Air compression device for air-assisted injection system

Abstract

The invention provides an air compression device for an air-assisted injection system, which comprises an air pump cover, an air delivery pipe and a water outlet pipe, the air delivery pipe and the water outlet pipe are communicated through a pipeline, the water outlet pipe is connected with a radiator, an air filter is mounted on one side of the air pump cover, and an air valve group is hermetically mounted below the air pump cover and is hermetically connected with an air pump seat; an air pump piston group and a crankshaft are mounted on the air pump seat, the crankshaft drives the piston connecting rod group to reciprocate in a piston movement cavity of the air pump seat, and a water outlet of the air pump seat is communicated with a water inlet of the air pump cover. The air compression device for the air-assisted injection system has the advantages of being high in air supply pressure, stable in air pressure, flexible in arrangement, good in structural maintainability and the like, has the characteristic of direct driving of an engine crankshaft, solves the problems of poor fuel oil atomization quality and difficult whole machine ignition caused by low air-assisted diesel oil injection pressure, and also has the advantages of being simple in structure and convenient to use. The use reliability of the whole machine is improved, and the structure of the whole machine is more compact.

Description

Technical Field

[0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to a compressed air device for an air-assisted injection system. Background Art

[0002] Diesel ignition requires high-quality atomization and fuel mixture, but diesel has defects such as high viscosity, poor atomization quality, and difficulty in forming a mixture. Therefore, a spark-ignition diesel engine requires a compressed air supply device to provide high-pressure air to the air-assisted injection system. By premixing the high-pressure air with the fuel, a diesel mixture that can be successfully ignited is obtained, thereby solving the problem of poor diesel atomization quality and difficulty in ignition of the entire machine under low injection pressure. At the same time, in order to improve the compactness of the diesel engine, the diesel engine is coaxially connected to the compressed air device. The high-speed characteristics of the ignition diesel engine require the compressed air device to have rapid response capabilities, high reliability and sealing. Summary of the invention

[0003] In view of this, the present invention aims to propose a compressed air device for an air-assisted injection system to solve the problem of poor fuel atomization quality and difficulty in ignition of the whole machine caused by low air-assisted diesel injection pressure.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A compressed air device for an air-assisted injection system includes an air pump cover and an air pipe and a water outlet pipe connected to the cover by pipelines. The water outlet pipe is connected to a radiator. An air filter is installed on one side of the air pump cover. An air valve group is sealed and installed below the air pump cover. The air valve group is sealed and connected to an air pump seat. An air pump piston group and a crankshaft are installed on the air pump seat. The crankshaft drives the piston connecting rod group to reciprocate in the piston motion chamber of the air pump seat. The water outlet of the air pump seat is connected to the water inlet of the air pump cover.

[0006] Furthermore, the air pump cover is provided with an air outlet, an air inlet, a water outlet, a water inlet, an air inlet and an air outlet; the air outlet is connected with the air outlet, and the air outlet is connected with the air pipeline to provide compressed air to the air-assisted injection system; the air inlet is connected with the air inlet, the water outlet is connected with the water inlet, the water outlet is connected with the water outlet pipe through a joint, the air inlet is installed with an air filter, and the air outlet is connected with the air pipeline.

[0007] Furthermore, the air valve group includes an intermediate block and an exhaust valve plate and an intake valve plate installed thereon. The intermediate block is provided with an intake duct and an exhaust duct. The exhaust valve plate covers the upper side of the exhaust duct on the intermediate block, and the intake valve plate covers the lower side of the intake duct on the intermediate block.

[0008] Furthermore, the air valve group also includes an exhaust limit block and an air intake baffle, the air intake baffle is located below the air intake valve plate, and the exhaust limit block is located above the exhaust valve plate.

[0009] Furthermore, the exhaust valve plate is fixed to the middle block by bolts or rivets.

[0010] Furthermore, the air pump seat is provided with a water inlet and a water outlet, the water inlet is connected to a water inlet pipe, and the water outlet is communicated with the water inlet of the air pump cover.

[0011] Furthermore, the air pump seat is provided with an installation observation hole.

[0012] Furthermore, the No. 1 sealing gasket and the No. 2 sealing gasket are respectively placed between the air valve group and the air pump cover, and between the air valve group and the air pump seat.

[0013] Compared with the prior art, the compressed air device for the air-assisted injection system of the present invention has the following advantages:

[0014] (1) The compressed air device for the air-assisted injection system described in the present invention has the advantages of high air supply pressure, stable air pressure, flexible layout, good structural maintainability, etc. It has the characteristic of being directly driven by the engine crankshaft, which not only solves the problems of poor fuel atomization quality and difficulty in ignition of the whole machine caused by low air-assisted diesel injection pressure, but also improves the reliability of the whole machine and makes the whole machine structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 An exploded view of a compressed air device for an air-assisted injection system according to an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the air pump cover according to the embodiment of the present invention Figure 1 ;

[0018] Figure 3 Schematic diagram of the air pump cover according to the embodiment of the present invention Figure 2 ;

[0019] Figure 4 A schematic diagram of a gas valve assembly according to an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the air pump base according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1-air delivery pipe; 2-water outlet pipe; 3-air pump cover; 4-air filter; 5-sealing gasket; 6-air valve group; 7-sealing gasket; 8-air pump seat; 9-air pump piston group; 10-crankshaft; 11-intake valve plate; 12-intake baffle; 13-exhaust limit block; 14-exhaust valve plate; 15-middle block; 16-air outlet; 17-water outlet; 18-air inlet; 19-air inlet; 20-water inlet; 21-air outlet; 22-water outlet; 23-piston movement chamber; 24-water inlet; 25-installation observation hole. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0027] A compressed air device for an air-assisted injection system, such as Figures 1 to 5As shown, it includes an air supply pipe 1, a water outlet pipe 2, an air pump cover 3, an air filter 4, a sealing gasket 5, an air valve group 6, a sealing gasket 7, an air pump seat 8, an air pump piston group 9 and a crankshaft 10; the upper part of the air pump cover 3 is respectively connected to the air supply pipe 1 and the water outlet pipe 2, the water outlet pipe 2 is connected to the radiator, the air filter 4 is installed on one side of the air pump cover 3, the air valve group 6 is sealed and installed below the air pump cover 3, the air valve group 6 is sealed and connected to the air pump seat 8, and the air pump piston group 9 and the crankshaft 10 are installed on the air pump seat 8, the crankshaft 10 drives the piston connecting rod group 9 to reciprocate in the piston motion chamber 23 of the air pump seat 8, and the water outlet 22 of the air pump seat 8 is connected to the water inlet 20 of the air pump cover 3.

[0028] This solution has the advantages of high air supply pressure, stable air pressure, flexible layout, good structural maintainability, etc. It has the characteristics of direct drive of the engine crankshaft. It not only solves the problems of poor fuel atomization quality and difficulty in ignition of the whole machine caused by low air-assisted diesel injection pressure, but also improves the reliability of the whole machine and makes the whole machine structure more compact.

[0029] The air pump cover 3 is provided with an air outlet 16, an air inlet 18, a water outlet 17, a water inlet 20, an air inlet 19, and an air outlet 21. The air outlet 16 is connected with the air outlet 21, and the air outlet 21 is connected with the air pipeline to provide compressed air to the air-assisted injection system; the air inlet 18 is connected with the air inlet 19, the water outlet 17 is connected with the water inlet 20, the water outlet is connected with the water outlet pipe 2 through a joint, and the water outlet pipe 2 is connected with the radiator to cool the system, reduce the influence of thermal stress on the device, and improve the reliability of the device; the air inlet 18 is installed with an air filter 4, and the air outlet 21 is connected with the air pipeline 1.

[0030] The air valve group 6 includes an intermediate block 15 and an exhaust limit block 13, an exhaust valve plate 14, an intake valve plate 11, and an intake baffle 12 installed above the intermediate block 15. The intermediate block 15 is provided with an intake duct and an exhaust duct. The exhaust valve plate 14 covers the upper side of the exhaust duct on the intermediate block 15, and the intake valve plate 11 covers the lower side of the intake duct on the intermediate block 15. The intake baffle 12 is located below the intake valve plate 11, and the exhaust limit block 13 is located above the exhaust valve plate 14. The exhaust limit block 13, the exhaust valve plate 14, the intake valve plate 11, and the intake baffle 12 are fixed to the intermediate block 15 by bolts or rivets. Since the diesel engine is coaxially connected to the compressed air device, the diesel engine has a high speed and the intake valve plate 11 and the exhaust valve plate 14 of the air pump are opened and closed once for each working cycle of the engine. The valve plate is subjected to a high frequency of alternating loads. Excessive valve plate opening will accelerate the failure of the valve plate structure. In order to prevent the intake valve plate 11 and the exhaust valve plate 14 from opening too wide, an intake baffle 12 is arranged under the intake valve plate 11 and an exhaust limit block 13 is arranged on the exhaust valve plate 14, so as to slow down the failure time of the valve plates and improve the reliability of the compressed air device.

[0031] The air pump seat 8 is provided with a water inlet 24, a water outlet 22, an installation observation hole 25, and a piston movement chamber 23. The water inlet 24 is connected to the water inlet pipe, and the water outlet 22 is communicated with the water inlet 20 of the air pump cover 3. The crankshaft 10 rotates, and the piston connecting rod assembly 9 reciprocates in the piston movement chamber 23. The installation observation hole 25 is used to observe and install the crankshaft and the piston connecting rod, and improve the maintainability of the device. The air pump seat 8 is provided with a water inlet 24, which can enter cooling water, and the water outlet 22 is communicated with the water inlet of the air pump cover. The water outlet hole 17 of the air pump cover is connected to the water outlet pipe 2, and the water outlet pipe 2 is connected to the radiator.

[0032] The air pump piston assembly 9 is composed of a piston, a piston pin, a connecting rod, etc. The air pump piston connecting rod is directly driven by the crankshaft 10 to compress air, thereby improving the compactness of the device.

[0033] The No. 1 sealing gasket 5 and the No. 2 sealing gasket 7 are respectively placed between the air valve group 6 and the air pump cover 3, and between the air valve group 6 and the air pump seat 8, which can seal water and air to ensure that the device has higher sealing performance.

[0034] The working principle of a compressed air device for an air-assisted injection system is as follows:

[0035] When the engine crankshaft rotates and the air pump piston group 9 moves downward, the intake valve plate 11 tilts up and the exhaust valve plate 14 closes, and the air enters the air pump cover 3 from the air filter 4, and enters the piston movement chamber 23 of the air pump seat from the gap between the intake duct of the middle block 15 and the intake valve plate 11. When the air pump piston group 9 moves upward, the intake valve plate 11 tilts up and the exhaust valve plate 14 opens, and the air in the piston movement chamber 23 enters the air pump cover 3 through the gap between the exhaust duct of the middle block 15 and the exhaust valve plate 14, and the compressed air is sent to the air-assisted injection system through the air delivery pipe 1.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressed air device for an air-assisted injection system, characterized in that: It includes an air pump cover and an air pipe and a water outlet pipe connected to the air pump cover, the water outlet pipe is connected to the radiator, an air filter is installed on one side of the air pump cover, an air valve group is sealed and installed below the air pump cover, the air valve group is sealed and connected to the air pump seat, and an air pump piston group and a crankshaft are installed on the air pump seat, the crankshaft drives the piston connecting rod group to reciprocate in the piston motion chamber of the air pump seat, and the water outlet of the air pump seat is connected to the water inlet of the air pump cover.

2. A compressed air device for an air-assisted injection system according to claim 1, characterized in that: The air pump cover is provided with an air outlet, an air inlet, a water outlet, a water inlet, an air inlet and an air outlet, the air outlet is communicated with the air outlet, and the air outlet is connected with an air pipeline to provide compressed air to the air-assisted injection system; The air inlet is connected with the air inlet, the water outlet is connected with the water inlet, the water outlet is connected with the water outlet pipe through a joint, an air filter is installed at the air inlet, and the air outlet is connected with the air pipe.

3. A compressed air device for an air-assisted injection system according to claim 1, characterized in that: The valve group includes a middle block and an exhaust valve sheet and an intake valve sheet installed above the middle block. The middle block is provided with an intake duct and an exhaust duct. The exhaust valve sheet covers the upper side of the exhaust duct on the middle block, and the intake valve sheet covers the lower side of the intake duct on the middle block.

4. A compressed air device for an air-assisted injection system according to claim 3, characterized in that: The air valve group also includes an exhaust limit block and an air intake baffle, the air intake baffle is located below the air intake valve plate, and the exhaust limit block is located above the exhaust valve plate.

5. A compressed air device for an air-assisted injection system according to claim 4, characterized in that: The exhaust limit block, the intake baffle, the exhaust valve plate and the intake valve plate are fixed on the middle block by bolts or rivets.

6. A compressed air device for an air-assisted injection system according to claim 2, characterized in that: The air pump seat is provided with a water inlet hole and a water outlet. The water inlet hole is connected to the water inlet pipe, and the water outlet is communicated with the water inlet of the air pump cover.

7. A compressed air device for an air-assisted injection system according to claim 1, characterized in that: The air pump seat is provided with an installation observation hole.

8. A compressed air device for an air-assisted injection system according to claim 1, characterized in that: The No. 1 sealing gasket and the No. 2 sealing gasket are respectively placed between the air valve group and the air pump cover, and between the air valve group and the air pump seat.

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