Horizontal centrifugal pump filter screen device and oil supply system

Abstract

The utility model discloses a horizontal centrifugal pump filter screen device and an oil supply system, and relates to the technical field of horizontal centrifugal pumps, the horizontal centrifugal pump filter screen device comprises an oil inlet pipe, a filter assembly and a limit assembly, the oil inlet pipe is used for being communicated with a pump body of a horizontal centrifugal pump, and the limit assembly is used for being communicated with the oil inlet pipe. The oil inlet pipe is provided with an oil inlet, an oil outlet and an oil passing channel communicated with the oil inlet and the oil outlet, the oil inlet pipe is provided with a first side, an inserting groove communicated with the oil passing channel is formed in the outer surface of the first side, the filtering assembly is detachably connected to the inserting groove in an inserted mode, the limiting assembly comprises a pressing part, and the pressing part is connected with the pressing part. The pressing part can move close to or far away from the filtering assembly, so that the filtering assembly is limited when the pressing part moves towards the filtering assembly, and the limiting of the filtering assembly is relieved when the pressing part is far away from the filtering assembly, and then the filtering assembly is detached from the inserting groove; the joint of the oil inlet pipe and the oil outlet pipe of the oil tank does not need to be detached, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of horizontal centrifugal pumps, in particular to a filter device and an oil supply system of a horizontal centrifugal pump. Background Art

[0002] The AC electric auxiliary oil pump in the oil supply system is a horizontal centrifugal pump driven by an AC motor. It is installed on the top cover of the oil tank. A filter is installed on the oil pump inlet to prevent impurities from entering the oil system. The oil output of the oil pump passes through a check valve and is connected to the oil pipe after the check valve at the oil injector outlet. The check valve at the oil pump outlet prevents the oil in the oil system from flowing back to the oil tank through the oil pump when the oil pump is not working. When the horizontal centrifugal pump in the oil supply system is working, it can provide all the lubricating oil through the oil cooler. This part of the oil is provided by the oil injector when the turbine is operating normally. During the start-up and shutdown of the turbine, the electric lubricating oil pump must be put into operation. In the event of an accident, it should be able to automatically start working in time as a backup pump for the main oil pump. It is an important component of the entire oil supply system.

[0003] In the prior art, the horizontal centrifugal pump of the oil supply system is used as an AC electric auxiliary oil pump. During actual operation, a filter is installed at the oil pump inlet to prevent impurities from entering the oil supply system. However, most of the existing filter structures are installed at the oil pump inlet flange. Each time maintenance and replacement is performed, the oil pump inlet flange and the oil tank outlet pipe need to be disassembled, which is relatively cumbersome. Utility Model Content

[0004] The main purpose of the utility model is to provide a horizontal centrifugal pump filter device and an oil supply system, aiming to solve the problem of disassembly of the horizontal centrifugal pump filter.

[0005] In order to achieve the above-mentioned purpose, the horizontal centrifugal pump filter device proposed in the utility model comprises:

[0006] An oil inlet pipe, used to communicate with a pump body of the horizontal centrifugal pump, the oil inlet pipe having an oil inlet, an oil outlet, and an oil passage connecting the oil inlet and the oil outlet, the oil inlet pipe having a first side, an outer surface of the first side having a slot connected to the oil passage;

[0007] A filter assembly is detachably plugged into the slot; and

[0008] The limiting component includes a pressing part, which can move toward or away from the filter component to limit the filter component when moving toward the filter component and release the limiting of the filter component when moving away from the filter component.

[0009] In one embodiment, the filter assembly includes a plug-in portion, to which a filter screen is fixedly connected. The filter screen extends radially along the oil inlet pipe and is connected to the oil passage. An end of the plug-in portion away from the filter screen is inserted into the slot.

[0010] In one embodiment, a slide groove extending radially along the oil inlet pipe is provided inside the first side, and the limit assembly further includes a driving part, and the driving part includes:

[0011] A slider connected to the pressing part, the slider is arranged in the slide groove and has an upward and downward movable stroke; and

[0012] The compression elastic member is arranged between the sliding block and the top surface of the sliding groove, and two ends thereof abut against the sliding block and the top surface of the sliding groove respectively.

[0013] In one embodiment, one end of the sliding block is fixedly connected to a connecting rod, and the pressing portion is rotatably mounted to the connecting rod.

[0014] In one embodiment, the compression elastic member includes a compression spring.

[0015] In one embodiment, the filter assembly also includes a pressing plate, which is connected to the plug-in portion and protrudes from the slot. A slot is recessed on a side of the pressure plate away from the first side or on two side surfaces adjacent to the first side, and a blocking block is protruding from the pressing portion so that when the slider moves away from the first side, the blocking block is at least partially engaged in the blocking slot, and when the slider moves close to the first side, the blocking block is separated from the blocking slot.

[0016] In one embodiment, two of the clamping slots are provided and are located on a side surface of the pressing plate away from the first side, and two of the limiting components and two of the sliding slots are also provided correspondingly.

[0017] In one embodiment, the two side walls of the slot close to the first side are ringed with a top groove located at the upper end, and the two side walls of the slot away from the first side are ringed with a bottom groove located at the lower end, and seals are installed in the top groove and the bottom groove, and the seals are interference fit with the top groove and the bottom groove.

[0018] In one embodiment, the sealing member comprises a sealing ring, and the sealing ring comprises:

[0019] A first sealing ring is disposed in the top groove, wherein a first protrusion is formed on a side of the first sealing ring away from the first side; and

[0020] The second sealing ring is arranged in the bottom groove, and a second protrusion is formed on one side of the second sealing ring close to the side wall of the slot.

[0021] The utility model also provides an oil supply system for a horizontal centrifugal pump filter device, comprising:

[0022] A horizontal centrifugal pump filter device, such as the horizontal centrifugal pump filter device described above;

[0023] A horizontal centrifugal pump, comprising a pump body and a rotating shaft, wherein the pump body is connected to the oil inlet pipe;

[0024] an oil tank oil outlet pipe connected to the oil inlet; and

[0025] A motor is connected to one end of the rotating shaft.

[0026] In the technical solution of the utility model, the horizontal centrifugal pump filter device includes an oil inlet pipe, a filter assembly and a limit assembly. The oil inlet pipe is used to communicate with the pump body of the horizontal centrifugal pump, and has an oil inlet, an oil outlet and an oil passage connecting the oil inlet and the oil outlet. The oil inlet pipe has a first side, and the outer surface of the first side is provided with a slot connecting the oil passage. The filter assembly can be detachably inserted in the slot. The limit assembly includes a pressing part, and the pressing part can move toward or away from the filter assembly to limit the filter assembly when moving toward the filter assembly, and release the limit on the filter assembly when moving away from the filter assembly, so that the filter assembly can be removed from the slot. There is no need to disassemble the connection between the oil outlet pipe and the oil inlet pipe of the oil tank, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of the horizontal centrifugal pump oil supply system provided by the utility model;

[0029] Figure 2 for Figure 1 A schematic cross-sectional view of a filter device for a medium horizontal centrifugal pump;

[0030] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0032] Description of Figure Numbers:

[0033] 1000. Oil supply system of horizontal centrifugal pump; 100. Filter device of horizontal centrifugal pump; 1. Oil inlet pipe; 11. Oil inlet; 12. Oil outlet; 13. First side; 14. Slot; 15. Top slot; 16. Bottom slot; 17. Slide; 2. Filter assembly; 21. Plug-in portion; 22. Filter; 23. Pressing plate; 231. Slot; 3. Limiting assembly; 31. Driving portion; 311. Sliding block; 312. Compression elastic member; 313. Connecting rod; 32. Pressing portion; 321. Block; 4. Sealing ring; 41. First sealing ring; 411. First protrusion; 42. Second sealing ring; 421. Second protrusion; 10. Oil outlet pipe of oil tank; 20. Motor; 30. Horizontal centrifugal pump.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] 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 of 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.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The AC electric auxiliary oil pump in the oil supply system is a horizontal centrifugal pump filter device driven by an AC motor. It is installed on the top cover of the oil tank. A filter is installed on the oil pump inlet to prevent impurities from entering the oil system. The oil output of the oil pump passes through a check valve and is connected to the oil pipe after the check valve at the oil injector outlet. The check valve at the oil pump outlet prevents the oil in the oil system from flowing back to the oil tank through the oil pump when the oil pump is not working. When the horizontal centrifugal pump filter device in the oil supply system is working, it can provide all the lubricating oil that passes through the oil cooler. This part of the oil is provided by the oil injector when the turbine is operating normally. During the start-up and shutdown of the turbine, the electric lubricating oil pump must be put into operation. In the event of an accident, it should be able to automatically start working in time as a backup pump for the main oil pump. It is an important component of the entire oil supply system.

[0039] In the prior art, the horizontal centrifugal pump of the oil supply system is used as an AC electric auxiliary oil pump. During actual operation, a filter is installed at the oil pump inlet to prevent impurities from entering the oil supply system. However, most of the existing filter structures are installed at the oil pump inlet flange. Each time maintenance and replacement is performed, the oil pump inlet flange and the oil tank outlet pipe need to be disassembled, which is relatively cumbersome.

[0040] In view of this, the utility model provides a horizontal centrifugal pump filter device and an oil supply system.

[0041] See also Figure 1 and Figure 2 In one embodiment of the utility model, the filter device of the horizontal centrifugal pump includes an oil inlet pipe 1, a filter assembly 2 and a limit assembly 3. The oil inlet pipe 1 is used to communicate with the pump body of the horizontal centrifugal pump. The oil inlet pipe 1 has an oil inlet 11, an oil outlet 12 and an oil passage connecting the oil inlet 11 and the oil outlet 12. The oil inlet pipe 1 has a first side 13. The outer surface of the first side 13 is provided with a slot 14 connecting the oil passage. The filter assembly 2 can be detachably plugged into the slot 14. The limit assembly 3 includes a pressing portion 32. The pressing portion 32 can move toward or away from the filter assembly 2 so as to limit the filter assembly 2 when moving toward the filter assembly 2, and release the limit on the filter assembly 2 when moving away from the filter assembly 2.

[0042] Specifically, the first side 13 of the oil inlet pipe 1 is located at the upper end of the oil inlet pipe 1. The specific shape of the oil inlet pipe 1 is not limited here, and it can be square or circular. The slot 14 extends along the radial direction of the oil inlet pipe 1. The pressing part 32 and the limiting component 3 can be integrally arranged or protruded on the limiting component 3. Of course, the specific shape of the pressing part 32 is not limited here, and it can be a frustum or a square block. The movable stroke of the pressing part 32 can include a front and rear movable stroke, a left and right movable stroke, and an up and down movable stroke, and can also have the above two or three directions of movable stroke at the same time, as long as it can move close to the filter component 2 and away from the filter component 2, so that when the pressing part 32 moves close to the filter component 2, the pressing part 32 can limit the filter component 2 at least in the up and down directions, and when the pressing part 32 moves away from the filter component 2, the pressing part 32 can release the limit on the filter component 2.

[0043] The technical solution of the utility model is that the filter assembly 2 is detachably inserted into the slot 14. After the pressing portion 32 releases the limit on the filter assembly 2, the filter assembly 2 can be removed from the slot 14. The removal process does not require disassembling the connection between the oil tank outlet pipe 10 and the oil inlet pipe 1, which is not only simple to operate but also avoids oil leakage at the connection.

[0044] For further information, see Figure 2 The filter assembly 2 includes a plug-in portion 21. The specific shape of the plug-in portion 21 is not limited here. For example, it can be rectangular or cylindrical. In the embodiment of the utility model, the plug-in portion 21 is cylindrical, and the plug-in portion 21 is fixedly connected with a filter screen 22. Specifically, the filter screen 22 is a metal filter screen and is welded to the lower end of the plug-in portion 21. The length of the metal filter screen extends along the radial direction of the oil inlet pipe 1. The thickness can be the same as the overall thickness of the plug-in portion 21, or it can be smaller than the overall thickness of the plug-in portion 21 to facilitate pulling out from the slot 14. It can be understood that in order to fully contact the oil in the oil passage, the outer contour of the metal filter screen is set to adapt to the cross-section of the cavity of the oil inlet pipe 1, and the filter screen 22 is connected to the oil passage, and the end of the plug-in portion 21 away from the filter screen is inserted in the slot 14 to make the entire filter assembly 2 more stable.

[0045] See also Figure 2In an embodiment of the utility model, a slide groove 17 extending radially along the oil inlet pipe 1 is provided inside the first side 13, and the limit assembly 3 also includes a driving part 31, and the driving part 31 has an upward and downward movable stroke. The driving part 31 includes a slider 311 and a compression elastic member 312. The slider 311 is connected to the pressing part 32 and is arranged in the slide groove 17 and has an upward and downward movable stroke. The compression elastic member 312 is arranged between the slider 311 and the top surface of the slide groove 17, and the two ends respectively abut the slider 311 and the top surface of the slide groove 17. Specifically, the specific shape of the compression elastic member 312 is The type is not limited here, and it can be a compression spring, or compressed rubber, etc. The compression elastic member 312 is in a compressed state and has elastic potential energy, so that the slider 311 is pushed away from the first side 13, and then the pressing part 32 connected to the slider 311 is close to the filter component 2 to limit it. When the filter component 2 needs to be removed from the oil inlet pipe 1, an upward thrust is applied to the slider 311, so that the slider 311 moves in the direction close to the first side 13, and then the pressing part 32 moves away from the filter component 2, and the limit on the filter component 2 is released so that the filter component 2 can be removed from the slot 14.

[0046] Based on the above embodiment, in order to facilitate the upward pulling out of the filter assembly 2, a certain avoidance space needs to be set up, so one end of the slider 311 is fixedly connected to the connecting rod 313, and the pressing part 32 can be rotatably installed on the connecting rod 313. Specifically, the pressing part 32 can be hinged on the connecting rod 313, so that when the pressing part 32 releases the limit on the filter assembly 2, the pressing part 32 rotates around the connecting rod 313 to move away from the filter assembly 2, thereby providing avoidance space for the filter assembly 2 to be pulled out upward.

[0047] In the embodiment of the present invention, the compression elastic member 312 is a compression spring. The specific shape of the compression spring is not limited here. A barrel-shaped compression spring is preferred, which is not only easy to install but also has strong elastic deformation ability.

[0048] In order to facilitate the removal of the filter assembly 2 when it is disassembled, the filter assembly 2 is further provided with a pressing plate 23, which is connected to the plug-in portion 21 and protrudes from the slot 14. The shape of the lower surface of the pressing plate 23 is adapted to the shape of the outer contour of the oil inlet pipe 1. In the present embodiment, the oil inlet pipe 1 is square, so the lower surface of the pressing plate 23 is also square, that is, the pressing plate 23 is flat, and a groove 231 is recessed on a side of the pressing plate 23 away from the first side 13 or on two side surfaces adjacent to the first side 13, and a clamping block 321 is convexly provided on the pressing portion 32, so that when the slider 311 moves away from the first side 13, the clamping block 321 is at least partially engaged in the clamping groove 231, and when the slider 311 moves close to the first side 13, the clamping block 321 is separated from the clamping groove 231. By setting the clamping groove 231 and the clamping block 321, the pressing plate 23 is better limited and does not rotate.

[0049] In order to make the entire mechanism more stable and reliable, two card slots are provided and are located on the side surface of the pressure plate 23 away from the first side 13, and two corresponding limit components 3 and slide grooves 17 are also provided. The two limit components 3 are symmetrically arranged and located on both sides of the pressure plate 23, so that the force on the pressure plate 23 is more balanced.

[0050] Please continue reading Figure 2 It can be understood that in order to enhance the sealing of the slot 14 when the oil circuit is flowing, the two side walls of the slot 14 close to the first side 13 are ringed with a top groove 15 located at the upper end, and the two side walls of the slot 14 away from the first side 13 are ringed with a bottom groove 16 located at the lower end. Seals are installed in both the top groove 15 and the bottom groove 16. The specific form of the seal is not limited here, and it can be a sealing gasket or a sealing ring. The seal is interference fit with the top groove 15 and the bottom groove 16, which makes the sealing effect better.

[0051] For further information, see Figure 3 and Figure 4 The sealing member includes a sealing ring, the specific model of the sealing ring is selected according to the specific working conditions, the sealing ring includes a first sealing ring 41 and a second sealing ring 42, the first sealing ring is arranged in the top groove 15, and a first protrusion 411 is formed on the side of the first sealing ring away from the first side 13, and the setting of the first protrusion 411 prevents oil from flowing from the gap between the slot 14 and the plug-in portion 21 to the pressure plate 23, thereby avoiding oil leakage;

[0052] The second sealing ring 42 is arranged in the bottom groove 16. A second protrusion 421 is formed on one side of the second sealing ring 42 close to the side wall of the slot 14, which can not only prevent the oil from flowing to the upper end, but also play a buffering role to prevent the system from being strained during operation vibration.

[0053] The utility model also proposes a horizontal centrifugal pump oil supply system 1000, which includes a horizontal centrifugal pump 30, an oil tank oil outlet pipe 10, a motor 20 and a horizontal centrifugal pump filter device 100. The specific structure of the horizontal centrifugal pump filter device 100 refers to the above embodiment. Since the horizontal centrifugal pump oil supply system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which are not repeated here one by one. The horizontal centrifugal pump 30 includes a pump body and a rotating shaft, the pump body is connected to the oil inlet pipe 1, one end of the rotating shaft is connected to the motor 20 through a coupling, the oil tank oil outlet pipe 10 is connected to the oil inlet 11, and the motor 20 and the horizontal centrifugal pump 30 are arranged on the fixed seat of the oil tank top cover, which makes the whole system more compact and saves space.

[0054] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A horizontal centrifugal pump filter device, characterized in that: include: An oil inlet pipe, used to communicate with a pump body of the horizontal centrifugal pump, the oil inlet pipe having an oil inlet, an oil outlet, and an oil passage connecting the oil inlet and the oil outlet, the oil inlet pipe having a first side, an outer surface of the first side having a slot connected to the oil passage; A filter assembly is detachably plugged into the slot; and The limiting component includes a pressing part, which can move toward or away from the filter component to limit the filter component when moving toward the filter component and release the limiting of the filter component when moving away from the filter component.

2. The horizontal centrifugal pump filter device according to claim 1, characterized in that: The filter assembly includes a plug-in portion, to which a filter screen is fixedly connected. The filter screen extends radially along the oil inlet pipe and is connected to the oil passage. One end of the plug-in portion away from the filter screen is inserted into the slot.

3. The horizontal centrifugal pump filter device according to claim 2, characterized in that: The first side is provided with a slide groove extending radially along the oil inlet pipe, and the limit assembly further includes a driving part, which includes: A slider connected to the pressing part, the slider is arranged in the slide groove and has an upward and downward movable stroke; and The compression elastic member is arranged between the sliding block and the top surface of the sliding groove, and two ends thereof abut against the sliding block and the top surface of the sliding groove respectively.

4. The horizontal centrifugal pump filter device according to claim 3, characterized in that: One end of the sliding block is fixedly connected to a connecting rod, and the pressing portion is rotatably mounted on the connecting rod.

5. The horizontal centrifugal pump filter device according to claim 3, characterized in that: The compression elastic member includes a compression spring.

6. The horizontal centrifugal pump filter device according to claim 3, characterized in that: The filter assembly also includes a pressing plate, which is connected to the plug-in portion and protrudes from the slot. A slot is recessed on a side of the pressing plate away from the first side or on two side surfaces adjacent to the first side. A blocking block is protruding from the pressing portion so that when the slider moves away from the first side, the blocking block is at least partially engaged in the blocking slot, and when the slider moves close to the first side, the blocking block is separated from the blocking slot.

7. The horizontal centrifugal pump filter device according to claim 6, characterized in that: The clamping slots are provided with two and are located on a side surface of the pressing plate away from the first side, and the limiting components and the sliding slots are also provided with two corresponding ones.

8. The horizontal centrifugal pump filter device according to claim 1, characterized in that: The two side walls of the slot close to the first side are ringed with a top groove at the upper end, and the two side walls of the slot away from the first side are ringed with a bottom groove at the lower end. Seals are installed in both the top groove and the bottom groove, and the seals are interference fit with the top groove and the bottom groove.

9. The horizontal centrifugal pump filter device according to claim 8, characterized in that: The sealing member comprises a sealing ring, and the sealing ring comprises: A first sealing ring is disposed in the top groove, wherein a first protrusion is formed on a side of the first sealing ring away from the first side; and The second sealing ring is arranged in the bottom groove, and a second protrusion is formed on one side of the second sealing ring close to the side wall of the slot.

10. A horizontal centrifugal pump oil supply system, characterized in that: include: A horizontal centrifugal pump filter device, a horizontal centrifugal pump filter device as claimed in any one of claims 1 to 9; A horizontal centrifugal pump, comprising a pump body and a rotating shaft, wherein the pump body is connected to the oil inlet pipe; an oil tank oil outlet pipe connected to the oil inlet; and A motor is connected to one end of the rotating shaft.

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