CN218953441U

CN218953441U - Quick-change lubricating oil pump set capable of monitoring damage condition of internal gear

Info

Publication number: CN218953441U
Application number: CN202222826653.8U
Authority: CN
Inventors: 顾广溪; 刘军涛; 庞红波; 于淏; 张亚明; 徐连奎; 李一伦; 齐鹏飞; 郑双星
Original assignee: Xinxiang Aviation Industry Group Co Ltd
Current assignee: Xinxiang Aviation Industry Group Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-05-02
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to the technical field of lubricating oil pump design for an aeroengine lubricating oil system, in particular to a quick-change lubricating oil pump set capable of monitoring damage conditions of internal gears. The lubricating oil pump is mainly of a multistage parallel connection, pipeline and flange connection and spline transmission structure type, the disassembly and maintenance time is long, and the abrasion state of the inside of a product after long-time operation is unknown. The shell is provided with a magnetic skimming detector near the outlet of the oil return stage; the shell is provided with a plurality of positioning pins and studs on the rear end face; the shell is provided with various pipeline joints on the wall body; the last-stage shell of the pump core assembly is provided with a plurality of positioning pin holes and bolt through holes on the tail end cover, the positioning pins are matched with the positioning pin holes for positioning, and the studs penetrate through the bolt through holes and are fixedly connected with the nuts; a plurality of bolts penetrate through the bolt through holes with angular positioning function at each stage inwards from the tail end cover, and are connected and fixed into an integral structure after the pump cover. The damage condition inside the product can be quickly identified, and the product can be quickly disassembled.

Description

Quick-change lubricating oil pump set capable of monitoring damage condition of internal gear

Technical Field

The utility model relates to the technical field of lubricating oil pump design for an aeroengine lubricating oil system, in particular to a quick-change lubricating oil pump set capable of monitoring damage conditions of internal gears.

Background

Most of lubricating oil pumps used in lubricating oil systems of aeroengines or gas turbines are in multistage parallel connection, pipeline and flange connection and spline transmission, so that the disassembly and maintenance time is long, the disassembly and maintenance are inconvenient, and the abrasion state of the inside of a product after long-time operation is unknown.

Disclosure of Invention

The purpose of the utility model is that: the quick-change lubricating oil pump set can monitor the internal damage condition, and is free from disassembling a shell, a pipeline and a connecting flange. The utility model is used for rapidly identifying the damage condition of the inside of the product and rapidly disassembling and replacing the core component of the pump set which is easy to fail when the product fails in an external field or is normally overhauled, and shortens the maintenance time to 1/5 of the original maintenance time.

The quick-change lubricating oil pump set comprises a shell component and a pump core component, wherein the shell component comprises a through shell, and a magnetic skimming detector is arranged near an oil return level outlet of the shell; the shell is provided with a plurality of positioning pins and studs on the rear end face; the shell is provided with various pipeline joints on the wall body;

the last-stage shell of the pump core assembly is provided with a plurality of positioning pin holes and bolt through holes on the tail end cover, the positioning pins are matched with the positioning pin holes for positioning, and the studs penetrate through the bolt through holes and are fixedly connected with nuts; a plurality of bolts penetrate through the bolt through holes with angular positioning function at each stage inwards from the tail end cover, and are connected and fixed into an integral structure after the pump cover.

Advantageously, the pump core assembly is positioned such that each port is aligned with a pipe fitting on the housing.

Advantageously, the bolt ends are fastened by nuts and locked by locking tabs.

Advantageously, a sealing ring is also mounted on the interface of the tail end cap and the housing for sealing after assembly of the pump core assembly and housing assembly.

Advantageously, the driven shaft in the pump core assembly is designed as a wear-resistant copper shaft and is fixed.

Advantageously, a rotary dynamic seal of the cup structure is designed at the driving shaft and a radial seal ring is designed at the driven shaft to ensure the volumetric efficiency of the boost stage.

Advantageously, a rolling bearing housing is integrated in the housing assembly for supporting the engine power input shaft bearing.

Advantageously, the end face of the assembly that interfaces with the tail end cap has a connecting flange.

The engine lubricating oil system oil circulation device provides power for the circulation of engine lubricating oil system oil, and simultaneously has the capability of monitoring the damage condition inside the lubricating oil pump set.

The beneficial effects are that: compared with the prior art, the pump unit part integrated design with high failure rate, easy abrasion and limited service life is a pump core assembly, and the parts such as the shell, the pipe joint, the filter screen, the magnetic chip foam detector and the like with high reliability and simple structure are integrated and designed into the shell, so that the maintainability of the external field of the product is improved, and the maintenance time is greatly shortened.

The product is divided into two parts, namely a pump core assembly and a shell assembly, which are connected through flange screws, so that the easy-to-wear part can be replaced conveniently; the integrated filter screen that has inside damage condition monitoring function bits foam detector and fluid precision control function, it is rational in infrastructure, easy maintenance.

Drawings

FIG. 1 is an exploded view of a pump core assembly of a quick change lubricating oil pump set for monitoring internal gear damage;

FIG. 2 is an exploded view of the present quick change lubricant pump package housing assembly for monitoring internal gear damage;

fig. 3 is an assembly diagram of the quick-change lubricating oil pump set capable of monitoring damage condition of an internal gear.

1-nut, 2-lock tab, 3-gearbox oil return stage driven gear, 4-gearbox oil return stage driving gear, 5-post oil return stage driven gear, 6-post oil return stage housing, 7-cup assembly, 8-bulkhead, 9-half key, 10-seal ring, 11-bolt, 12-boost stage housing, 13-driven shaft, 14-drive shaft, 15-boost stage driven gear, 16-boost stage driving gear, 17-post oil return stage driving gear, 18-gearbox oil return stage housing, 19-pump cover, 20-bearing housing, 21-magnetic chip foam detector, 22-seal ring, 23-housing, 24-seal ring, 25-lock nut, 26-boost stage inlet fitting, 27-filter screen, 28-gearbox oil return stage inlet fitting, 29-post oil return stage inlet fitting, 30-lock nut, 31-boost stage outlet fitting, 32-oil return stage outlet fitting, 33-lock nut, 34-seal ring, 35-nut, 36-lock tab, 37-locating pin, 38-nut, 39-seal ring, 40-seal ring, 41-lock stud

Detailed Description

In the embodiment shown in fig. 1, the pump core assembly of the quick-change lubricating oil pump set capable of monitoring the damage condition of the internal gear comprises a three-stage gear pump assembly, wherein the one-stage gear pump assembly comprises a gear box oil return stage shell 18, a gear box oil return stage driven gear 3 and a gear box oil return stage driving gear 4; the secondary gear pump assembly comprises a rear oil return stage shell 6, a rear oil return stage driven gear 5 and a rear oil return stage driving gear 17; the three stage gear pump assembly includes a booster stage housing 12, a booster stage driven gear 15, and a booster stage drive gear 16 therein.

Each stage of driving gears is driven by a driving shaft 14, and each stage of driven gears is supported by a driven shaft 13. The semicircular key 9 is arranged in a key groove of the driving shaft 14, and the semicircular key is operated along with the driving shaft 14 to drive the driving gear to rotate, so that power transmission is realized, and three-level lubricating oil is conveyed in this way.

The secondary gear pump assembly is separated from the tertiary gear pump assembly by a spacer plate 8 and sealed by a cup assembly 7. The baffle plates, the three-stage shell and the pump cover 19 of the three-stage gear pump set are all provided with angularly aligned bolt through holes, the shell and the baffle plates are connected through bolts 11, and the baffle plates are fastened through nuts 1 and locked through locking plates 2.

The pressurizing-stage shell 12 is provided with a sealing groove at the position matched with the bolt 11, and is used for placing the sealing ring 10 and ensuring the sealing of the pump core assembly and the outside.

As shown in FIG. 2, the casing of the quick-change lubricating oil pump set for monitoring the damage condition of the internal gear is provided with a gear box oil return stage inlet pipe joint 28, a rear oil return stage inlet pipe joint 29, a pressure inlet stage inlet pipe joint 26, a pressure inlet stage outlet pipe joint 31 and an oil return stage outlet pipe joint 32 on the casing 23, wherein the pressure inlet stage inlet pipe joint 26, the pressure inlet stage outlet pipe joint 31 and the oil return stage outlet pipe joint 32 are respectively fastened on the casing 23 through

locking nuts

25, 30 and 33 and are connected with an engine lubricating oil system pipeline, and the inside of the casing is connected with an inlet and an outlet of a three-stage pump of a pump core. The inlet of the rear oil return stage is provided with a filter screen 27. A magnetic skimming detector 21 is arranged on the shell 23 near the outlet pipe joint of the oil return stage and is used for filtering the cleanliness of the oil return stage lubricating oil and monitoring the damage condition inside the pump body.

The front end of the shell 23 is provided with a hole for installing the bearing seat 20, and is provided with a connecting flange, a positioning spigot and a screw through hole for being connected with an engine case so as to ensure the power input of the engine. The right end opening is used for installing a pump core assembly, and a positioning pin 37 on the shell 23 is matched with a positioning pin hole on the booster stage shell 12, so that the angular positioning of the pump core assembly and the pump inlets and outlets of each stage on the shell assembly is ensured; studs 41 on housing 23 are connected to bolt holes on booster stage housing 12 for fastening the pump core assembly and the housing assembly. The 42 sealing rings on the pump core assembly are used for sealing the pump core assembly and the shell assembly from the outside after the assembly.

As shown in fig. 3, the pump core assembly is inserted into the housing, the alignment of the oil path between the pump core assembly and the housing 23 is ensured by the positioning pin 37, the sealing of the pump body and the outside is ensured by the sealing ring 39 and the sealing ring 40, and the pump core assembly and the housing 23 are fastened and connected by the nut 38. When the lubricating oil pump set is connected with the engine, a connecting flange and a locating spigot on the shell 23 are connected and fastened with the engine casing, and a gearbox oil return stage inlet pipe joint 28, a rear oil return stage inlet pipe joint 29, a pressure inlet stage pipe joint 26, a pressure inlet stage outlet pipe joint 31 and an oil return stage outlet pipe joint 32 in fig. 2 are connected with the engine pipeline.

When the magnetic skimming detector 21 on the shell detects that the pump core is abnormally worn or other faults occur in the pump core assembly and the pump core assembly needs to be eliminated, the gearbox oil return stage inlet pipe joint 28, the rear oil return stage inlet pipe joint 29, the booster stage inlet pipe joint 26, the booster stage outlet pipe joint 31, the oil return stage outlet pipe joint 32 and the like do not need to be disassembled, the connecting flange and the positioning spigot on the shell 23 are connected and fastened with the engine casing, the whole lubricating oil pump set is detached, only 4 nuts 38 need to be detached, the pump core assembly is ejected out of the shell through axial force generated on the flange of the end face of the pump core assembly, and the pump core assembly is replaced. Therefore, the monitoring of the internal abrasion condition of the pump core and the quick disassembly and replacement of the pump core assembly are realized.

The quick-change lubricating oil pump set pump capable of monitoring the damage condition of the internal gear is an involute gear type lubricating oil pump set series mode of one-stage supercharging and two-stage oil return by combining the actual condition of a lubricating oil pump for an engine lubricating oil system, and the lubricating oil pump set is provided with three inlets and two outlets. The vulnerable part of the product is three pairs of friction parts with relative motion, such as gears, partition plates, transmission shafts, shaft sleeves and the like, which are meshed with each other, and the product has long service life and high reliability, namely parts, such as an outer shell, each oil-way pipe joint, a magnetic dust detector, a filter screen and the like, so that the friction parts with relative motion are integrated and designed into a whole, the parts with long service life and high reliability are designed into a whole, the parts are sealed by screw connection, a sealing ring and positioning pins, and quick-disassembly threaded holes are arranged on a connecting flange. Once the vulnerable part fails or the magnetic dust detector is abnormal, the pump core assembly can be quickly removed from the shell through the quick-disassembly threaded hole, the new pump core assembly is replaced, the equipment capacity can be quickly restored, and the task is guaranteed to be completed.

The main innovation point of the utility model is that the replaceable unit module for realizing the quick replacement function in the external field is firstly applied to the lubricating oil system in China, and meanwhile, the filter screen and the magnetic skimming detector are integrated to monitor the damage condition in the pump, so that the integration level is high. The quick-change lubricating oil pump set capable of monitoring the damage condition of the internal gear is reasonable in design, convenient to assemble and disassemble and easy to maintain.

Claims

1. Can monitor quick change lubricating oil pump package of inside gear damage condition, its characterized in that: the quick-change lubricating oil pump set comprises a shell component and a pump core component, wherein

The shell assembly comprises a through shell (23), and a magnetic skimming detector (21) is arranged near an oil return level outlet of the shell (23); the shell (23) is provided with a plurality of positioning pins (37) and studs (41) on the rear end face; the shell (23) is provided with various pipeline joints on the wall body;

the last-stage shell of the pump core assembly is provided with a plurality of positioning pin holes and bolt through holes on the tail end cover, the positioning pins (37) are matched and positioned with the positioning pin holes, and the studs (41) penetrate through the bolt through holes and are fixedly connected with nuts; a plurality of bolts (11) penetrate through bolt through holes with angular positioning function of each stage and the pump cover (19) from the tail end cover inwards and are connected and fixed into an integral structure.

2. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: the inlet and outlet of the pump core assembly after positioning and installation are aligned with the pipeline joint on the shell (23).

3. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: the end of the bolt (11) is fastened by the nut (1) and is locked by the locking plate (2).

4. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: a sealing ring (42) is also arranged on the abutting surface of the tail end cover and the shell (23) and is used for sealing after the pump core assembly and the shell assembly are assembled.

5. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: the driven shaft (13) in the pump core assembly is designed as a wear-resistant copper shaft and is fixed.

6. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: the rotary dynamic seal of the leather cup structure is designed at the driving shaft (14), and the radial seal ring is designed at the driven shaft to ensure the volumetric efficiency of the pressurizing stage.

7. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: a rolling bearing housing is integrated into the housing assembly for supporting the engine power input shaft bearing.

8. The quick-change oil pump set capable of monitoring internal gear damage according to claim 1, wherein: the butt end face of the shell (23) and the tail end cover is provided with a connecting flange.