A split double-chamber high-pressure constant-volume combustion bomb

Abstract

The present invention discloses a split double-chamber high-pressure constant-volume incendiary bomb, comprising an incendiary bomb cavity and a pressure relief chamber cavity. Pressure relief devices are connected to the two sides of the incendiary bomb cavity, and a pressure relief main pipe is connected to the side of the pressure relief chamber cavity. Each pressure relief device is connected to the pressure relief main pipe through a pressure relief straight branch pipe. This high-pressure constant-volume incendiary bomb has pressure relief devices installed on both sides of the incendiary bomb cavity, and the pressure relief main pipe is connected to the pressure relief chamber cavity through the pressure relief devices symmetrically installed on both sides, which can effectively realize the heating of the incendiary bomb cavity, thereby providing more combustion data under high-pressure conditions. This invention is used in the field of constant-volume incendiary bomb technology.

Description

Technical Field

[0001] The invention relates to the technical field of constant volume combustion bombs for internal combustion engines, in particular to a split double-cavity high-pressure constant volume combustion bomb. Background Art

[0002] In combustion research, the design of the burner is very critical. A burner with excellent design can achieve the expected goals with a very simple design concept and operate reliably in a stable working state. Operators should be able to easily obtain experimental data from it.

[0003] The combustion process in actual combustion power devices is mostly a high-pressure combustion process. High-pressure combustion can enable the power device to achieve a higher compression ratio, so that a higher proportion of fuel chemical energy is converted into effective mechanical energy, thereby improving the combustion efficiency of the power device and reducing fuel consumption and greenhouse gas emissions. For internal combustion engines, the internal combustion pressure can reach more than 100atm.

[0004] In addition, the frequency of intermolecular collisions in high-pressure combustion is increased by an order of magnitude compared to normal pressure, which leads to a significant change in combustion characteristics. On the other hand, pressure changes in the actual combustion process will cause a considerable number of chemical reaction rates and branching ratios to change significantly. Some pressure-dependent reactions that are not important under low pressure and normal pressure can strongly affect the combustion process under high pressure. Therefore, a high-performance high-pressure combustion test device is designed to provide more high-pressure basic combustion data, which is conducive to improving the prediction accuracy of the high-pressure combustion model.

[0005] At present, there are very few experimental studies on dual-cavity high-pressure incendiary bombs in China. The dual-cavity incendiary bomb of the Law research group at Princeton University in the United States has two cavities, inner and outer. The combustible mixture is filled in the inner cavity, and the outer cavity is filled with inert gas. The pressure of the inner and outer cavities is equalized by mixing, so the experimental pressure can be very high. However, this dual-cavity structure is relatively complex, and the inner cavity cannot be directly heated, resulting in the research work on dual-cavity incendiary bombs focusing on normal temperature conditions. Therefore, designing a split dual-cavity high-pressure constant-volume incendiary bomb, that is, the split arrangement of the incendiary bomb cavity (inner cavity) and the pressure relief chamber cavity (outer cavity) is an important way to solve the difficulty of heating the integrated dual cavity, and it is also an effective way to improve the safety of experimental operations under high-pressure conditions. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a split dual-cavity high-pressure constant-volume combustion bomb that can effectively heat the combustion bomb cavity, thereby providing more combustion data under high-pressure conditions.

[0007] According to a first aspect of the present invention, there is provided a split-type dual-chamber high-pressure constant-volume combustion bomb, comprising a combustion bomb cavity and a pressure relief chamber cavity, wherein pressure relief devices are connected to the two side surfaces of the combustion bomb cavity, a pressure relief main pipe is provided connected to the side surface of the pressure relief chamber cavity, and each of the pressure relief devices is connected to the pressure relief main pipe via a pressure relief straight branch pipe.

[0008] This split double-chamber high-pressure constant-volume combustion bomb has pressure relief devices installed on both sides of the combustion bomb cavity. The pressure relief devices installed symmetrically on both sides are connected to the pressure relief main pipe until the pressure relief chamber cavity, which can effectively heat the combustion bomb cavity and provide more combustion data under high-pressure conditions.

[0009] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the pressure relief device includes a pressure relief connecting chamber connected to the combustion bomb cavity, a hollow pressure relief connecting hole is provided in the pressure relief connecting chamber, and a pressure relief sleeve is axially connected to the pressure relief connecting chamber, a hollow sliding chamber and an axially slidable pressure relief opening baffle are provided in the pressure relief sleeve, and the side wall of the pressure relief sleeve is also opened to connect a pressure relief pipe.

[0010] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the inner diameter of the pressure relief connecting hole is smaller than the outer diameter of the pressure relief opening baffle, the inner diameter of the pressure relief pipe is equal to the inner diameter of the pressure relief connecting hole, and the outer diameter of the pressure relief opening baffle is smaller than the inner diameter of the pressure relief sleeve.

[0011] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, two pipe tee joints are installed on the pressure relief main pipe, and a double-flange connecting pipe is connected to each of the pipe tee joints, and the other end of each double-flange connecting pipe is connected to the pressure relief pipe.

[0012] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the tail of the pressure relief opening baffle is connected to a linear bearing, a reset spring is provided between the pressure relief opening baffle and the bottom of the pressure relief sleeve, a countersunk hole is provided at the tail of the pressure relief sleeve, the linear bearing includes a bearing sleeve fixedly installed in the pressure relief sleeve and a bearing rod fixedly connected to the tail of the pressure relief opening baffle, the bearing rod is embedded in the bearing sleeve and slides along the bearing sleeve, and the reset spring is arranged around the outer contour of the bearing sleeve.

[0013] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, both ends of the combustion bomb cavity are provided with combustion bomb end covers that close the cavity, and each of the combustion bomb end covers is fixed by a number of fastening bolts screwed into the outer contours of the two ends of the combustion bomb cavity.

[0014] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the two pressure relief devices are symmetrically arranged on the two side walls of the combustion bomb cavity, and the two pressure relief connection holes are arranged opposite to each other and are located on the same axis.

[0015] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the two straight pressure relief pipes are installed perpendicular to the axis of the pressure relief connecting hole, and the main pressure relief pipe is arranged parallel to the axis of the two pressure relief connecting holes.

[0016] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, at least two continuous bending sections are provided on the end of the pressure relief main pipe connected to the pressure relief chamber cavity, and the two bending sections are perpendicular to each other, and both of the bending sections are arranged perpendicular to the pressure relief main pipe.

[0017] According to the split double-chamber high-pressure constant-volume combustion bomb described in the embodiment of the first aspect of the present invention, the bending section at the end of the pressure relief main pipe is connected to an end flange, the side of the pressure relief main pipe is connected to a side wall connecting pipe, and the end of the side wall connecting pipe is provided with a side wall connecting flange fixedly connected to the end flange by fastening bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 It is a top view of the overall structure of an embodiment of the present invention;

[0020] Figure 2 It is a side view of the overall structure of an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure decomposition of the pressure relief device in an embodiment of the present invention;

[0022] Figure 4 It is a cross-sectional schematic diagram of the connection structure between the pressure relief device and the combustion bomb cavity in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 1 to Figure 4 , provides a split double-chamber high-pressure constant-volume combustion bomb, including a combustion bomb cavity 10 and a pressure relief chamber cavity 20, the two sides of the combustion bomb cavity 10 are connected with pressure relief devices 30, and a pressure relief main pipe 40 is connected to the side of the pressure relief chamber cavity 20, and each pressure relief device 30 is connected to the pressure relief main pipe 40 through a pressure relief straight branch pipe 50.

[0028] This split double-chamber high-pressure constant-volume combustion bomb has pressure relief devices 30 installed on both sides of the combustion bomb cavity 10. The pressure relief devices 30 installed symmetrically on both sides are connected to the pressure relief main pipe 40 until the pressure relief chamber cavity 20, which can effectively achieve the heating of the combustion bomb cavity 10, thereby providing more combustion data under high-pressure conditions.

[0029] In some of the embodiments, the pressure relief device 30 includes a pressure relief connecting chamber 31 connected to the combustion bomb cavity 10, a hollow pressure relief connecting hole 311 is provided in the pressure relief connecting chamber 31, a pressure relief sleeve 32 axially connected to the pressure relief connecting chamber 31, a hollow sliding chamber and an axially slidable pressure relief opening baffle 33 are provided in the pressure relief sleeve 32, and the side wall of the pressure relief sleeve 32 is also opened to connect a pressure relief pipe 34.

[0030] In some of the embodiments, the inner diameter of the pressure relief connection hole 311 is smaller than the outer diameter of the pressure relief opening baffle 33 , the inner diameter of the pressure relief pipe 34 is equal to the inner diameter of the pressure relief connection hole 311 , and the outer diameter of the pressure relief opening baffle 33 is smaller than the inner diameter of the pressure relief sleeve 32 .

[0031] In some of the embodiments, two pipe tee joints 41 are installed on the pressure relief main pipe 40 , and a double flange connection pipe 51 is connected to each pipe tee joint 41 , and the other end of each double flange connection pipe 51 is connected to the pressure relief pipe 34 .

[0032] In some of the embodiments, the tail of the pressure relief opening baffle 33 is connected to a linear bearing, a reset spring 35 is provided between the pressure relief opening baffle 33 and the bottom of the pressure relief sleeve 32, a countersunk hole is provided at the tail of the pressure relief sleeve 32, and the linear bearing includes a bearing sleeve 36 fixedly installed in the pressure relief sleeve 32 and a bearing rod 37 fixedly connected to the tail of the pressure relief opening baffle 33, the bearing rod 37 is embedded in the bearing sleeve 36 and slides along the bearing sleeve 36, and the reset spring 35 is arranged around the outer contour of the bearing sleeve 36.

[0033] In some of the embodiments, both ends of the combustion bomb cavity 10 are provided with combustion bomb end covers 11 for closing the cavity, and each combustion bomb end cover 11 is fixed by a plurality of fastening bolts screwed into the outer contours of both ends of the combustion bomb cavity 10 .

[0034] In some of the embodiments, the two pressure relief devices 30 are symmetrically arranged on the two side walls of the combustion bomb cavity 10, and the two pressure relief connection holes 311 are arranged opposite to each other and are located on the same axis.

[0035] In some of the embodiments, the two straight pressure relief pipes 50 are installed perpendicular to the axis of the pressure relief connection hole 311 , and the main pressure relief pipe 40 is arranged parallel to the axis of the two pressure relief connection holes 311 .

[0036] In some of the embodiments, at least two continuous bending sections are provided on one end of the pressure relief main pipe 40 connected to the pressure relief chamber cavity 20 . The two bending sections are perpendicular to each other and are both arranged perpendicular to the pressure relief main pipe 40 .

[0037] In some of the embodiments, the bending section at the end of the pressure relief main pipe 40 is connected to an end flange, the side of the pressure relief main pipe 40 is connected to a side wall connecting pipe, and the end of the side wall connecting pipe is provided with a side wall connecting flange fixedly connected to the end flange by fastening bolts.

[0038] The present invention discloses an experimental device of a split double-cavity high-pressure constant-volume combustion bomb based on a pressure relief device, which is mainly composed of a combustion bomb end cover 11, a combustion bomb cavity 10, a pressure relief device 30, a pressure relief chamber cavity 20, a pressure relief chamber end cover 21, and a cavity pressure relief connecting pipe, wherein the cavity pressure relief connecting pipe mainly includes a pressure relief main pipe 40, a pipe three-way joint 41, a pressure relief straight branch pipe 50, etc.

[0039] The combustion bomb end cover 11 and the pressure relief chamber end cover 21 are fixed to the combustion bomb cavity 10 and the pressure relief chamber cavity 20 through radially evenly distributed mounting holes. The pressure relief device 30 is mainly composed of a pressure relief connecting cavity 31, a pressure relief sleeve 32, a pressure relief pipe 34 and bolts for fixing the pressure relief sleeve 32 and the pressure relief connecting cavity 31; the pressure relief device 30 is horizontally arranged on both sides of the combustion bomb cavity 10, wherein the pressure relief hole of the pressure relief connecting cavity 31 is aligned and fixed with the pressure relief hole of the combustion bomb, the pressure relief sleeve 32 is fixed to the pressure relief connecting cavity 31 by evenly distributed fixing bolts, a sealing groove is opened on the end surface where the pressure relief connecting cavity 31 contacts the pressure relief sleeve 32, and a pressure relief opening device is arranged in the inner cavity of the pressure relief sleeve 32. When the pressure relief device 30 is opened, the gas in the combustion bomb cavity 10 will be discharged from the pressure relief pipe 34.

[0040] One end flange of the double-flange connection pipe 51 is connected and fixed to the flange of the pressure relief pipe 34, and the other end flange is connected and fixed to the flange of the single-flange connection pipe, and sealing grooves are provided on the contact end surfaces between the flanges.

[0041] The other end of the single flange connecting pipe is connected to the inlet end of the pipe tee joint 41, and a horizontal straight pipe is connected between the two pipe tee joints 41. This part of the horizontal straight pipe is a pressure relief main pipe 40 connected to the pressure relief chamber cavity 20. The outlet end of one of the pipe tee joints 41 is connected and fixed to the pressure relief chamber main pipe, and the outlet end of the other pipe tee joint 41 is sealed with a plug.

[0042] The flange at the other end of the bent section on the pressure relief main pipe 40 is connected and fixed to the flange of the inlet pipe of the pressure relief chamber cavity 20, and the contact end surfaces of the flanges are all provided with sealing grooves.

[0043] The inlet pipe of the pressure relief chamber cavity 20 is fixed to the side of the pressure relief chamber cavity 20, and the pressure relief chamber end cover 21 is threadedly connected to the pressure relief chamber cavity 20 through evenly distributed mounting holes.

[0044] The manufacturing and assembly steps of the split high-pressure constant-volume combustion bomb experimental device based on the pressure relief device 30 are as follows:

[0045] Step 1: Use 304 stainless steel to process the combustion bomb cavity 10 and the combustion bomb end cover 11, the pressure relief chamber cavity 20 and the combustion chamber end cover, the pressure relief device 30 and the cavity pressure relief connecting pipe and ensure the processing accuracy of each component, and ensure that the roughness of each sealing surface is 3.2μm;

[0046] Step 2: Connect the end cover 11 of the incendiary bomb to the incendiary bomb cavity 10 by threaded connection using external hexagonal bolts through radially evenly distributed mounting holes. Tighten the mounting bolts in a symmetrical order so that the end cover 11 of the incendiary bomb is evenly stressed. An O-ring is used to seal the end cover 11 of the incendiary bomb and the incendiary bomb cavity 10.

[0047] Step 3: Align the pressure relief hole position of the pressure relief connection chamber 31 according to the pressure relief hole position of the incendiary bomb cavity 10 and weld the pressure relief connection chamber 31 and the incendiary bomb cavity 10 together, and polish the welded part to be smooth. After installing the pressure relief opening device in the inner cavity of the pressure relief sleeve 32, use bolts to thread the pressure relief sleeve 32 and the pressure relief connection chamber 31 through the radially evenly distributed mounting holes. When installing the pressure relief sleeves 32 on both sides horizontally, ensure that the installation angles of the pressure relief pipes 34 are consistent;

[0048] Step 4: The flange at one end of the double-flange connection pipe 51 is connected and fixed to the flange of the pressure relief pipe 34 by bolts and nuts, and the pipe tee joint 41 is fixed to both ends of the horizontal pipe by threaded pairs in turn, and then the threaded pipe end of the single-flange connection pipe is connected to the pipe tee joint 41 by threaded pairs, and finally the flange of the flange connection pipe is connected to the flange of the pressure relief pipe 34 by bolts and nuts;

[0049] Step 5: The threaded pipe end of the elbow is connected to a pipe tee joint 41 through a threaded pair, the outlet of the other pipe tee joint 41 is blocked with a threaded plug, the pressure relief chamber inlet pipe flange of the pressure relief chamber cavity 20 is connected to the flange at the other end of the elbow through bolts and nuts, and finally the pressure relief chamber end cover 21 is connected to the pressure relief chamber cavity 20 provided with evenly distributed mounting holes by using external hexagonal bolts for threaded pair connection, and a symmetrical order is adopted when tightening the mounting bolts so that the pressure relief chamber end cover 21 is evenly stressed.

[0050] The end faces of each flange and the end face of the pressure relief connection cavity 31 are processed with sealing rectangular grooves, whose diameters are 40mm and 84mm respectively. The width is 7mm and the depth is 4mm. According to the size of the groove, O-rings with diameters of 40mm and 84mm are selected and placed in the rectangular grooves, and the material of the O-rings is perfluoroether rubber. Among them, the O-rings need to be replaced regularly to prevent aging and leakage.

[0051] The pipes connected by threaded pairs are sealed with raw tape, and the seals between the end covers and the cavities are sealed with O-rings.

[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A split double-chamber high-pressure constant-volume combustion bomb, characterized in that: It includes an incendiary bomb cavity and a pressure relief chamber cavity, the two sides of the incendiary bomb cavity are connected with pressure relief devices, and a pressure relief main pipe is connected to the side of the pressure relief chamber cavity, and each of the pressure relief devices is connected to the pressure relief main pipe through a pressure relief straight branch pipe; The pressure relief device comprises a pressure relief connection cavity connected to the combustion bomb cavity, a hollow pressure relief connection hole is arranged in the pressure relief connection cavity, a pressure relief sleeve is axially connected to the pressure relief connection cavity, a hollow sliding cavity and an axially slidable pressure relief opening baffle are arranged in the pressure relief sleeve, and a hole is also opened in the side wall of the pressure relief sleeve to connect a pressure relief pipeline; Both ends of the combustion bomb cavity are provided with combustion bomb end covers which close the cavity, and each of the combustion bomb end covers is fixed by a plurality of fastening bolts which are screwed into the outer contours of both ends of the combustion bomb cavity.

2. The split double-chamber high-pressure constant-volume combustion bomb according to claim 1 is characterized in that: The inner diameter of the pressure relief connection hole is smaller than the outer diameter of the pressure relief opening baffle, the inner diameter of the pressure relief pipeline is equal to the inner diameter of the pressure relief connection hole, and the outer diameter of the pressure relief opening baffle is smaller than the inner diameter of the pressure relief sleeve.

3. The split double-chamber high-pressure constant-volume combustion bomb according to claim 1 is characterized in that: Two pipe tee joints are installed on the pressure relief main pipe, and a double flange connection pipe is connected to each of the pipe tee joints, and the other end of each double flange connection pipe is connected to the pressure relief pipe.

4. The split double-chamber high-pressure constant-volume combustion bomb according to claim 1 is characterized in that: The tail of the pressure relief opening baffle is connected to a linear bearing, a reset spring is provided between the pressure relief opening baffle and the bottom of the pressure relief sleeve, a countersunk hole is provided at the tail of the pressure relief sleeve, the linear bearing includes a bearing sleeve fixedly installed in the pressure relief sleeve and a bearing rod fixedly connected to the tail of the pressure relief opening baffle, the bearing rod is embedded in the bearing sleeve and slides along the bearing sleeve, and the reset spring is arranged around the outer contour of the bearing sleeve.

5. The split double-chamber high-pressure constant-volume combustion bomb according to claim 1 is characterized in that: The two pressure relief devices are symmetrically arranged on the two side walls of the combustion bomb cavity, and the two pressure relief connection holes are arranged opposite to each other and are located on the same axis.

6. The split double-chamber high-pressure constant-volume combustion bomb according to claim 1 is characterized in that: The two pressure relief straight branch pipes are installed perpendicular to the axis of the pressure relief connecting hole, and the pressure relief main pipe is arranged parallel to the axis of the two pressure relief connecting holes.

7. The split double-chamber high-pressure constant-volume combustion bomb according to claim 6 is characterized in that: One end of the pressure relief main pipe connected to the pressure relief chamber cavity is provided with at least two continuous bending sections, the two bending sections are perpendicular to each other, and the two bending sections are both arranged perpendicular to the pressure relief main pipe.

8. The split double-chamber high-pressure constant-volume combustion bomb according to claim 7 is characterized in that: The bent section at the upper end of the pressure relief main pipe is connected to an end flange, the side of the pressure relief main pipe is connected to a side wall connecting pipe, and the end of the side wall connecting pipe is provided with a side wall connecting flange fixedly connected to the end flange by fastening bolts.

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