CN211116174U

CN211116174U - Engine oil return pipe assembly

Info

Publication number: CN211116174U
Application number: CN201921843470.9U
Authority: CN
Inventors: 蒋柏茂
Original assignee: Hangzhou Manuli Hydraulic Equipment Co ltd
Current assignee: Zhejiang powerful hydraulic Co.,Ltd.
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-07-28
Anticipated expiration: 2029-10-30

Abstract

The utility model relates to an engine returns oil pipe field, a engine returns oil pipe assembly is disclosed, including a pipe body, flange and solid fixed ring, the body middle part is the tubular metal resonator, insert in the flange intermediate hole the front end of body, gu fixed ring welds on the rear end of body, gu be equipped with first annular groove and second annular groove on the radial direction of fixed ring, gu still be equipped with the third annular groove on the fixed ring axial direction, be provided with in the first annular groove and support the ring, it is the inclined plane to support ring lower extreme face, be provided with the throw-out collar in the third annular groove, the rear end of throw-out collar is the inclined plane, the inclined plane of support ring is connected with the inclined plane contact of throw-out collar, gu fixed ring's front end still welds the apron, threaded connection has the bolt on the apron, the bolt. After the rear end of the pipe body is inserted into the engine cylinder body, the bolt drives the push ring to jack the abutting ring upwards, and the abutting ring abuts against the inner wall of the engine cylinder body after being jacked, so that the pipe body is fixed with the engine oil cylinder, and the working efficiency and the stability and the sealing performance of a joint during assembly are improved.

Description

Engine oil return pipe assembly

Technical Field

The utility model relates to an engine returns oil pipe field, especially relates to an engine returns oil pipe assembly.

Background

The diesel engine supercharger oil return pipe assembly is used for a lubricating oil return oil way of a supercharger, one end of the diesel engine supercharger oil return pipe assembly is connected with the supercharger through a flange, and the other end of the diesel engine supercharger oil return pipe assembly is inserted into an oil hole of an engine cylinder body. Besides the conventional requirements of sealing, temperature resistance, rust prevention and the like, the pipeline also needs good flexibility, and when the temperature changes, the pipeline cannot cause stress concentration due to expansion caused by heat and contraction caused by cold, so that the strength and the sealing are influenced; meanwhile, the high-frequency vibration of the pipeline of the general diesel engine is brought by good vibration resistance, so that the pipeline is easy to break, welding points are loosened, and oil leakage is caused. The oil return pipe assembly of the existing diesel engine supercharger is formed by two hard pipes which are processed and bent by a high-density pipe bender and are tightly and transitionally connected by a metal tightening hoop through a rubber pipe, wherein one hard pipe is inserted into one end of a shell of an engine, in order to ensure the sealing with the hole of the shell, an interference fit mode is adopted, and one end of the other hard pipe is connected with a flange in a welding mode. Insert engine housing through interference fit with returning oil pipe body, it is big to insert the degree of difficulty during the installation on the one hand, and installation effectiveness is not high, and on the other hand is then that the inserted part is because the engine vibrates always, and the fragile leakproofness is not good simultaneously

Chinese published patent numbers: CN207297157U discloses a vehicle that provides an engine supercharger oil return pipe assembly and has it, engine supercharger oil return pipe assembly includes: the first pipe joint is used for being connected with a middle oil return port of the supercharger; the second pipe joint is used for being connected with an oil return port of the cylinder body; the two ends of the middle pipe are respectively provided with a first corrugated pipe and a second corrugated pipe, the extension section of the first corrugated pipe is connected with a first pipe joint, the extension section of the second corrugated pipe is connected with a second pipe joint, and the oil return pipe assembly of the engine supercharger is made of stainless steel materials. The second interface of the oil return pipe assembly of the engine supercharger is buckled and connected with the engine cylinder body, so that the installation difficulty is high, and the efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses return oil pipe and the shortcoming of engine cylinder body installation difficulty among the oil pipe assembly among the prior art, provide an engine oil pipe assembly that returns.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

an engine oil return pipe assembly comprises a pipe body, a flange and a fixing ring, wherein transition pipes are arranged at the front end and the rear end of the pipe body, the transition pipe at the front end is a first transition pipe, the transition pipe at the rear end is a second transition pipe, a metal pipe is arranged in the middle of the transition pipe, the first transition pipe is inserted into a middle hole of the flange, the fixing ring is welded on the second transition pipe, a first annular groove and a second annular groove are arranged in the radial direction of the fixing ring, a third annular groove communicated with the first annular groove is further arranged in the axial direction of the fixing ring, a supporting ring is arranged in the first annular groove, the lower end face of the supporting ring is an inclined plane, a push ring is arranged in the third annular groove, the rear end of the push ring is an inclined plane matched with the lower end face of the supporting ring, the inclined plane of the supporting ring is in contact connection with the inclined plane of the push ring, a cover plate is further welded at the front end of the fixing ring, the bolt penetrates through the cover plate and is pressed on the push ring. During installation, the push ring is firstly plugged into the front end hole of the fixing ring, and then the cover plate is welded on the fixing ring. After the transition pipe of the pipe body is inserted into the engine cylinder body, the opening wall of the engine cylinder body is located at the second annular groove, then the bolt is rotated, the push ring jacks the abutting ring, the abutting ring can abut against the inner wall of the engine cylinder body after being jacked, and the oil return pipe is fixed with the engine cylinder body. The pushing ring is driven by the bolt to jack the abutting ring upwards, the abutting ring jacks the inner wall of the engine cylinder body, the pipe body is fixed with the engine oil cylinder, the inserting and fixing operation is simple, the installation working efficiency is improved, and the joint of the engine cylinder body and the oil return pipe has the advantages of good stability, strong sealing performance and the like.

Preferably, the cover plate is provided with an oil injection and discharge hole which is communicated with a threaded hole in the cover plate. Through annotating the oil drain hole, can lubricate and the oil extraction the screw thread of solid fixed ring and bolt, place the screw thread and rust and lead to the card dead.

Preferably, an O-shaped sealing ring is arranged in the second annular groove. The O-shaped sealing ring is contacted with the wall of the engine cylinder body, and meanwhile, the stability and the sealing performance of the joint of the engine cylinder body and the oil return pipe are improved.

Preferably, the pipe body further comprises a first corrugated pipe and a second corrugated pipe, the second transition pipe is connected with the metal pipe through the first corrugated pipe, and the first transition pipe is connected with the metal pipe through the second corrugated pipe. The oil return pipe is subject to vibration with amplitude difference between the cylinder body and the supercharger, and the corrugated pipe is resistant to pressure and corrosion, convenient to adjust the shape of the corrugated pipe and easy to assemble.

Preferably, the inner diameter of the first bellows from the front end to the rear end thereof is gradually reduced. The vibration that first bellows and second transition union coupling received is stronger, increases this partial wall thickness and can improve the holistic shock resistance of device.

Preferably, the inner diameter of the second bellows gradually decreases from the front end to the rear end. The second corrugated pipe is strong in vibration on the joint of the second corrugated pipe and the metal, and the integral vibration resistance of the device can be improved by increasing the wall thickness of the part.

Preferably, the flange is a flat flange joint. The whole flange surface is a sealing surface, and the flatness of the flange surface is required to be high in order to ensure the sealing performance.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the pushing ring is driven by the bolt to jack the abutting ring upwards, the abutting ring jacks the inner wall of the engine cylinder body, the pipe body is fixed with the engine oil cylinder, the inserting and fixing operation is simple, the installation working efficiency is improved, and the joint of the engine cylinder body and the oil return pipe has the advantages of good stability, strong sealing performance and the like.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged view of a structure.

Fig. 3 is a schematic cross-sectional view of the retainer ring.

Fig. 4 is a schematic cross-sectional view of the tube.

The names of the parts indicated by the numerical references in the above figures are as follows: the oil-gas well pipe comprises a pipe body 10, a flange 11, a fixing ring 12, a transition pipe 13, a metal pipe 14, a first annular groove 15, a second annular groove 16, a third annular groove 17, a butting ring 18, a pushing ring 19, a cover plate 20, a bolt 21, an oil injection and discharge hole 22, a first corrugated pipe 23, a second corrugated pipe 24, an O-shaped sealing ring 25, a first transition pipe 131, and a second transition pipe 132.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

An engine oil return pipe assembly is shown in fig. 1-3, and comprises a pipe body 10, a flange 11 and a fixing ring 12, wherein the front end and the rear end of the pipe body 10 are provided with transition pipes 13, the transition pipe 13 at the front end is a first transition pipe 131, the transition pipe 13 at the rear end is a second transition pipe 132, the middle part is provided with a metal pipe 14, the first transition pipe 131 is inserted into a middle hole of the flange 11, the fixing ring 12 is welded on the second transition pipe 132, the fixing ring 12 is provided with a first annular groove 15 and a second annular groove 16 in the radial direction, the fixing ring 12 is further provided with a third annular groove 17 communicated with the first annular groove 15 in the axial direction, a resisting ring 18 is arranged in the first annular groove 15, the lower end face of the resisting ring 18 is an inclined face, a pushing ring 19 is arranged in the third annular groove 17, the rear end of the pushing ring 19 is an inclined face matched with the lower end face of the resisting ring 18, the inclined face of the resisting ring 18, the front end of the fixed ring 12 is also welded with a cover plate 20, the cover plate 20 is connected with bolts 21 in a threaded manner, the number of the bolts 21 is 2, all the bolts 21 are uniformly distributed on the cover plate 20, and the bolts 21 penetrate through the cover plate 20 and are pressed on the push ring 19. After the second transition pipe 13 of the pipe body 10 is inserted into the engine cylinder body, the opening of the engine cylinder body is located at the second annular groove 16, then the bolt 21 is rotated, the part of the bolt 21 entering the fixed ring 12 is extended, meanwhile, the push ring 19 is driven to jack the abutting ring 18, the abutting ring 18 can abut against the inner wall of the engine cylinder body after being jacked, and the oil return pipe is fixed with the engine cylinder body.

The cover plate 20 is provided with an oil injection and discharge hole 22, and the oil injection and discharge hole 22 is communicated with a threaded hole in the cover plate 20.

An O-shaped sealing ring 25 is arranged in the second annular groove 16. The O-shaped sealing ring 25 is attached to the second annular groove 16, and the O-shaped sealing ring 25 is made of fluororubber.

The pipe body 10 further includes a first bellows 23 and a second bellows 24, as shown in fig. 4, the second transition pipe 132 is connected to the metal pipe 14 through the first bellows 23, and the first transition pipe 131 is connected to the metal pipe 14 through the second bellows 24. The metal tube 14 is made of 304 stainless steel with the wall thickness of 0.3mm, and is made of thin-wall stainless steel. The inner diameter of the first bellows 23 gradually decreases from the front end to the rear end. The inner diameter of the second bellows 24 increases from the front end to the rear end.

The flange 11 is a flat flange joint. The whole flange surface is a sealing surface, and the flatness of the flange surface is required to be high in order to ensure the sealing performance.

Example 2

The characteristics of the embodiment 2 are basically the same as those of the embodiment 1, except that the fixing ring 12 further comprises a fourth annular groove in the radial direction, a second O-shaped sealing ring is arranged in the fourth annular groove, part of the engine cylinder body adopts a double-layer design, and the two O-shaped sealing rings correspond to two layers of walls of the engine cylinder body.

Example 3

The embodiment 3 has the same characteristics as the embodiment 1, except that the rubber sheet for thrust stop is further included, the rubber sheet for thrust stop is fixedly installed at one end of the push ring 19, which is in contact with the abutting ring 18, one side of the push ring 19, which is in contact with the abutting ring 18, is a partial inclined surface, and the rubber sheet for thrust stop is arranged on the plane of the push ring 19.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. An engine oil return pipe assembly comprises a pipe body (10), a flange (11) and a fixing ring (12), wherein transition pipes (13) are arranged at the front end and the rear end of the pipe body (10), the transition pipe (13) at the front end is a first transition pipe (131), the transition pipe (13) at the rear end is a second transition pipe (132), a metal pipe (14) is arranged in the middle of the pipe body, the first transition pipe (131) is inserted into a middle hole of the flange (11), the fixing ring (12) is welded on the second transition pipe (132), the engine oil return pipe assembly is characterized in that a first annular groove (15) and a second annular groove (16) are arranged in the radial direction of the fixing ring (12), a third annular groove (17) communicated with the first annular groove (15) is further arranged in the axial direction of the fixing ring (12), a support ring (18) is arranged in the first annular groove (15), the lower end face of the support ring (18) is an inclined plane, and a push ring (19) is arranged in the, the rear end of the push ring (19) is an inclined plane matched with the lower end face of the support ring (18), the inclined plane of the support ring (18) is in contact connection with the inclined plane of the push ring (19), the front end of the fixing ring (12) is further welded with a cover plate (20), the cover plate (20) is connected with bolts (21) in a threaded mode, the number of the bolts (21) is at least 2, all the bolts (21) are uniformly distributed on the cover plate (20), and the bolts (21) penetrate through the cover plate (20) and are pressed on the push ring (19).

2. The engine oil return tube assembly of claim 1 wherein: an oil injection and discharge hole (22) is formed in the cover plate (20), and the oil injection and discharge hole (22) is communicated with a threaded hole in the cover plate (20).

3. The engine oil return tube assembly of claim 1 wherein: an O-shaped sealing ring (25) is arranged in the second annular groove (16).

4. The engine oil return tube assembly of claim 1 wherein: the pipe body (10) further comprises a first corrugated pipe (23) and a second corrugated pipe (24), the second transition pipe (132) is connected with the metal pipe (14) through the first corrugated pipe (23), and the first transition pipe (131) is connected with the metal pipe (14) through the second corrugated pipe (24).

5. The engine oil return pipe assembly of claim 4 wherein: the inner diameter of the first bellows (23) decreases from the front end to the rear end.

6. The engine oil return pipe assembly of claim 4 wherein: the inner diameter of the second bellows (24) gradually decreases from the front end to the rear end.

7. The engine oil return tube assembly of claim 1 wherein: the flange (11) is a flat flange joint.