CN212563480U - Light quick mounting and connecting structure of engine - Google Patents
Light quick mounting and connecting structure of engine Download PDFInfo
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- CN212563480U CN212563480U CN202020205078.8U CN202020205078U CN212563480U CN 212563480 U CN212563480 U CN 212563480U CN 202020205078 U CN202020205078 U CN 202020205078U CN 212563480 U CN212563480 U CN 212563480U
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Abstract
The application provides quick erection joint structure of engine light, including engine housing, the top cap, locating piece and screw, wherein there is the cooperation groove along the even design of circumference on the engine housing, every cooperation groove divide into the load groove on the circumference in proper order, open slot and hoop groove, the design has the load piece of the same quantity that corresponds with the load groove of engine housing on the top cap, the bottom in the load groove of engine housing and the bottom of the load piece of top cap are the butt joint reference surface, the locating piece is "Z" style of calligraphy structure, install in engine housing's open slot, wherein the lower extreme side of locating piece compresses tightly the load piece of top cap in the load groove that engine housing corresponds. The top surface of the upper end of the positioning block is fixed in an annular groove of the engine shell through a screw, and the positioning block is fixedly connected with the engine shell; the engine reduces the flange structure by embedding the bearing block of the top cover into the bearing groove of the shell, and realizes the light structure.
Description
Technical Field
The utility model relates to a connection structure of quick installation of engine light belongs to solid rocket engine technical field for the connection of engine head and the fixed body is applicable to the quick erection joint of engine light of small-size low pressure work.
Background
The solid rocket engine connecting structure is a butt joint sealing device of a shell and a top cover, the common connecting structure has a flange connecting mode and a thread connecting mode, the flange connecting mode has the main characteristics of high strength and good sealing performance, the mounting mode is that a butt joint surface on the shell and a butt joint surface on the top cover are aligned, and a pretightening force with certain moment is applied to fix the butt joint surfaces through a plurality of screws, but when the solid rocket engine connecting structure is used for mounting an engine, the sealing surface is required to be flat, meanwhile, because the structural strength requirements of the thread holes and the through holes are designed and processed on the butt joint surfaces, the butt joint surface structure is usually thicker, so that the quality of the; the threaded connection mode is mainly characterized by small overall dimension and convenient realization of self-locking; the mounting mode is that the internal thread on the shell and the external thread on the top cover (or the external thread on the shell and the internal thread on the top cover) are aligned, the top cover is rotated clockwise (or anticlockwise) and screwed, large axial pretightening force is generated during screwing, sealing is facilitated, but the connection strength is considered, the number of turns of threaded connection is large, and when the mounting mode is applied to an engine, the quality of a connection structure is also large.
Disclosure of Invention
The utility model aims at: the defects of the prior art are overcome, and the light-weight quick mounting and connecting method is provided, so that the quick mounting and connecting of the shell and the top cover of the engine are realized, and the method is suitable for small-sized engines working at low pressure.
The technical solution of the utility model is that:
a light and quick mounting and connecting structure of an engine comprises an engine shell (1), a top cover (2), positioning blocks (3) and screws (4), wherein matching grooves are uniformly designed on the engine shell (1) along the circumference, each matching groove is sequentially divided into a force bearing groove (11), an open groove (12) and a circumferential groove (13) along the circumference, the top cover (2) is provided with force bearing blocks (21) with the same number corresponding to the force bearing grooves (11) of the engine shell (1), the bottom of the force bearing groove (11) of the engine shell (1) and the bottom of the force bearing block (21) of the top cover (2) are butt joint datum planes, the positioning blocks (3) are Z-shaped structural members and are mounted in the open grooves (12) of the engine shell (1), wherein the force bearing blocks (21) of the top cover (2) are tightly pressed in the force bearing grooves (11) corresponding to the engine shell (1) by the side surfaces of the lower ends of the positioning blocks (3), the force bearing block (21) of the top cover (2) is prevented from rotating in the force bearing groove (11) of the engine shell (1); the top surface of the upper end of the positioning block (3) is fixed in an annular groove (13) of the engine shell (1) through a screw (4), and the positioning block (3) is fixedly connected with the engine shell (1); the engine shell (1) and the top cover (2) are designed in an indexing force bearing mode of a flange structure, and the flange structure is reduced and the structure is lightened by utilizing a mode that a force bearing block (21) of the top cover (2) is embedded into a force bearing groove (11) of the engine shell (1);
the indexing force bearing mode comprises the determination of the number and the angle of the matching grooves of the engine shell (1), and the determination comprises the following steps: the number of the matching grooves is N = ▏ k (pi RP)/sigma ▏, wherein ▏ ▏ is an integral sign, k is a dimensionless coefficient, the value is taken according to the material and the working pressure of the engine shell (1), the value ranges from 1.7 to 4.6, P is the working pressure of the engine, sigma is the allowable stress of the material, and R is the inner radius of the matching grooves of the engine shell (1); mating groove angle theta1= ▏360/N-θ0 ▏, wherein theta0The initial angle is selected according to the material and the working pressure of the engine shell (1), and the value range is 4-15 degrees;
the positioning block (3) is formed by processing a forged piece metal, and is 30CrMnSiA or D406A.
The left side surface of the bearing block (21) is a first butt joint surface (22) between the top cover (2) and the engine shell (1), and the right side surface of the bearing block (21) is a second butt joint surface (23) between the top cover (2) and the positioning block (3);
the left side surface of locating piece (3) be butt joint tang surface (31) for connect top cap (2) and engine housing (1), the right-hand member hole of locating piece (3) is installation locating hole (32), is used for connecting engine housing (1) and locating piece (3) through screw (4).
Compared with the prior art, the utility model the advantage lie in:
(1) compared with a flange connection structure, the structure is compact and the weight is light; the design utilizes the indexing force bearing mode, so that the thickness and the mass of the structure are reduced;
(2) compared with a threaded connection structure, the structure is quick and convenient to install and connect; when the engine shell is installed and connected, the bearing block on the top cover corresponds to the open slot on the engine shell, is pushed to the butt joint reference surface of the matching slot of the engine shell, and then is rotated by a certain angle to the in-place surface.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and embodiments;
FIG. 1 is a schematic view of a lightweight quick-mount connection structure for an engine according to the present invention;
FIG. 2 is a structural diagram of an engine case of the connection structure of the present invention;
FIG. 3 is a top cover structure view of the connection structure of the present invention;
fig. 4 is a structure diagram of a positioning block of the connection structure of the present invention;
FIG. 5 is a view of the assembly structure of the engine case and the top cover of the connection structure of the present invention;
FIG. 6 is a view of the connection structure of the present invention showing the structure of assembling the engine case, the top cover, the positioning block and the screws;
fig. 7 is a sectional view of the connecting structure of the present invention after the engine housing, the top cover, the positioning block and the screws are assembled;
fig. 8 is a top view structural diagram of an engine case of the connection structure of the present invention;
fig. 9 is an end view of the engine case of the connection structure of the present invention.
Detailed Description
As shown in figures 1 and 2, the light-weight quick mounting and connecting structure of the engine comprises an engine shell (1), a top cover (2), a positioning block (3) and screws (4), wherein matching grooves are uniformly designed on the engine shell (1) along the circumference, each matching groove is sequentially divided into a force bearing groove (11), an open groove (12) and a circumferential groove (13) along the circumference, force bearing blocks (21) with the same number corresponding to the force bearing grooves (11) of the engine shell (1) are designed on the top cover (2), the bottom of the force bearing groove (11) of the engine shell (1) and the bottom of the force bearing blocks (21) of the top cover (2) are butt joint datum planes, the positioning block (3) is a Z-shaped structural member and is mounted in the open groove (12) of the engine shell (1), wherein the force bearing blocks (21) of the top cover (2) are tightly pressed in the force bearing grooves (11) corresponding to the engine shell (1) by the lower end side face of the positioning block (3), the force bearing block (21) of the top cover (2) is prevented from rotating in the force bearing groove (11) of the engine shell (1); the top surface of the upper end of the positioning block (3) is fixed in an annular groove (13) of the engine shell (1) through a screw (4), and the positioning block (3) is fixedly connected with the engine shell (1); the engine shell (1) and the top cover (2) are designed in an indexing force bearing mode of a flange structure, and the flange structure is reduced and the structure is lightened by utilizing a mode that a force bearing block (21) of the top cover (2) is embedded into a force bearing groove (11) of the engine shell (1);
the positioning block (3) is formed by processing a forged piece metal, and is 30CrMnSiA or D406A.
The left side surface of the bearing block (21) is a first butt joint surface (22) between the top cover (2) and the engine shell (1), and the right side surface of the bearing block (21) is a second butt joint surface (23) between the top cover (2) and the positioning block (3);
as shown in fig. 4, the left side surface of the positioning block (3) is a butt seam allowance surface (31) for connecting the top cover (2) and the engine housing (1), and the right side hole of the positioning block (3) is a mounting positioning hole (32) for connecting the engine housing (1) and the positioning block (3) by a screw (4);
the utility model adopts the indexing force-bearing structure, which can reduce the mass and realize quick installation; the engine shell (1) is provided with a plurality of matching grooves, each matching groove comprises a bearing groove (11), an open groove (12) and a circumferential groove (13), the lower surface of each bearing groove (11) is a butt joint datum plane, and the upper surface of each bearing groove is a bearing structure plane; when the mounting and connecting device is mounted and connected, the bearing block (21) on the top cover (2) is placed in a way of corresponding to the open slot (12) on the engine shell (1), and then the bearing block is rotated by a certain angle and pushed into the bearing slot (11) of the engine shell (1), as shown in figure 5; then, the positioning block (3) is placed in an opening groove (12) of the engine shell (1), and then the lower end side face of the positioning block (3) presses a bearing block (21) of the top cover (2) in a corresponding bearing groove (11) of the engine shell (1), so that the top cover (2) and the engine shell (1) are fixed by a butt joint surface (31), and the bearing block (21) of the top cover (2) is prevented from rotating in the bearing groove (11) of the engine shell (1); the top surface of the upper end of the positioning block (3) is fixed in the circumferential groove (13) of the engine shell (1) through the screw (4), so that the mounting positioning hole (32) can fixedly connect the engine shell (1) and the positioning block (3) through the screw (4), as shown in fig. 6 and 7. Wherein, fig. 7 clearly shows the installation position of the bearing block (21) of the top cover (2) in the bearing groove (11) on the engine shell (1), and the connection relationship between the positioning block (3) and the screw (4) and the engine shell (1);
the flange structure of the indexing force-bearing mode of the utility model is shown in fig. 8 and fig. 9, when in connection and installation, only the engine shell (1) and the top cover (2) are required to be aligned, and the rotation theta is adjusted3The angle of the mounting bracket is only needed, so that the rapid mounting is realized;
the utility model discloses quantity N in graduation load mode cooperation groove is relevant with flange's radius R:
n = ▏ k (pi RP)/sigma ▏, wherein k is a dimensionless constant and takes a value of 1.7-4.6; … … … … … … … (1)
In the formula, P is the working pressure of the engine, and sigma is the allowable stress of the material;
mating groove angle theta1In relation to the number N of mating grooves:
θ1= ▏360/N-θ0 ▏，θ0the value is 4-15 degrees; … … … … … … … … … … … … … … (2)
Wherein, the definition of each angle is as follows: theta1The matching groove angle of the engine shell (1) is related to the number N of the matching grooves and is determined by a formula (2); theta2The bearing groove angle on the engine shell (1), the number N of the matching grooves and the matching groove angle theta1Correlation; theta3The angle of an opening groove on the engine shell (1), the number N of matching grooves and the angle theta of the matching grooves1Correlation;
the utility model discloses in, the parameter value of graduation load mode follows the minimum principle of engine housing structure stress, does: when the inner radius of the matching groove of the engine shell (1) is within the range of 100 mm-200 mm, the number of the matching grooves is 8, and the angle theta of the matching groove is1The range of the angle is 30-36 degrees, and the angle theta of the bearing groove2The range of (1) is 14-16 DEG, and the opening groove angle theta3The range of (A) is 10-12 degrees; when the inner radius of the matching groove of the engine shell (1) is within the range of 200 mm-300 mm, the number of the matching grooves is 10, and the angle theta of the matching groove is1The range of the angle is 25-28 degrees, and the angle theta of the bearing groove2The range of (1) is 12-14 DEG, and the opening groove angle theta3The range of (A) is 8-10 degrees; when the inner radius of the matching groove of the engine shell (1) is 300 mm-400 mm, the number of the matching grooves is 12, and the angle theta of the matching groove is1The range of the angle is 20-24 degrees, and the angle theta of the bearing groove2The range of (1) is 10-12 degrees, and the angle theta of the open slot3The range of (A) is 6-8 degrees; when the inner radius of the matching groove of the engine shell (1) is within the range of 400 mm-500 mm, the number of the matching grooves is 16, and the angle theta of the matching groove is1The range of the angle is 15-18 degrees, and the angle theta of the bearing groove2The range of (1) is 7-9 degrees, and the angle theta of the open slot3The range of (1) is 5-7 degrees; when the inner radius of the matching groove of the engine shell (1) is within the range of 500 mm-600 mm, the number of the matching grooves is 18, and the angle theta of the matching groove is1The range of the angle is 12 degrees to 16 degrees, and the angle theta of the bearing groove2The range of (a) is 6-8 DEG, and the opening groove angle theta3The range of (A) is 4-6 degrees; specific structural parameters are shown in table 1;
TABLE 1 connection structure parameters of indexing force-bearing mode
| Item | Butt radius R (mm) | Number of fitting grooves N | Mating groove angle theta1（°） | Bearing groove angle theta2（°） | Open slot angle θ3（°） |
| 1 | 100 ~ 200 | 8 | 30°~ 36° | 14°~ 16° | 10°~ 12° |
| 2 | 200 ~ 300 | 10 | 25°~ 28° | 12°~ 14° | 8°~ 10° |
| 3 | 300 ~ 400 | 12 | 20°~ 24° | 10°~ 12° | 6°~ 8° |
| 4 | 400 ~ 500 | 16 | 15°~ 18° | 7°~ 9° | 5°~ 7° |
| 5 | 500 ~ 600 | 18 | 12°~ 16° | 6°~ 8° | 4°~ 6° |
In the embodiment, the working pressure of the engine is 6.0MPa, the allowable material stress is 1080MPa, the inner radius R of a matching groove of the engine shell (1) is 192mm, the number N of the matching grooves is 8, and the initial angle theta of a bearing structure0Is at an angle of 11 degrees,to match the slot angle theta1Is 34 degrees, and the angle theta of the bearing groove2Is 16 degrees, and the opening groove angle theta3At 12 deg., as shown in fig. 8 and 9;
in this embodiment, as shown in fig. 3, 8 corresponding bearing blocks (21) are designed and processed on the top cover (2), the left side surface of the bearing block (21) is a first top cover butting surface (22), and when the bearing block (21) on the top cover (2) is placed in an opening groove (12) on the engine housing (1) and then rotated by 16 degrees (theta)2) The operation can be completed;
compared with a flange connection structure, the utility model has compact structure and light weight, which is lighter than the flange connection structure by more than 10% under the same condition; compared with a threaded connection structure, the utility model has the advantages that the installation and connection are rapid and convenient;
details not described in the present specification belong to the prior art known to those skilled in the art.
Claims (5)
1. The utility model provides a quick erection joint structure of engine light which characterized in that: comprises an engine shell (1), a top cover (2), a positioning block (3) and a screw (4), wherein the engine shell (1) is uniformly provided with matching grooves along the circumference, each matching groove is sequentially divided into a force bearing groove (11), an open groove (12) and a circumferential groove (13) along the circumference, the top cover (2) is provided with force bearing blocks (21) which correspond to the force bearing grooves (11) of the engine shell (1) and have the same number, the bottom of the force bearing groove (11) of the engine shell (1) and the bottom of the force bearing block (21) of the top cover (2) are butt joint reference surfaces, the positioning block (3) is a Z-shaped structural member and is arranged in the open groove (12) of the engine shell (1), wherein the lower end side surface of the positioning block (3) presses the bearing block (21) of the top cover (2) in the corresponding bearing groove (11) of the engine shell (1), the force bearing block (21) of the top cover (2) is prevented from rotating in the force bearing groove (11) of the engine shell (1); the top surface of the upper end of the positioning block (3) is fixed in an annular groove (13) of the engine shell (1) through a screw (4), and the positioning block (3) is fixedly connected with the engine shell (1); the engine shell (1) and the top cover (2) are designed in an indexing force bearing mode of a flange structure, and the flange structure is reduced and the structure is lightened by utilizing a mode that a force bearing block (21) of the top cover (2) is embedded into a force bearing groove (11) of the engine shell (1).
2. The engine light weight quick mount connection structure of claim 1, wherein: the indexing force bearing mode comprises the determination of the number and the angle of the matching grooves of the engine shell (1), and the determination comprises the following steps: the number of the matching grooves is N = ▏ k (pi RP)/sigma ▏, wherein ▏ ▏ is an integral sign, k is a dimensionless coefficient, the value is taken according to the material and the working pressure of the engine shell (1), the value ranges from 1.7 to 4.6, P is the working pressure of the engine, sigma is the allowable stress of the material, and R is the inner radius of the matching grooves of the engine shell (1); mating groove angle theta1= ▏360/N-θ0 ▏, wherein theta0The initial angle is selected according to the material and the working pressure of the engine shell (1), and the value range is 4-15 degrees.
3. The engine light weight quick mount connection structure of claim 1, wherein: the positioning block (3) is formed by processing a forged piece metal, and is 30CrMnSiA or D406A.
4. The engine light weight quick mount connection structure of claim 1, wherein: the left side surface of the bearing block (21) is a first butt joint surface (22) between the top cover (2) and the engine shell (1), and the right side surface of the bearing block (21) is a second butt joint surface (23) between the top cover (2) and the positioning block (3).
5. The engine light weight quick mount connection structure of claim 1, wherein: the left side surface of locating piece (3) be butt joint tang surface (31) for connect top cap (2) and engine housing (1), the right-hand member hole of locating piece (3) is installation locating hole (32), is used for connecting engine housing (1) and locating piece (3) through screw (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020205078.8U CN212563480U (en) | 2020-02-25 | 2020-02-25 | Light quick mounting and connecting structure of engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020205078.8U CN212563480U (en) | 2020-02-25 | 2020-02-25 | Light quick mounting and connecting structure of engine |
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| CN212563480U true CN212563480U (en) | 2021-02-19 |
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| CN202020205078.8U Active CN212563480U (en) | 2020-02-25 | 2020-02-25 | Light quick mounting and connecting structure of engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738536A (en) * | 2021-08-27 | 2021-12-03 | 北京航天动力研究所 | Integrated force-bearing flow-equalizing top cover device |
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2020
- 2020-02-25 CN CN202020205078.8U patent/CN212563480U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113738536A (en) * | 2021-08-27 | 2021-12-03 | 北京航天动力研究所 | Integrated force-bearing flow-equalizing top cover device |
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