Built-in filtering structure of sealing cavity of sealing oil pump of steam turbine

Abstract

The built-in filtering structure comprises an oil pump body, a first mounting ring and a second mounting ring are fixedly connected to the interior of the input end of the oil pump body, a connecting ring is fixedly connected to one side of the first mounting ring, and a filter screen is fixedly connected to the inner side of the connecting ring; one side of the connecting ring is in threaded connection with a connecting cylinder, the connecting cylinder is arranged in the input end of the oil pump body, a filter element is mounted in the connecting cylinder, a plurality of groups of first through holes are formed in the surface of the connecting cylinder, a concave screw hole is formed in the end, away from the filter screen, of the filter element, and a stud matched with the concave screw hole is fixedly connected into one end of the connecting cylinder; according to the oil pump, due to the reasonable design, the overall size of the oil pump is optimized, the filtering effect is guaranteed, the oil pump is convenient to disassemble, and replacement of the filter element is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pump technical field, concretely is a steam turbine sealing oil pump sealing cavity built -in filter structure. BACKGROUND

[0002] Sealing oil pump is a kind of pump that can send liquid into sealing cavity by certain mode, and certain pressure is generated in it, is a kind of commonly used industrial pump.

[0003] At present, sealing oil pump needs to adopt prefiltering equipment to filter lubricating oil in the use process, however, the traditional filter assembly is installed outside the oil pump, so that the overall size of the oil pump is large, which is not conducive to the installation and use of the oil pump. UTILITY MODEL CONTENTS

[0004] The utility model discloses a steam turbine sealing oil pump sealing cavity built -in filter structure to solve the problem in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a steam turbine sealing oil pump sealing cavity built -in filter structure, including oil pump body, the inside fixed coupling of oil pump body input is connected with first installation ring and second installation ring, one side of first installation ring is fixedly connected with connecting ring, the inner side of connecting ring is fixedly connected with filter screen, and one side of connecting ring is threadedly connected with connecting barrel, connecting barrel is arranged in the inside of oil pump body input, filter core is installed in the inside of connecting barrel, the surface of connecting barrel is provided with a plurality of first through -holes.

[0006] As a further preferred technical scheme, the end of the filter core away from the filter screen is provided with a concave screw hole, and the inside of one end of the connecting barrel is fixedly connected with a screw post matched with the concave screw hole.

[0007] As a further preferred technical scheme, the middle part of the inside of the filter core is fixedly connected with a connecting rod, one end of the connecting rod is fixedly connected with a spring, and one end of the spring is fixedly connected with a ball head.

[0008] As a further preferred technical scheme, the end of the filter core close to the filter screen is provided with a second through -hole, and the ball head is arranged in the inside of the second through -hole.

[0009] As a further preferred technical scheme, the first installation ring and the connecting ring are provided with a first sealing ring, the first installation ring and the second installation ring are provided with a second sealing ring, and the outer wall of the connecting barrel is attached to the inner wall of the first sealing ring and the second sealing ring.

[0010] As a further preferred technical solution of the present application, the inner part of one end of the connecting cylinder is fixedly provided with a third sealing ring, which is arranged between the connecting ring and the filter element.

[0011] The steam turbine sealing oil pump sealing cavity built-in filter structure has the following advantages: the filter assembly is arranged in the oil pump oil inlet, the overall size of the oil pump is optimized through reasonable design, the filtering effect is ensured, and the filter element can be conveniently replaced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic view of the overall structure of the utility model;

[0013] Figure 2 It is a schematic view of the connecting cylinder structure of the utility model;

[0014] Figure 3 It is an enlarged schematic view of the structure at A of the utility model;

[0015] Figure 4 It is a schematic view of the filter element structure of the utility model.

[0016] In the figure: 1, oil pump body; 2, connecting ring; 3, filter screen; 4, connecting cylinder; 5, filter element; 6, first through hole; 7, first mounting ring; 8, second mounting ring; 9, first sealing ring; 10, second sealing ring; 11, third sealing ring; 12, second through hole; 13, concave screw hole; 14, connecting rod; 15, spring; 16, ball head. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0018] The utility model provides technical schemes: as shown in Figure 1 , Figure 2 and Figure 3 , in the embodiment, a steam turbine sealing oil pump sealing cavity built-in filter structure, including oil pump body 1, the inside fixed connection of oil pump body 1 input end has first mounting ring 7 and second mounting ring 8, first mounting ring 7 and second mounting ring 8 and the input end of oil pump body 1 are integrated structure, the side fixed connection of first mounting ring 7 has connecting ring 2, connecting cylinder 2 is connected with first mounting ring 7 through screw, when disassembling, only need to unscrew the screw, connecting ring 2 can be removed together with connecting cylinder 4, the inside fixed connection of connecting ring 2 has filter screen 3, and the side of connecting ring 2 is connected with connecting cylinder 4 in screw thread, connecting cylinder 4 is arranged in the inside of oil pump body 1 input end, the inside of connecting cylinder 4 is installed with filter element 5, and the surface of connecting cylinder 4 is provided with a plurality of groups of first through hole 6.

[0019] AsFigure 2 、 Figure 3 and Figure 4 As shown in the figure, the filter core 5 is provided with a concave threaded hole 13 at one end away from the filter screen 3, and a threaded stud matched with the concave threaded hole 13 is fixedly connected to the inner part of one end of the connecting cylinder 4. The filter core 5 can be disassembled from the connecting cylinder 4 by rotating the filter core 5 through the cooperation of the concave threaded hole 13 and the threaded stud, so as to facilitate the replacement of the filter core 5.

[0020] The middle part of the filter core 5 is fixedly connected with a connecting rod 14, one end of the connecting rod 14 is fixedly connected with a spring 15, and one end of the spring 15 is fixedly connected with a ball head 16.

[0021] The filter core 5 is provided with a second through hole 12 at one end close to the filter screen 3, and the ball head 16 is arranged in the second through hole 12. The ball head 16 is used for plugging the second through hole 12 to prevent the backflow of oil when the oil pump body 1 stops running.

[0022] The first mounting ring 7 and the connecting ring 2 are provided with a first sealing ring 9, and the first mounting ring 7 and the second mounting ring 8 are provided with a second sealing ring 10. The outer wall of the connecting cylinder 4 is attached to the inner wall of the first sealing ring 9 and the second sealing ring 10. The first sealing ring 9 and the second sealing ring 10 are used to ensure the sealing between the connecting ring 2 and the connecting cylinder 4 and the oil pump body 1, so as to prevent the oil from directly entering the oil pump body 1 without being filtered.

[0023] The inner part of one end of the connecting cylinder 4 is fixedly provided with a third sealing ring 11, and the third sealing ring 11 is arranged between the connecting ring 2 and the filter core 5. The third sealing ring 11 is used to ensure the sealing between the connecting ring 2 and the connecting cylinder 4, so as to prevent the oil from directly entering the connecting cylinder 4.

[0024] The utility model provides a steam turbine sealing oil pump sealing cavity built -in filter structure, and the specific working principle is as follows: lubricating oil enters through the input end of oil pump body 1, is filtered first by filter screen 3 to intercept larger impurities, then oil pushes ball head 16 to compress spring 15 under pressure to make second through -hole 12 open, enters filter core 5, and the oil filtered through filter core 5 seeps into connecting cylinder 4, and then enters oil pump body 1 through first through -hole 6.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A built-in filter structure in a sealing cavity of a steam turbine seal oil pump, comprising a pump body (1), characterized in that: The inner part of the input end of the oil pump body (1) is fixedly connected with a first mounting ring (7) and a second mounting ring (8), one side of the first mounting ring (7) is fixedly connected with a connecting ring (2), the inner side of the connecting ring (2) is fixedly connected with a filter screen (3), one side of the connecting ring (2) is threadedly connected with a connecting cylinder (4), the connecting cylinder (4) is arranged in the inner part of the input end of the oil pump body (1), the inner part of the connecting cylinder (4) is provided with a filter element (5), and the surface of the connecting cylinder (4) is provided with a plurality of groups of first through holes (6).

2. The built-in filter structure in the sealing cavity of a steam turbine seal oil pump according to claim 1, characterized in that: The end of the filter element (5) away from the filter screen (3) is provided with a concave screw hole (13), and the inner part of one end of the connecting cylinder (4) is fixedly connected with a threaded stud matched with the concave screw hole (13).

3. The built-in filter structure in the sealing cavity of a steam turbine seal oil pump according to claim 1, characterized in that: The middle part of the inner part of the filter element (5) is fixedly connected with a connecting rod (14), one end of the connecting rod (14) is fixedly connected with a spring (15), one end of the spring (15) is fixedly connected with a ball head (16).

4. The built-in filter structure in the seal cavity of a steam turbine seal oil pump according to claim 3, characterized in that: The end of the filter element (5) close to the filter screen (3) is provided with a second through hole (12), and the ball head (16) is arranged in the inner part of the second through hole (12).

5. The built-in filter structure in the sealing cavity of a steam turbine seal oil pump according to claim 1, characterized in that: The first mounting ring (7) and the connecting ring (2) are provided with a first sealing ring (9), the first mounting ring (7) and the second mounting ring (8) are provided with a second sealing ring (10), and the outer wall of the connecting cylinder (4) is attached to the inner walls of the first sealing ring (9) and the second sealing ring (10).

6. The built-in filter structure in the sealing cavity of a steam turbine seal oil pump according to claim 1, characterized in that: The inner part of one end of the connecting cylinder (4) is fixedly provided with a third sealing ring (11), and the third sealing ring (11) is arranged between the connecting ring (2) and the filter element (5).

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