery pipe is fixedly arranged at the bottom of the regulator 1.

[0022] The delivery pipe includes an oil outlet pipe 2 and an oil inlet pipe 3. The oil outlet pipe 2 is fixedly connected to one end of the bottom of the regulator 1, and the oil inlet pipe 3 is fixedly connected to the other end of the bottom of the regulator 1. Solenoid valves 4 are provided on both the oil outlet pipe 2 and the oil inlet pipe 3. The oil inlet pipe 3 delivers oil into the regulator 1, and the oil outlet pipe 2 discharges the oil in the regulator 1.

[0023] A piston plate 14 is vertically slidably arranged inside the regulator 1 via a second spring 16 , and the piston plate 14 is in sealing and sliding cooperation with the inner wall of the regulator 1 .

[0024] A plurality of second springs 16 are provided, and the bottom ends of the second springs 16 are fixedly connected to the top surface of the piston plate 14 , and the top ends of the second springs 16 are fixedly connected to the inner top surface of the regulator 1 .

[0025] Both sides of the regulator 1 are fixedly connected with oil storage pipes 5, and oil leakage pipes 8 are fixedly connected between the two oil storage pipes 5 and the bottom of the regulator 1. The oil leakage pipes 8 are arranged vertically.

[0026] An observation window 7 is provided on the side of one of the oil storage pipes 5 so that the staff can check the oil level in the oil storage pipe 5 through the observation window 7 .

[0027] The bottom of the inner cavity of the regulator 1 is an oil cavity 13, and the oil outlet pipe 2 and the oil inlet pipe 3 are respectively connected to the ends of the oil cavity 13. The inner cavities of the two oil storage pipes 5 are both pressure relief chambers 6, and the bottom ends of the two pressure relief chambers 6 are respectively connected to the oil cavity 13 through corresponding oil leakage pipes 8, and the sides of the two pressure relief chambers 6 are connected to the inner cavity of the regulator 1. When the pressure is too high, part of the oil will enter the oil storage pipe 5, achieving the purpose of pressure regulation, avoiding excessive pressure to damage the oil inlet pipe 3 or the oil outlet pipe 2, and achieving the purpose of protection.

[0028] The two corresponding inner walls of the regulator 1 are fixedly connected with the limit blocks 15, the top surfaces of the two limit blocks 15 are flush, and the piston plate 14 is located on the top of the two limit blocks 15. In the initial state, the second spring 16 pushes the piston plate 14 downward so that the piston plate 14 abuts against the limit blocks 15.

[0029] The top of each oil leakage pipe 8 is fixedly connected with a connecting pipe 9, and the inner wall of the connecting pipe 9 is circular. The bottom end of each connecting pipe 9 is provided with a sealing ball 10 through a first spring 11 for sealing and sliding.

[0030] A fixing plate 12 is fixedly connected to the interior of each oil leakage pipe 8, and the fixing plate 12 is located below the corresponding connecting pipe 9. The top end of the first spring 11 is fixedly connected to the corresponding sealing ball 10, and the bottom end of the first spring 11 is fixedly connected to the top of the corresponding fixing plate 12. The diameter of the sealing ball 10 is larger than the diameter of the bottom of the connecting pipe 9, and the bottom end of the connecting pipe 9 can be sealed by the sealing ball 10.

[0031] When the first spring 11 is in a natural state, the height of the top of the sealing ball 10 is less than the height of the top surface of the stop block 15. When there is too much oil in the oil chamber 13, the oil will first push the sealing ball 10 upward by buoyancy, so that the oil can only enter the oil storage pipe 5 through the piston plate 14.

[0032] Two side surfaces of the fixed plate 12 are fixedly connected to the oil leakage pipe 8, and a spacing is left between the other two side surfaces of the fixed plate 12 and the oil leakage pipe 8, so that the oil can be discharged into the oil chamber 13 through the spacing.

[0033] Working principle:

[0034] When in use, the solenoid valves 4 on the oil inlet pipe 3 and the oil outlet pipe 2 are opened to allow the oil to enter the oil chamber 13 of the regulator 1 through the oil inlet pipe 3 , and then the oil is discharged through the oil outlet pipe 2 .

[0035] When too much oil is fed into the oil inlet pipe 3 and the oil pressure in the oil chamber 13 is too high, the oil rises upward in the regulator 1. The oil has buoyancy on the sealing ball 10. As the oil rises, the sealing ball 10 moves upward and stretches the first spring 11 until the top of the sealing ball 10 abuts against the bottom of the connecting pipe 9, so that the sealing ball 10 seals the bottom of the connecting pipe 9.

[0036] The oil also pushes the piston plate 14 upward, causing the piston plate 14 to slide upward inside the regulator 1 and compress the second spring 16. The piston plate 14 leaves the stop block 15.

[0037] When the bottom surface of the piston plate 14 moves to above the bottom surface of the oil storage pipe 5, the oil will enter the pressure relief chamber 6. Oil will enter the connecting pipe 9. At this time, the oil pressure is reduced.

[0038] When the oil pressure decreases, the second spring 16 pushes the piston plate 14 to move downward until the piston plate 14 abuts against the limit block 15 .

[0039] The oil continues to drop, and the buoyancy of the sealing ball 10 decreases. The first spring 11 pulls the sealing ball 10 downward, and the top of the sealing ball 10 leaves the connecting pipe 9, so that the oil in the connecting pipe 9 flows back into the oil chamber 13. The purpose of automatically adjusting the oil pressure is achieved, and the oil inlet pipe 3 or the oil outlet pipe 2 is prevented from being damaged by excessive pressure, thereby achieving the purpose of protection.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam turbine oil pressure regulating and protecting device, characterized in that: The invention comprises an inverted T-shaped regulator (1), wherein an oil delivery pipe is fixedly arranged at the bottom of the regulator (1), a piston plate (14) is vertically slidably arranged inside the regulator (1) via a second spring (16), oil storage pipes (5) are fixedly connected to both sides of the regulator (1), an oil leakage pipe (8) is fixedly connected between the two oil storage pipes (5) and the bottom of the regulator (1), a connecting pipe (9) is fixedly connected to the top of each oil leakage pipe (8), and a sealing ball (10) is sealingly slidably arranged at the bottom end of each connecting pipe (9) via a first spring (11).

2. A steam turbine oil pressure regulating and protecting device according to claim 1, characterized in that: The delivery pipe comprises an oil outlet pipe (2) and an oil inlet pipe (3); the oil outlet pipe (2) is fixedly connected to one end of the bottom of the regulator (1); the oil inlet pipe (3) is fixedly connected to the other end of the bottom of the regulator (1); and solenoid valves (4) are provided on both the oil outlet pipe (2) and the oil inlet pipe (3).

3. The steam turbine oil pressure regulating and protecting device according to claim 1, characterized in that: The bottom of the inner cavity of the regulator (1) is an oil cavity (13), the inner cavities of the two oil storage pipes (5) are both pressure relief cavities (6), the bottom ends of the two pressure relief cavities (6) are connected to the oil cavity (13) through corresponding oil leakage pipes (8), and the sides of the two pressure relief cavities (6) are connected to the inner cavity of the regulator (1).

4. The steam turbine oil pressure regulating and protecting device according to claim 1, characterized in that: The piston plate (14) is sealingly slidably matched with the inner wall of the regulator (1), and a plurality of second springs (16) are provided. The bottom ends of the second springs (16) are fixedly connected to the top surface of the piston plate (14), and the top ends of the second springs (16) are fixedly connected to the inner top surface of the regulator (1).

5. A steam turbine oil pressure regulating and protecting device according to claim 4, characterized in that: The two corresponding inner walls of the regulator (1) are fixedly connected to limit blocks (15), the top surfaces of the two limit blocks (15) are flush, and the piston plate (14) is located on the tops of the two limit blocks (15).

6. A steam turbine oil pressure regulating and protecting device according to claim 1, characterized in that: A fixing plate (12) is fixedly connected to the inside of each oil leakage pipe (8), the fixing plate (12) is located below the corresponding connecting pipe (9), the top end of the first spring (11) is fixedly connected to the corresponding sealing ball (10), the bottom end of the first spring (11) is fixedly connected to the top of the corresponding fixing plate (12), the diameter of the sealing ball (10) is larger than the diameter of the bottom of the connecting pipe (9), and when the first spring (11) is in a natural state, the height of the top end of the sealing ball (10) is smaller than the height of the top surface of the limit block (15); Two side surfaces of the fixing plate (12) are fixedly connected to the oil leakage pipe (8), and a distance is left between the other two side surfaces of the fixing plate (12) and the oil leakage pipe (8).

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