A sealing performance testing device for marine diesel engines

Abstract

This invention discloses a sealing performance testing device for marine diesel engines, comprising a test housing for testing sealing performance and a connecting housing for connecting to the marine diesel engine, and a control valve mounted on the test housing. The output end of the test housing is provided with a connector for connecting to the connecting housing. A pressure gauge communicating with the test housing is mounted on the test housing, and a detection seat communicating with the pressure gauge is located inside the test housing. A safety cylinder is located inside the test housing, and multiple through grooves are formed on the outer surface of the safety cylinder. A fixing rod is located inside the safety cylinder, and a push rod is provided on the end face of the fixing rod. The valve body of the test housing of this invention will experience wear after repeated use, although the wear is relatively minor. However, due to the slow pressure relief of the valve body, the pressure relief rate measured by the pressure gauge differs from the actual pressure relief rate, affecting the test results. This invention solves the problem of poor measurement accuracy caused by poor sealing performance in existing testing devices.

Description

Technical Field

[0001] This invention relates to the field of diesel engine testing technology, and in particular to a sealing performance testing device for marine diesel engines. Background Technology

[0002] When testing the sealing performance of a diesel engine crankcase, a test connector is usually installed on the crankcase first. Then, air pressure is injected into the crankcase through the test housing along the test connector, and the data is then read by instruments.

[0003] In existing technologies, the valve body of the test housing will wear down after repeated use, although the wear is relatively minor. However, the valve body will also experience slow pressure relief, causing the pressure relief rate measured by the pressure gauge to differ from the actual pressure relief rate, which affects the test results and often causes incalculable losses to mechanical equipment, personal safety, and economy. Therefore, we propose a sealing performance testing device for marine diesel engines. Summary of the Invention

[0004] The purpose of this invention is to reduce the impact of the above-mentioned situation and to provide a sealing performance testing device for marine diesel engines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sealing performance testing device for a marine diesel engine, comprising a test housing for testing sealing performance and a connecting housing for connecting to the marine diesel engine, and a control valve provided on the test housing, wherein the output end of the test housing is provided with a connector for connecting to the connecting housing, a pressure gauge communicating with the test housing is provided on the test housing, and a detection seat communicating with the pressure gauge is provided inside the test housing;

[0006] The test housing is equipped with a safety cylinder, and the outer surface of the safety cylinder has multiple through slots.

[0007] A fixing rod is provided inside the safety cylinder. A top rod is provided on the end face of the fixing rod. Multiple channels are evenly opened on the top rod. A sealing cylinder is provided on the other end face of the fixing rod, which slides and seals with the through groove. A first spring for resetting the fixing rod is provided inside the sealing cylinder. A sliding rod is provided inside the sealing cylinder, and a push plate is provided on the sliding rod.

[0008] The detection seat is equipped with a sealing plate, and a second spring connects the sealing plate to the push plate.

[0009] Preferably, the connecting housing is provided with an annular limiting ring, the connecting housing is provided with a through hole, the connecting housing is provided with a third spring, the end face of the third spring is connected to a sealing cover, and the sealing cover is slidably connected to the connecting housing, and the sealing cover and the limiting ring are sealed and fitted together.

[0010] Preferably, the input end of the test housing is provided with a connector for connecting to the cylinder.

[0011] Preferably, a first limiting groove is provided inside the test housing, and a first limiting block is provided on the fixing rod, with the first limiting block slidably connected to the first limiting groove.

[0012] Preferably, the detection seat has a second limiting groove, the sealing plate has a second limiting block, and the second limiting block is slidably connected to the second limiting groove.

[0013] Preferably, the detection seat has a connecting hole for sealing the sealing plate, and the connecting hole is connected to the through groove and channel.

[0014] Preferably, the connecting housing end face is provided with a pressure relief hole.

[0015] Preferably, the connector is threadedly connected to the connecting housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present invention achieves double sealing through a valve and a sealing plate, that is, when the pressure is stabilized, the sealing plate returns to its original position along the second spring, resulting in a good sealing effect.

[0018] 2. This invention connects the outer shell to the connector, and the outer shell is provided with a through hole, a third spring and a sealing cover. Before air pressure is injected, the crankcase is sealed to prevent dust and dirt from entering the equipment and to ensure the equipment works effectively.

[0019] 3. The sealing cylinder of this invention slides along the safety cylinder to achieve a seal at the output end of the test housing, ensuring the sealing effect when the equipment is stationary. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of a sealing performance testing device for a marine diesel engine according to the present invention;

[0021] Figure 2 This is a side view of the sealing performance testing device for a marine diesel engine according to the present invention.

[0022] Figure 3 This is a cross-sectional structural schematic diagram of a sealing performance testing device for a marine diesel engine according to the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the testing base of the sealing performance testing device for a marine diesel engine according to the present invention;

[0024] Figure 5 This is a schematic diagram of the safety cylinder of a sealing performance testing device for a marine diesel engine according to the present invention;

[0025] Figure 6 This is a front view schematic diagram of the connecting housing of a sealing performance testing device for a marine diesel engine according to the present invention;

[0026] Figure 7 This is a cross-sectional view of the outer casing of a marine diesel engine sealing performance testing device according to the present invention.

[0027] In the picture:

[0028] 1. Test housing; 11. Connector; 12. Connecting seat; 13. Control valve; 14. Pressure gauge; 15. First limiting groove; 2. Fixing rod; 21. Top rod; 22. First limiting block; 23. Channel; 24. Sealing cylinder; 25. First spring; 26. Slide rod; 27. Push plate; 3. Detection seat; 31. Second limiting groove; 32. Sealing plate; 33. Second spring; 34. Second limiting block; 4. Connecting housing; 41. Limiting ring; 42. Through hole; 43. Third spring; 44. Sealing cover; 5. Safety cylinder; 51. Through groove. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-7 The present invention provides a technical solution: a sealing performance testing device for a marine diesel engine, comprising a test housing 1 for testing sealing performance and a connecting housing 4 for connecting to the marine diesel engine, and a control valve 13 provided on the test housing 1, a connector 11 connected to the connecting housing 4 provided at the output end of the test housing 1, a pressure gauge 14 communicating with the test housing 1 provided on the test housing 1, and a detection seat 3 communicating with the pressure gauge 14 provided inside the test housing 1;

[0031] The test housing 1 is equipped with a safety cylinder 5, and the outer surface of the safety cylinder 5 is provided with multiple through slots 51;

[0032] A fixing rod 2 is provided inside the safety cylinder 5. A top rod 21 is provided on the end face of the fixing rod 2. Multiple channels 23 are evenly opened on the top rod 21. A sealing cylinder 24 is provided on the other end face of the fixing rod 2, which slides and seals with the through groove 51. A first spring 25 for resetting the fixing rod 2 is provided inside the sealing cylinder 24. A sliding rod 26 is provided inside the sealing cylinder 24, and a push plate 27 is provided on the sliding rod 26.

[0033] A sealing plate 32 is provided inside the detection seat 3, and a second spring 33 is connected between the sealing plate 32 and the push plate 27.

[0034] The connecting housing 4 is installed on the crankcase of the diesel engine. Then, the cylinder output pipe is connected to the test housing 1, and the connector 11 is connected to the connecting housing 4. Then, the push rod 21 pushes the first spring 25 to compress, causing the sealing cylinder 24 to slide along the safety cylinder 5, thus opening the through groove 51. Then, air pressure is injected into the cylinder, which pushes the sealing plate 32. The air pressure enters the through groove 51 of the safety cylinder 5 along the connecting hole, and then enters the connecting housing 4 along the channel 23 of the push rod 21, and then enters the crankcase of the diesel engine along the connecting housing 4.

[0035] When the pressure is stabilized, the control valve 13 is closed, and the second spring 33 pushes the sealing plate 32, so that the sealing plate 32 fits with the connection hole and achieves a seal, thereby achieving a secondary closure. At this time, the crankcase of the diesel engine is connected to the pressure gauge 14 to detect the pressure of the crankcase of the diesel engine and ensure the pressure measurement effect.

[0036] The connecting housing 4 is provided with an annular limiting ring 41. The connecting housing 4 has a through hole 42. The connecting housing 4 is provided with a third spring 43. The end face of the third spring 43 is connected to a sealing cover 44, and the sealing cover 44 is slidably connected to the connecting housing 4. The sealing cover 44 and the limiting ring 41 are sealed and fitted together. The end face of the connecting housing 4 is provided with a pressure relief hole.

[0037] The limiting ring 41 of the connecting housing 4 is fitted with the connector 11. During this process, the push rod 21 pushes the sealing cover 44, causing the sealing cover 44 to slide along the connecting housing 4, thereby opening the through hole 42, so that the gas in the air pump can enter the crankcase of the diesel engine along the through hole 42. The setting of the pressure relief hole makes it easy for the sealing cover 44 to slide and reset along the connecting housing 4.

[0038] Further optimization scheme: The input end of the test housing 1 is provided with a connecting seat 12 for connecting with the cylinder, and the cylinder output pipe is connected to the connecting seat 12 of the test housing 1, so that the cylinder can inject air pressure into the crankcase of the diesel engine through the test housing 1.

[0039] The test housing 1 has a first limiting groove 15 inside, and the fixed rod 2 has a first limiting block 22. The first limiting block 22 is slidably connected to the first limiting groove 15. The first limiting groove 15 is set to limit the movement trajectory of the fixed rod 2 to ensure the stability of the equipment operation.

[0040] The detection seat 3 has a second limiting groove 31, and the sealing plate 32 has a second limiting block 34, which is slidably connected to the second limiting groove 31. The detection seat 3 has a connecting groove for the sealing plate 32 to slide, wherein the radius of the sealing plate 32 is smaller than the connecting groove of the detection seat 3, so that the air pressure can enter the connecting groove along the connecting hole and promote the flow of air pressure. The sealing plate 32 slides along the second limiting groove 31 through the second limiting block 34 to realize the opening and closing of the connecting hole.

[0041] The test seat 3 has a connection hole for sealing the sealing plate 32. The connection hole is connected to the through groove 51 and the channel 23.

[0042] Further optimization: Connector 11 is threaded to the connecting housing 4.

[0043] The working principle of this device is as follows: First, the connecting housing 4 is installed on the crankcase of the diesel engine;

[0044] Then, the cylinder output pipe is connected to the test housing 1, and the connector 11 is connected to the connecting housing 4. During the connection process, the limiting ring 41 of the connecting housing 4 is in contact with the connector 11, the push rod 21 is in contact with the sealing cover 44, the first spring 25 and the third spring 43 are compressed, that is, the sealing cylinder 24 slides along the safety cylinder 5, the sealing cylinder 24 is in contact with the safety cylinder 5, so that the through groove 51 is opened, the push rod 21 pushes the sealing cover 44, so that the sealing cover 44 slides along the connecting housing 4, thereby opening the through hole 42 and opening the control valve 13. Then, the cylinder injects air pressure to push the sealing plate 32. The air pressure enters from the connecting groove along the connecting hole, and enters the through groove 51 along the safety cylinder 5. Then, it enters the connecting housing 4 along the channel 23 of the push rod 21, and then enters the crankcase of the diesel engine along the through hole 42 of the connecting housing 4.

[0045] When the pressure is stabilized, the control valve 13 is closed, and the second spring 33 pushes the sealing plate 32, so that the sealing plate 32 fits with the connection hole to achieve a seal, thereby achieving secondary closure and improving the sealing of the equipment. At this time, the crankcase of the diesel engine is connected to the pressure gauge 14 to detect the pressure of the crankcase of the diesel engine and ensure the pressure measurement effect.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing performance testing device for a marine diesel engine, comprising a test housing (1) for testing sealing performance and a connection housing (4) for connecting to the marine diesel engine, and a control valve (13) disposed on the test housing (1), characterized in that, The output end of the test housing (1) is provided with a connector (11) that is connected to the connecting housing (4). The test housing (1) is provided with a pressure gauge (14) that is connected to the test housing (1). The test housing (1) is provided with a detection seat (3) that is connected to the pressure gauge (14). The test housing (1) is provided with a safety cylinder (5), and the outer surface of the safety cylinder (5) is provided with multiple through slots (51). A fixing rod (2) is provided inside the safety cylinder (5). A top rod (21) is provided on the end face of the fixing rod (2). Multiple channels (23) are evenly opened on the top rod (21). A sealing cylinder (24) is provided on the other end face of the fixing rod (2) to slide and seal with the through groove (51). A first spring (25) for resetting the fixing rod (2) is provided inside the sealing cylinder (24). A sliding rod (26) is provided inside the sealing cylinder (24). A push plate (27) is provided on the sliding rod (26). A sealing plate (32) is provided inside the detection seat (3), and a second spring (33) is connected between the sealing plate (32) and the push plate (27).

2. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The connecting shell (4) is provided with an annular limiting ring (41), the connecting shell (4) is provided with a through hole (42), the connecting shell (4) is provided with a third spring (43), the end face of the third spring (43) is connected to a sealing cover (44), and the sealing cover (44) is slidably connected to the connecting shell (4), and the sealing cover (44) and the limiting ring (41) are sealed and fitted together.

3. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The test housing (1) has a connector (12) at its input end for connecting to the cylinder.

4. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The test housing (1) has a first limiting groove (15) inside, and the fixing rod (2) has a first limiting block (22) on it. The first limiting block (22) is slidably connected to the first limiting groove (15).

5. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The detection seat (3) has a second limiting groove (31) and the sealing plate (32) has a second limiting block (34) which is slidably connected to the second limiting groove (31).

6. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The detection seat (3) has a connection hole for sealing the sealing plate (32), and the connection hole is connected to the through groove (51) and the channel (23).

7. The sealing performance testing device for a marine diesel engine according to claim 2, characterized in that: The connecting shell (4) has a pressure relief hole on its end face.

8. The sealing performance testing device for a marine diesel engine according to claim 1, characterized in that: The connector (11) is threadedly connected to the connecting housing (4).

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