Recycling type rocket sled sliding shoe seat type sliding shoe structure

Abstract

The invention discloses a sliding shoe seat type sliding shoe structure of a recovery type rocket sled. The sliding shoe seat type sliding shoe structure comprises a connecting plate, a sliding shoe seat, a shoe body, a sliding block, a baffle, a pin shaft, a key and a bolt. Through holes are formed in two sides of the connecting plate, one side of the connecting plate is welded on the skid body chassis, and a key groove is milled in the center of the other side of the connecting plate and connected with the sliding shoe seat through keys and bolts; the sliding shoe seat is of a pi-shaped structure, the upper half portion of the sliding shoe seat is provided with a key groove and a threaded hole which are used for connection, the lower half portion of the sliding shoe seat limits lateral displacement of the shoe body, is connected with the shoe body through a pin shaft, limits vertical and course displacement of the shoe body and enables the shoe body to have a certain rotation range, and a skid body can conveniently pass through an arc-shaped track. A groove and a threaded hole are designed in the shoe body and used for installing a sliding block, and a baffle is installed at the tail of the shoe body to limit the sliding shoe to move. And the shoe body is matched with the rail to limit the skid body to move along the rail. The device can be recycled, is convenient to replace, can effectively bear impact and overload of a skid body and a track during movement, and is suitable for tracks such as a straight track and an arc track.

Description

Technical Field

[0001] The invention belongs to the technical field of rocket testing, and in particular relates to a recovery type rocket sled slide shoe seat type slide shoe structure. Background Art

[0002] The rocket sled test is a large-scale, high-precision ground simulation test system developed in the mid-to-late 20th century. It can simulate the dynamic environment of aircraft, missiles, aerospace vehicles and other test objects during flight. It is powered by a rocket engine, glides at high speed along a dedicated track, and can use a special brake device to complete the non-destructive recovery of the test object. The rocket sled test reaches certain speeds, accelerations, vibration overloads and other conditions according to the test requirements of the test object, and realizes the performance assessment of the test object's structural strength, charge stability, penetration capability and other performance.

[0003] The sled structure of a recoverable rocket sled generally includes a skid, chassis, column as a whole, engine clamp, brake device and other structures. Among them, the skid is an important component for the cooperation between the sled and the track. Its function is to control and limit the vertical displacement of the rocket sled along the side of the slide rail, so that the sled moves smoothly along the track. Since the test speed of the recoverable rocket sled is mostly subsonic, the movement environment of the sled is relatively good, and most structures have a small deformation after the test, which can be reused, and the preparation time between multiple tests is short. However, the skid directly bears the impact and friction between the sled and the track during the movement of the sled. The wear deformation of the skid after the test is large and cannot be reused. In addition, the production process of the skid assembly is complex and the cycle is long, which is inconsistent with the high reuse rate and short preparation time of the recoverable rocket sled. Therefore, in the test of the recoverable rocket sled, it is necessary to design a skid structure that can be recycled and easily replaced to meet the test requirements. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a recoverable rocket sled sliding shoe seat type sliding shoe structure, including a connecting plate, a sliding shoe seat, a shoe body, a slider, a baffle, a pin, a key and a bolt; the connecting plate is rectangular, with through holes on both sides, one side of the connecting plate is welded to the chassis of the sled body, and the other side is milled with a keyway in the center, and connected to the sliding shoe seat through a key and a bolt; the sliding shoe seat is a "π"-shaped structure, the upper part has a keyway and a threaded hole for connection, the lower part limits the lateral displacement of the shoe body, and then is connected to the shoe body through a pin, limiting the vertical and directional displacement of the boot body, and allowing the boot body to have a certain rotation range, so that the sled body can pass through the arc track; the inside of the boot body is designed with a groove and a threaded hole for installing a slider, and a baffle is installed at the tail of the boot body to limit the movement of the sliding shoe; the boot body cooperates with the track to limit the movement of the sled body along the track. The present invention can be recycled and easily replaced, can effectively withstand the impact and overload of the sled body and the track when the sled body moves, and is suitable for tracks such as straight tracks and arc tracks.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A recoverable rocket sled slide shoe seat type slide shoe structure, comprising a connecting plate, a slide shoe seat, a slide shoe body, a slider, a baffle, a pin shaft, a key and a bolt;

[0007] The connecting plate is rectangular, with through holes on both sides. One side of the connecting plate is welded to the skid chassis, and the other side is milled with a keyway in the center, and connected to the sliding shoe seat through a key and bolts; the key bears shear force to ensure the safety of the bolt connection;

[0008] The sliding shoe seat is a "π"-shaped structure, with a keyway and a threaded hole for connection on the upper part, and a lower part that limits the lateral displacement of the shoe body, and is then connected to the shoe body through a pin shaft to limit the vertical and directional displacement of the shoe body, and to allow the shoe body to have a certain rotation range, so that the skid body can pass through the arc track;

[0009] The inside of the boot body is designed with grooves and threaded holes for installing the slider, and a baffle is installed at the rear of the boot body to limit the movement of the slider;

[0010] The shoe body cooperates with the track to limit the movement of the skid body along the track direction.

[0011] Preferably, the connecting plate, the sliding shoe seat, the baffle, the shoe body and the key are 45 steel forgings that have been heat treated.

[0012] Preferably, the shoe seat, shoe body, pin shaft, key and bolt in the shoe seat type shoe part can be recycled. The connecting plate is simple in design and easy to process and shape, thus reducing the cost of non-recyclable utilization.

[0013] Preferably, a key limiter is designed between the connecting plate and the sliding shoe seat, and the shoe body is designed with a groove and a baffle to limit the sliding block.

[0014] Preferably, the lower part of the sliding shoe seat cooperates with the boot body to withstand the transmission of force caused by sway and torsion between the two, and the sliding shoe seat can adapt to boot bodies of different lengths.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention connects the sliding shoe seat to the skid chassis through a mounting plate, thereby avoiding deformation of the sliding shoe seat caused by direct welding.

[0017] 2. The size of the connecting plate of the present invention can be adjusted according to the size of the installation slide shoe seat. The slide shoe seat is designed with pin holes to achieve the installation of slide shoes with a length between 100mm and 200mm, meeting the test requirements of rocket sleds with different loads.

[0018] 3. Except for the connecting plate, all other parts of the present invention are detachable, which is convenient for replacement, thereby increasing the test efficiency and recycling rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural diagram of the slide shoe seat type slide shoe of the recovery type rocket sled of the present invention;

[0020] Figure 2 This is a longitudinal cross-sectional structural diagram of the slide shoe seat structure of the recovery type rocket sled of the present invention;

[0021] Figure 3 It is a structural diagram of the connecting plate of the present invention;

[0022] Figure 4 It is a structural diagram of the sliding shoe seat of the present invention;

[0023] Figure 5 It is a pin structure diagram of the present invention;

[0024] Figure 6 It is a structural diagram of the baffle of the present invention;

[0025] Figure 7 It is a structural diagram of the boot body of the present invention;

[0026] Figure 8 It is a key structure diagram of the present invention;

[0027] Fig. 9 It is a bolt structure diagram of the present invention;

[0028] Fig.10 It is a structural diagram of the slider of the present invention;

[0029] Fig.11 It is a schematic diagram of the actual application of the sliding shoe seat type sliding shoe of the present invention.

[0030] Among them: 1-connecting plate; 2-sliding shoe seat; 3-pin shaft; 4-baffle; 5-shoe body; 6-key; 7-bolt; 8-sliding block. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] The purpose of the present invention is to provide a standardized, recyclable and easily replaceable sliding shoe structure to address the shortcomings of the current recoverable rocket sled sliding shoes. The structure can effectively withstand the impact and overload of the sled body and the track during movement, and is suitable for straight tracks, curved tracks and other tracks. It is an efficient and convenient sliding shoe seat sliding shoe structure.

[0033] The present invention is described in detail below:

[0034] like Figures 1 to 11As shown, the present invention is a sliding shoe structure of a sliding shoe seat, including a connecting plate, a sliding shoe seat, a shoe body, a slider, a baffle, a pin, a key, and a bolt (including a flat washer and a spring washer). The connecting plate is rectangular, with through holes on both sides. One side is welded to the chassis of the sled body, and a keyway is milled in the center of the other side. It is connected to the sliding shoe seat through a key and a bolt. The key bears the shear force to ensure the safety of the bolt connection; the sliding shoe seat is a "π"-shaped structure, with a keyway and a threaded hole for connection in the upper part, and the lower part limits the lateral displacement of the shoe body, and then is connected to the shoe body through a pin to limit the vertical and directional displacement of the shoe body, and to allow the shoe body to have a certain rotation range, so that the sled body can pass through the arc track. The inside of the shoe body is designed with a groove and a threaded hole for installing a slider, and a baffle is installed at the tail of the shoe body to limit the movement of the sliding shoe. The shoe body cooperates with the track to limit the movement of the sled body along the track. After completing a test, if the sliding shoe seat type sliding shoe is worn and deformed and does not meet the next use, only the slider needs to be replaced, and the remaining structure of the sliding shoe can continue to be used. When all the rocket sled recovery tests are completed, the sliding shoe seat, shoe body, pin shaft, baffle, key and bolts in the sliding shoe seat structure can be recovered, and whether they can be reused can be determined based on the actual deformation.

[0035] The present invention is realized in that the connecting plate, the sliding shoe seat, the baffle plate, the shoe body and the key are 45 steel forgings that have been heat-treated, and the overall strength and rigidity are higher.

[0036] The present invention is also realized in that the sliding shoe seat, the shoe body, the pin shaft, the key and the bolt in the sliding shoe seat type sliding shoe part can be recycled. The connecting plate is simple in design and easy to process and shape, thereby reducing the non-recyclable cost.

[0037] The implementation of the present invention also lies in: the cross-sectional area of ​​the connecting part between the connecting plate and the chassis is larger and the weld is longer, a key limit is designed between the connecting plate and the sliding shoe seat, the shoe body is designed with a groove and a baffle to limit the slider, and the overall tensile and shear resistance of the sliding shoe structure is greatly improved.

[0038] The present invention is also achieved by: the sliding shoe seat is a "π"-shaped structure, the lower part cooperates with the boot body, can withstand the transmission of force caused by sway and torsion between the two, effectively reducing the load on the connecting shaft between the two, and the sliding shoe seat can adapt to boot bodies of different lengths.

[0039] Example:

[0040] Example 1

[0041] In a test of a recovery rocket sled, 7 engines were installed on the sled, with a maximum speed of about 0.8 Ma, a double-track single sled structure, a sled length of about 7 m, a sled mass of about 1 t, an engine mass of about 0.5 t, and a test mass of about 300 kg. A total of 4 tests were conducted. Since the overall mass and length of the recovery rocket sled test are relatively large, 2×4 slide shoe seat type slide shoes of the present invention are installed on the rocket sled chassis, that is, a total of 8 slide shoe seat type slide shoes are used for the test. In this example, the span of two adjacent slide shoe seat type slide shoes on each track is about 1.75 m. In the first two tests, since the wear of the slider is small, only the slider needs to be adjusted; the last two tests adjust the boot body and the slider. Except for the first test, the preparation time for the subsequent three tests is significantly shortened, and after all the tests are completed, most of the parts of the slide shoe seat type slide shoe can be recycled and reused here, achieving the expected purpose.

[0042] Example 2

[0043] In a rocket sled test, the sled body is equipped with one engine, the maximum speed is about 0.5 Ma, the double-track single sled structure is in the form of a double-track single sled, the total weight of the sled is about 200 kg, and the length of the sled body is about 2 m. Since the sled body needs to pass through the curved track, four sliding shoes of the sliding shoe seat type of the present invention are installed for testing. After dynamic simulation, the sled body can safely pass through the curved track, so the test is carried out and succeeds.

Claims

1. A recovery type rocket sled slide shoe seat type slide shoe structure, characterized in that: It includes a connecting plate, a sliding shoe seat, a shoe body, a sliding block, a baffle, a pin shaft, a key and a bolt; The connecting plate is rectangular, with through holes on both sides. One side of the connecting plate is welded to the skid chassis, and the other side is milled with a keyway in the center, and connected to the sliding shoe seat through a key and bolts; the key bears shear force to ensure the safety of the bolt connection; The sliding shoe seat is a "π"-shaped structure, with a keyway and a threaded hole for connection on the upper part, and a lower part that limits the lateral displacement of the shoe body, and is then connected to the shoe body through a pin shaft to limit the vertical and directional displacement of the shoe body, and to allow the shoe body to have a certain rotation range, so that the skid body can pass through the arc track; The inside of the boot body is designed with grooves and threaded holes for installing the slider, and a baffle is installed at the rear of the boot body to limit the movement of the slider; The shoe body cooperates with the track to limit the movement of the skid body along the track direction.

2. A recoverable rocket sled slide shoe seat type slide shoe structure according to claim 1, characterized in that: The connecting plate, the sliding shoe seat, the baffle, the shoe body and the key are 45 steel forgings that have been heat treated.

3. The recoverable rocket sled slide shoe seat structure according to claim 1, characterized in that: The sliding shoe seat, the shoe body, the pin shaft, the key and the bolt in the sliding shoe seat type sliding shoe part can be recycled; the connecting plate is simply designed to facilitate processing and molding, thereby reducing the non-recyclable cost.

4. The recoverable rocket sled slide shoe seat type slide shoe structure according to claim 1, characterized in that: A key limiter is designed between the connecting plate and the sliding shoe seat, and a groove and a baffle are designed on the shoe body to limit the sliding block.

5. The slide shoe structure of the recovery rocket sled according to claim 1, characterized in that: The lower part of the sliding shoe seat cooperates with the boot body and can withstand the transmission of force caused by sway and torsion between the two, and the sliding shoe seat can be adapted to boot bodies of different lengths.

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