Loading device for cold running break-in test of external combustion engine products

Abstract

The present application relates to the field of engine running-in technology, and particularly relates to a loading device for cold running-in test of external combustion engine product, a gas cavity is formed among an inner shell, an end cover and a connecting flange, a liquid cavity is formed among the inner shell and an outer shell or among the inner shell, the outer shell and the end cover, the gas cavity is communicated with the outside through a gas supply interface and communicated with an engine gas chamber of the tested product through an air inlet, the liquid cavity is communicated with a cooling liquid source through a liquid inlet pipe and communicated with a cooling liquid collecting device through a liquid outlet pipe. In use, high pressure gas is delivered into the engine gas chamber of the tested product through the gas supply interface, the gas cavity and the air inlet, so as to provide working resistance for the engine; at the same time, the liquid cavity forms a cooling water jacket outside the inner shell, and the liquid cavity forms flowing liquid through the liquid inlet pipe and the liquid outlet pipe, so as to accelerate heat dissipation in the gas cavity, thereby meeting the requirement of cold running-in test, and further enabling the external combustion engine power device to perform cold running-in test.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine running-in technology, and in particular to a loading device for cold running-in test of external combustion engine product. BACKGROUND

[0002] Engine running-in refers to the trial operation of motion working condition parameters and working specifications for the purpose of making the surface state and mechanical physical properties of each matching pair of new or repaired engine assembly meet the requirements for long-term working condition according to the working characteristics of the engine.

[0003] After a certain external combustion engine power device is newly assembled, the engine, pump valve and other supply components need to complete the cold running-in test before the hot running power test. During the cold running-in test, the product is fixed on a special test bench, a driving motor is used to drive the engine to rotate, and then high-pressure gas is filled into the engine to provide working resistance, so as to ensure that the test parameters of the product meet the requirements under different rotating speeds and back pressures. However, the combustion chamber assembled in the product is not communicated with the engine piston during the hot running power test, and the structure of the product is limited, which results in that the combustion chamber cannot be used during the cold running-in test, thereby causing the cold running-in test of the product to be difficult to perform. SUMMARY

[0004] In order to overcome the technical defects that the certain external combustion engine power device is difficult to perform the cold running-in test, the present application provides a loading device for cold running-in test of external combustion engine product.

[0005] The loading device for cold running-in test of external combustion engine product provided by the present application comprises:

[0006] an inner shell body which is a cylindrical structure;

[0007] an end cover which is sealingly fixed to the rear end of the inner shell body;

[0008] a connecting flange which is sealingly fixed to the front end of the inner shell body and is adapted to be connected to the end portion of the engine gas chamber, the connecting flange, the inner shell body and the end cover form a gas cavity, the connecting flange is provided with an air inlet channel, one end of the air inlet channel is communicated with the inner cavity of the inner shell body, and the other end is adapted to be communicated with the engine gas chamber;

[0009] a gas supply interface which is fixed to the outer side of the end cover and sealingly connected, one end of the gas supply interface is communicated with the gas cavity, and the other end is communicated with the outside;

[0010] an outer shell body which is a cylindrical structure, the front end of the outer shell body is sealingly fixed to the outer side wall of the inner shell body, the rear end of the outer shell body is sealingly fixed to the outer side wall of the outer shell body and forms a liquid cavity with the inner shell body, or the rear end of the outer shell body is sealingly fixed to the end cover and forms a liquid cavity with the inner shell body and the end cover;

[0011] a liquid inlet pipe, one end of which is in sealed communication with the liquid cavity and the other end of which is in communication with the outside world;

[0012] a liquid outlet pipe, one end of which is in sealed communication with the liquid cavity and the other end of which is in communication with the outside world.

[0013] Optionally, the liquid inlet pipe comprises:

[0014] a central cooling pipe, which is located in the middle of the inner cavity of the inner shell, the front end of the central cooling pipe is fixed on and in sealed communication with the connecting flange, the front end of the central cooling pipe is isolated from the air inlet channel and in communication with the outside world, and the rear end of the central cooling pipe penetrates the end cover and is in sealed communication therewith;

[0015] an adapter pipe, one end of which is in sealed communication with the rear end of the central cooling pipe and the other end of which is in sealed communication with the liquid cavity.

[0016] Optionally, the central cooling pipe comprises:

[0017] a first connecting cylinder, which is inserted into and in sealed communication with the connecting flange, the rear end of the first connecting cylinder extends into the gas cavity and the front end thereof is in communication with the outside world;

[0018] a second connecting cylinder, which penetrates the end cover and is in sealed communication therewith, the rear end of the second connecting cylinder is in communication with the adapter pipe;

[0019] a pipe body, the front end of which is in sealed communication with the rear end of the first connecting cylinder and the rear end of which is in sealed communication with the front end of the second connecting cylinder.

[0020] Optionally, the adapter pipe comprises:

[0021] a U-shaped pipe, the first end of which is in sealed communication with the rear end of the second connecting cylinder;

[0022] an L-shaped pipe, the first end of which is in sealed communication with the second end of the U-shaped pipe and the second end of which is in sealed communication with the liquid cavity.

[0023] Optionally, the front end of the connecting flange is provided with an inlet groove, and the inlet groove is in communication with the first connecting cylinder.

[0024] Optionally, a pressure measuring port is formed in the connecting flange, and the pressure measuring port is in communication with the inlet groove.

[0025] Optionally, the air inlet channel is a plurality of axial holes formed in the connecting flange and uniformly distributed in the circumferential direction, and the plurality of axial holes are surrounded outside the inlet groove.

[0026] Optionally, the liquid outlet pipe and the liquid inlet pipe are respectively connected at two positions which are 180° apart in the circumferential direction of the outer shell.

[0027] The technical scheme provided by the application has the following advantages compared with the prior art:

[0028] The loading device for cold running break-in test of external combustion engine product provided by the application has the following advantages compared with the prior art: BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0031] Figure 1 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0032] Figure 2 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Figure 1

[0033] Figure 3 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0034] Figure 4 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Figure 3

[0035] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Figure 5

[0036] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Figure 6 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. Figure 5 The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application. ​

[0037] Fig.:

[0038] 1, inner housing; 2, end cover; 21, stepped hole; 3, connecting flange; 31, air inlet channel; 32, inlet groove; 33, pressure measuring hole; 34, annular end face; 35, first annular sealing groove; 36, annular connecting ring; 37, second annular sealing groove; 4, gas supply interface; 5, outer housing; 6, liquid inlet pipe; 61, central cooling pipe; 611, first connecting cylinder; 612, second connecting cylinder; 613, pipe body; 62, adapter pipe; 621, U-shaped pipe; 622, L-shaped pipe; 7, liquid outlet pipe; 100, air cavity; 200, liquid cavity. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the solutions of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other different manners from those described herein; obviously, the embodiments described in the specification are only some embodiments of the present application, not all embodiments.

[0041] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0042] In one embodiment, referring to Figure 1 and Figure 2 , the loading device for cold car running-in test of external combustion engine product comprises an inner housing 1, an end cover 2, a connecting flange 3, a gas supply interface 4, an outer housing 5, a liquid outlet pipe 7 and a liquid inlet pipe 6.

[0043] The inner housing 1:

[0044] Referring to Figure 1 and Figure 2 , the inner housing 1 is a cylindrical structure.

[0045] Specifically, the inner housing 1 is a cylindrical structure. Of course, in other embodiments, the inner housing 1 can also be a square tube or other shapes.

[0046] As can be easily understood, the cylindrical structure is a tubular structure with a hollow inside and two open ends.

[0047] The end cover 2:

[0048] Referring to Figure 5 and Figure 6 , the end cover 2 is sealingly fixed to the rear end of the inner housing 1.

[0049] It is easy to understand that the "sealed fixing" means that the end cover 2 is fixed at the rear end of the inner shell 1, and the joint between the end cover 2 and the inner shell 1 is sealed by a sealing ring or other means.

[0050] The connecting flange 3:

[0051] Referring to Figure 3 and Figure 4 , the connecting flange 3 is sealed and fixed to the front end of the inner shell 1 and is suitable for connecting the end of the engine air chamber. The connecting flange 3, the inner shell 1 and the end cover 2 form an air cavity 100, and the connecting flange 3 is provided with an air inlet channel 31, one end of which is communicated with the inner cavity of the inner shell 1, and the other end is suitable for being communicated with the engine air chamber.

[0052] Specifically, the front end of the connecting flange 3 is provided with an annular end face 34, and the inner and outer circles of the annular end face 34 are provided with first annular sealing grooves 35; the side wall of the connecting flange 3 is provided with an annular connecting ring 36, which is fixedly connected with the end of the engine air chamber through bolts; the side wall of the connecting flange 3 in front of the annular connecting ring 36 is provided with a second annular sealing groove 37. This connecting flange 3 is fixedly connected with the end of the engine air chamber through the annular connecting ring 36, and is sealed and connected with the engine through the first and second annular sealing grooves 35 and 37. Of course, in other embodiments, the structure of the connecting flange 3 is determined according to the adaptability of the engine structure of the tested product, but it must meet the requirements of fixed connection and sealed connection with the engine.

[0053] Specifically, the air inlet channel 31 is six axial holes uniformly distributed along the circumference of the connecting flange 3, and the axial holes are located between the two first annular sealing grooves 35. Of course, in other embodiments, the air inlet channel 31 can also be provided with only one axial hole, and can also be provided with a curved channel or a channel with other structures, as long as it can realize the communication between the air cavity 100 and the engine air chamber.

[0054] The gas supply interface 4:

[0055] Referring to Figure 1 and Figure 2 , the gas supply interface 4 is fixed to the outer side of the end cover 2 and is sealed and connected, one end of the gas supply interface 4 is communicated with the air cavity 100, and the other end is communicated with the outside.

[0056] Specifically, referring to Figure 6 , a stepped hole 21 is formed in the end cover 2, and the large diameter hole is located at the rear, the gas supply interface 4 is a straight pipe structure and is inserted into the large diameter hole, the joint between the gas supply interface 4 and the end cover 2 is sealed and welded, and the gas supply interface 4 is communicated with the air cavity 100 through the small diameter hole. Of course, the gas supply interface 4 can also be a bent pipe or have other structures provided with a gas supply channel; the gas supply interface 4 can also be fixed on the end cover 2 by bolts and sealed by a sealing ring; the gas supply interface 4 can also directly penetrate the end cover 2 and be communicated with the air cavity 100.

[0057] The outer shell 5 is in a cylindrical structure, the front end of the outer shell 5 is sealingly fixed on the outer side wall of the inner shell 1, the rear end of the outer shell 5 is sealingly fixed on the outer side wall of the outer shell 5 and forms the liquid cavity 200 with the inner shell 1, or the rear end of the outer shell 5 is sealingly fixed on the end cover 2 and forms the liquid cavity 200 with the inner shell 1 and the end cover 2.

[0058] Referring to Figure 2 , the outer shell 5 is in a cylindrical structure, the front end of the outer shell 5 is sealingly fixed on the outer side wall of the inner shell 1, the rear end of the outer shell 5 is sealingly fixed on the outer side wall of the outer shell 5 and forms the liquid cavity 200 with the inner shell 1, or the rear end of the outer shell 5 is sealingly fixed on the end cover 2 and forms the liquid cavity 200 with the inner shell 1 and the end cover 2.

[0059] Specifically, the rear end of the outer shell 5 is sealingly fixed on the end cover 2 and cooperates with the inner shell 1 and the end cover 2 to enclose the liquid cavity 200. This structure connects the inner shell 1, the outer shell 5 and the end cover 2 into a whole, and has stronger structural stability. Of course, in other embodiments, the rear end of the outer shell 5 can also be sealingly fixed on the outer side wall of the outer shell 5 and form the liquid cavity 200 with the inner shell 1.

[0060] More specifically, the outer shell 5 is sealingly fixed to the inner shell 1 or the end cover 2 by welding. Of course, as an alternative embodiment, the outer shell 5 can also be sealingly fixed by screwing a gasket.

[0061] It should be noted that the liquid cavity 200 is suitable for containing cooling liquid, which can be cooling water, mineral oil, fluorinated liquid or other cooling liquid.

[0062] The liquid inlet pipe 6:

[0063] Referring to Figure 2 , one end of the liquid inlet pipe 6 is sealingly communicated with the liquid cavity 200, and the other end is communicated with the outside.

[0064] Specifically, the liquid inlet pipe 6 includes a central cooling pipe 61 and an adapter pipe 62. The central cooling pipe 61 is located in the middle of the inner cavity of the inner shell 1, the front end of the central cooling pipe 61 is fixed on the connecting flange 3 and sealingly connected, the front end of the central cooling pipe 61 is isolated from the air inlet channel 31 and communicated with the outside, the rear end of the central cooling pipe 61 penetrates the end cover 2 and sealingly connected; the adapter pipe 62, one end of which is sealingly communicated with the rear end of the central cooling pipe 61, and the other end is sealingly communicated with the liquid cavity 200. This liquid inlet pipe 6 is provided with a central cooling pipe 61, which is located in the middle of the air cavity 100, so that the air cavity 100 can not only take away heat through the liquid cavity 200 wrapped around it, but also take away heat through the central cooling pipe 61, thereby improving the heat dissipation efficiency of the air cavity 100. Of course, in other embodiments, the liquid inlet pipe 6 can also be located completely outside the inner shell 1, and only the liquid cavity 200 wrapped around the air cavity 100 is used for heat dissipation.

[0065] More specifically, the front end of the connecting flange 3 is provided with an inlet groove 32, and the front end of the central cooling pipe 61 communicates with the outside through the inlet groove 32. This structure is suitable for engines with internal waste water channels. The inlet groove 32 can communicate with the internal waste water channel of the engine, making the connection more convenient and using waste water for cooling more energy-saving and environmentally friendly. Of course, as an alternative embodiment, the central cooling pipe 61 can also extend directly to the outside or communicate with the outside through a curved channel or other structure.

[0066] More specifically, the central cooling pipe 61 includes a first connecting cylinder 611, a second connecting cylinder 612, and a pipe body 613. The first connecting cylinder 611 is inserted and sealed on the connecting flange 3, with the rear end extending into the air cavity 100 and the front end communicating with the outside. The second connecting cylinder 612 penetrates and seals the end cover 2, with the rear end communicating with the adapter pipe 62. The front end of the pipe body 613 is in sealed communication with the rear end of the first connecting cylinder 611, and the rear end is in sealed communication with the front end of the second connecting cylinder 612. This three-section central cooling pipe 61 is more flexible and convenient to install. Of course, as an alternative embodiment, the central cooling pipe 61 can also be a one-piece pipe structure.

[0067] In detail, the first connecting cylinder 611 and the second connecting cylinder 612 are respectively inserted into the connecting flange 3 and the end cover 2 with interference and sealed by a sealing ring. Of course, the sealing of the first connecting cylinder 611 and the second connecting cylinder 612 can also be achieved by sealing gaskets or welding sealing or other commonly used methods.

[0068] Based on the above structure of the central cooling pipe 61, when the front end of the central cooling pipe 61 communicates with the outside through the inlet groove 32, the first connecting cylinder 611 communicates with the outside through the inlet groove 32. When the air inlet channel 31 is a plurality of axial holes evenly distributed on the connecting flange 3, the plurality of axial holes are surrounded outside the inlet groove 32.

[0069] More specifically, the central cooling pipe 61 is coaxial with the inner housing 1. This arrangement makes the distance between the gas in the air cavity 100 and the central cooling pipe 61 more uniform, and the heat dissipation effect better. Of course, as an alternative embodiment, the central cooling pipe 61 can also be arranged eccentrically relative to the inner housing 1.

[0070] More specifically, the adapter pipe 62 includes a U-shaped pipe 621 and an L-shaped pipe 622. The first end of the U-shaped pipe 621 is in sealed communication with the rear end of the second connecting cylinder 612; the first end of the L-shaped pipe 622 is in sealed communication with the second end of the U-shaped pipe 621, and the second end is in sealed communication with the liquid cavity 200. This adapter pipe 62 is made of U-shaped pipe 621 and L-shaped pipe 622, which are standard parts, so the processing and manufacturing are more convenient and easy. Of course, as an alternative embodiment, the U-shaped pipe 621 and the L-shaped pipe 622 can also be a one-piece flexible pipe.

[0071] outlet pipe 7:

[0072] Referring to Figure 2 , one end of the outlet pipe 7 is in sealed communication with the liquid cavity 200, and the other end is in communication with the outside.

[0073] Specifically, the outlet pipe 7 and the inlet pipe 6 are connected at two positions of the outer shell 5 that are 180° apart in the circumferential direction. This arrangement makes the inlet and outlet furthest apart, so that the cooling liquid filled in the liquid cavity 200 can fully exchange heat with the air cavity 100, improving the heat exchange rate. Of course, in other embodiments, the outlet pipe 7 and the inlet pipe 6 can also be connected at two positions of the outer shell 5 that are 90° or 45° apart in the circumferential direction, or other angles.

[0074] In the specific implementation of the loading device of the embodiment, the combustion chamber of the product under test is replaced, and the loading device is fixed and sealed with the engine air chamber end of the product under test through the connecting flange 3. Then, the high-pressure gas is delivered into the engine air chamber of the product under test through the gas supply interface 4, the air cavity 100 and the air inlet passage 31, to provide working resistance for the engine. At the same time, the liquid cavity 200 forms a cooling water jacket around the outside of the inner shell 1, and can form flowing liquid in the liquid cavity 200 through the inlet pipe 6 and the outlet pipe 7, to accelerate the heat dissipation in the air cavity 100, thereby meeting the requirements of the cold running-in test, and further enabling the external combustion engine power device to perform the cold running-in test.

[0075] In some embodiments, referring to Figure 2 , the connecting flange 3 is provided with a pressure measuring port 33.

[0076] Specifically, when the inlet groove 32 is formed on the connecting flange 3, the pressure measuring port 33 is in communication with the inlet groove 32. This structure, compared with the scheme of connecting the pressure measuring port 33 with the inlet pipe 6, does not need to open a hole on the inlet pipe 6, avoiding the secondary processing of the inlet pipe 6, and making the production simpler. Of course, in other embodiments, a hole can also be opened on the wall of the inlet pipe 6 to communicate with the pressure measuring port 33.

[0077] The above is only a specific implementation of the present application, enabling those skilled in the art to understand or implement the present application. Although the foregoing embodiments have been described in detail, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered in the protection scope of the claims.

Claims

1. A loading device for cold test of an external combustion engine product, characterized in that, The utility model provides a kind of engine cooling device, including: Inner shell (1), which is a cylindrical structure; End cover (2), which is sealed and fixed to the rear end of the inner shell (1); Connecting flange (3), which is sealed and fixed to the front end of the inner shell (1) and is suitable for connecting the end of engine gas chamber, the connecting flange (3), inner shell (1) and end cover (2) form a gas cavity (100), the connecting flange (3) is provided with an air inlet channel (31), one end of the air inlet channel (31) is communicated with the inner cavity of the inner shell (1), and the other end is suitable for communicating with the engine gas chamber; Gas supply interface (4), which is fixed to the outside of the end cover (2) and is sealed, one end of the gas supply interface (4) is communicated with the gas cavity (100), and the other end is communicated with the outside world; Outer shell (5), which is a cylindrical structure, the front end of the outer shell (5) is sealed and fixed to the outer side wall of the inner shell (1), the rear end of the outer shell (5) is sealed and fixed to the outer side wall of the inner shell (1), and the liquid cavity (200) is formed between the outer shell (5) and the inner shell (1), or the rear end of the outer shell (5) is sealed and fixed to the end cover (2), and the outer shell (5), the inner shell (1) and the end cover (2) together form a liquid cavity (200); Liquid inlet pipe (6), one end of which is sealed and communicated with the liquid cavity (200), and the other end is communicated with the outside world; Liquid outlet pipe (7), one end of which is sealed and communicated with the liquid cavity (200), and the other end is communicated with the outside world; The liquid inlet pipe (6) includes: Center cooling pipe (61), which is located in the middle of the inner cavity of the inner shell (1), the front end of the center cooling pipe (61) is fixed on the connecting flange (3) and is sealed, the front end of the center cooling pipe (61) is separated from the air inlet channel (31) and is communicated with the outside world, and the rear end of the center cooling pipe (61) penetrates the end cover (2) and is sealed; Adapter pipe (62), one end of which is sealed and communicated with the rear end of the center cooling pipe (61), and the other end is sealed and communicated with the liquid cavity (200); The center cooling pipe (61) includes: First connecting cylinder (611), which is inserted and sealed on the connecting flange (3), the rear end of the first connecting cylinder (611) extends into the gas cavity (100), and the front end is communicated with the outside world; Second connecting cylinder (612), which penetrates the end cover (2) and is sealed, the rear end of the second connecting cylinder (612) is communicated with the adapter pipe (62); Pipe body (613), the front end of which is sealed and communicated with the rear end of the first connecting cylinder (611), and the rear end is sealed and communicated with the front end of the second connecting cylinder (612); The front end of the connecting flange (3) is provided with an inlet groove (32), the inlet groove (32) is communicated with the front end of the first connecting cylinder (611), the front end of the center cooling pipe (61) is communicated with the outside world through the inlet groove (32), and the inlet groove (32) is used to communicate the waste water path inside the engine. In use, the loading device is used to replace the combustion chamber of the tested product, and the loading device is fixedly connected with the engine chamber end of the tested product through the connecting flange (3), and then high-pressure gas is sequentially delivered into the engine chamber of the tested product through the gas supply interface (4), the gas cavity (100) and the gas inlet channel (31) to provide working resistance for the engine.

2. The loading device for cold test of external combustion engine product according to claim 1, wherein The adapter pipe (62) comprises: a U-shaped pipe (621) having a first end in sealed communication with the rear end of the second connecting cylinder (612); a L-shaped pipe (622) having a first end in sealed communication with the second end of the U-shaped pipe (621) and a second end in sealed communication with the liquid cavity (200).

3. The loading device for cold test of external combustion engine product according to claim 1, wherein A pressure measuring port (33) is formed on the connecting flange (3) and is in communication with the inlet groove (32).

4. The loading device for cold test of external combustion engine product according to claim 1, wherein The gas inlet channel (31) is a plurality of axial holes formed on the connecting flange (3) and uniformly distributed in the circumferential direction, and the plurality of axial holes are surrounded outside the inlet groove (32).

5. The loading device for cold test of external combustion engine product according to any one of claims 1 to 4, characterized in that, The liquid outlet pipe (7) and the liquid inlet pipe (6) are respectively connected to two positions 180° apart in the circumferential direction of the outer shell (5).

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