A sliding door device for aircraft engine test equipment

Abstract

The present invention belongs to the field of aero-engine test equipment design, and discloses a sliding door device for aero-engine test equipment, the sliding door device comprising a cabin and a cabin door, the upper door frame and the lower door frame of the cabin door frame on the cabin are both provided with horizontal tracks, the horizontal tracks include fixed tracks and movable tracks, and a lifting mechanism for driving the movable tracks to rise or fall is provided below the movable tracks; the cabin door is slidingly arranged on the cabin, and the lower surfaces of the upper frame and the lower frame of the cabin door are both provided with a driving wheel group sliding on the horizontal track; when the cabin door slides on the horizontal track to close the cabin, the driving wheel group is located above the movable track, and after the lifting mechanism drives the movable track to descend, the driving wheel group is separated from the movable track. The sliding door device of the present invention can achieve uniform force on the cabin door and the cabin under negative pressure conditions through the movable track, the lifting mechanism, and the setting of the inclined blocks that cooperate with each other between the axial door hook and the cabin door and the cabin door frame.

Description

Technical Field

[0001] The invention belongs to the field of aeroengine test equipment design and relates to a sliding door device for aeroengine test equipment. Background Art

[0002] The aircraft engine test chamber is used to install the test engine, and with the help of exhaust cooling devices, exhaust air sources and cabin pressure regulation systems, the environmental pressure conditions for engine exhaust tests are formed. Among them, the test chamber door is an important part of the aircraft engine test equipment, ensuring that the test engine and the equipment that needs to be replaced in the chamber can freely enter and exit the test chamber. Therefore, the door must meet the requirements of easy opening and operation, safety and reliability, good sealing, and easy maintenance and repair.

[0003] The doors of large aircraft engine test equipment are large in size and heavy in weight. The doors of existing engine test equipment are opened by flip-up and lifting side-sliding. The flip-up door has a large flip angle and occupies a large space. In addition, its flipping mechanism has the disadvantages of a long lever arm, a complex structure and high difficulty in implementation, making it unsuitable for the opening of large test cabin doors. The lifting side-sliding door requires a lifting device to lift the door to a certain height and then open it horizontally. Its movement is a combination of vertical lifting and horizontal flipping. The reliability and reset accuracy of its lifting device are relatively poor, which may lead to the adverse consequence of poor sealing.

[0004] In view of this, the present invention designs a cabin door suitable for aircraft engine testing. Summary of the invention

[0005] In order to solve the technical problems that the existing flip-up type and lifting and sliding type cabin doors in large aircraft engine test equipment have complex structures, difficult implementation, low reliability and poor precision, the present invention discloses a sliding cabin door device for aircraft engine test equipment, the sliding cabin door device comprises a cabin body and a cabin door.

[0006] Wherein, both the upper door frame and the lower door frame of the cabin door frame are provided with horizontal tracks, the horizontal tracks include fixed tracks and movable tracks, and a lifting mechanism for driving the movable tracks to rise or fall is provided below the movable tracks;

[0007] The cabin door is slidably arranged on the cabin body, and the lower surfaces of the upper frame and the lower frame of the cabin door are both provided with a driving wheel group sliding on the horizontal track;

[0008] When the cabin door slides on the horizontal track to close the cabin body, the driving wheel group is located above the movable track. After the lifting mechanism drives the movable track to descend, the driving wheel group is separated from the movable track.

[0009] In an optional embodiment of the above-mentioned driving wheel group, the driving wheel group includes a first driving wheel group arranged on the upper frame and a second driving wheel group arranged on the lower frame, the first driving wheel group is opposite to the second driving wheel group, and the first driving wheel group and the second driving wheel group both include a driving wheel group and a driven wheel group.

[0010] In another optional embodiment of the above-mentioned driving wheel group, the driving wheel group also includes two guide wheel groups, and the two guide wheel groups are respectively located on the outside of the driving wheel group and the driven wheel group, and each guide wheel group includes guide wheels located on both sides of the horizontal track.

[0011] In an optional embodiment of the above-mentioned hatch, the upper surface of the upper frame and the upper surface of the lower frame of the hatch are both provided with auxiliary load-bearing blocks, and when the hatch closes the cabin body, the auxiliary load-bearing blocks are located above the fixed track; before the lifting mechanism drives the movable track to descend, there is a gap between the auxiliary load-bearing blocks and the fixed track, and after the lifting mechanism drives the movable track to descend, the auxiliary load-bearing blocks are in contact with the fixed track.

[0012] In an optional embodiment of the above-mentioned sliding door device, a first axial door hook mechanism and a second axial door hook mechanism are provided on the cabin body, the first axial door hook mechanism is located on the outer side of the upper door frame, and the second axial door hook mechanism is located on the outer side of the lower door frame, and the first axial door hook mechanism and the second axial door hook mechanism both include a plurality of axial door hooks arranged at equal intervals on the corresponding door frames.

[0013] In an optional embodiment of the above-mentioned axial door hook, a first inclined block is provided on the axial door hook, and a second inclined block matching each of the first inclined blocks is respectively provided on the upper frame and the lower frame of the cabin door.

[0014] In an optional embodiment of the cabin door frame, a plurality of third inclined blocks are evenly spaced on the lower door frame of the cabin door frame, and a fourth inclined block cooperating with each third inclined block is provided on the inner side of the lower frame of the cabin door.

[0015] Preferably, the inclination angles of the first inclined block, the second inclined block, the third inclined block and the fourth inclined block are 10° to 30°.

[0016] In an optional embodiment of the above-mentioned lifting mechanism, the lifting mechanism includes a lifting drive motor, a first coupling and a lift assembly connected in sequence, a balancing ball joint is provided at the top of the lift assembly, and the top of the balancing ball joint is connected to the guide base on the lower surface of the movable track.

[0017] In an optional embodiment of the above-mentioned sliding door device, a plurality of circumferential door hooks are provided on the left door frame and the right door frame of the cabin body door frame, and a sealing structure is provided between the cabin body door frame and the cabin door.

[0018] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification include at least the following: the sliding door device of the present invention is suitable for opening and closing large-sized curved doors, and has the characteristics of simple structure, relatively low cost and small space occupation. In addition, by designing the track in the sliding door device, designing it as a fixed track and a movable track, and arranging a lifting mechanism on the movable track, the driving wheel group can be located exactly on the movable track when the door is closed, and the movable track is controlled to descend by the lifting mechanism to separate it from the driving wheel group, so as to avoid the driving wheel group being damaged by the vertical pressure of the door. Furthermore, by designing a mutually cooperating inclined block between the axial door hook and the door and cabin door frame, the horizontal force of the cabin can be balanced when a negative pressure test is performed, thereby achieving uniform force on the door and cabin under negative pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A front view of a sliding door device for an aero-engine test equipment disclosed in an embodiment of the present invention;

[0021] Figure 2 A side view of a sliding door device for an aero-engine test equipment disclosed in an embodiment of the present invention;

[0022] Figure 3 A rear view of a sliding door device for an aero-engine test device disclosed in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a horizontal track and a lifting mechanism disclosed in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a driving wheel assembly disclosed in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a guide wheel assembly disclosed in an embodiment of the present invention;

[0026] Figure 7It is a schematic diagram of the auxiliary bearing block contacting with the fixed track after the movable track disclosed in the embodiment of the present invention descends;

[0027] Figure 8 A schematic diagram of a first inclined block and a second inclined block at the axial door hooks at the top and bottom of a hatch door disclosed in an embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a third inclined block and a fourth inclined block at an axial door hook at the bottom of a hatch door disclosed in an embodiment of the present invention;

[0029] Among them, 1. cabin; 2. horizontal track; 3. cabin door; 4. driving wheel group; 5. driven wheel group; 6. guide wheel group; 7. auxiliary load-bearing block; 8. axial door hook; 9. first inclined block; 10. second inclined block; 11. third inclined block; 12. fourth inclined block; 13. circumferential door hook; 14. sealing structure; 21. fixed track; 22. movable track; 23. lifting mechanism; 231. lifting drive motor; 232. first coupling; 233. elevator assembly; 2331. first spiral elevator; 2332. second coupling; 2333. second spiral elevator; 234. balancing ball joint; 235. guide base; 41. wheel support frame; 42. balancing hinge; 43. wheel fixing frame; 44. first wheel; 45. second wheel; 601. guide wheel. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0031] The following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and the features of the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0032] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the 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 invention.

[0033] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The drawings only show components related to the present disclosure rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] The embodiment of the present invention discloses a sliding door device for an aero-engine test equipment. Figure 1 and Figure 4 As shown, the sliding door device includes a cabin body 1 and a cabin door 3. The upper door frame and the lower door frame of the cabin door frame on the cabin body 1 are both provided with horizontal tracks 2. The horizontal tracks 2 include a fixed track 21 and a movable track 22. A lifting mechanism 23 for driving the movable track 22 to rise or fall is provided below the movable track 22. The cabin door 3 is slidably arranged on the cabin body 1. The lower surfaces of the upper frame and the lower frame of the cabin door 3 are both provided with a driving wheel group sliding on the horizontal track 2.

[0036] When the cabin door 3 slides on the horizontal track 2 to close the cabin body, the driving wheel group is located above the movable track 22 , and after the lifting mechanism 23 drives the movable track 22 to descend, the driving wheel group is separated from the movable track 22 .

[0037] When the aircraft engine test is not being conducted, the pressure in the cabin is normal pressure, and the cabin door 3 can slide sideways along the horizontal track 2 to move and open and close. At this time, the cabin door 3 can use the driving wheel group as a fulcrum, and the wheel pressure borne by the driving wheel group is only the dead weight of the cabin door 3. When the aircraft engine test is being conducted, the cabin will be in a negative pressure state. Under the extreme negative pressure state, the driving wheel group will be subjected to a huge wheel pressure, which may damage the driving shaft and bearing of the driving wheel group. Therefore, the present invention designs the horizontal track 2, and designs it to be composed of a movable track 22 and a fixed track 21, so that when the cabin door 3 slides on the horizontal track 2 to close the cabin body, the driving wheel group is just located on the movable track 22, and the movable track 22 is lowered by the lifting mechanism 23, so that the movable track 22 can be separated from the driving wheel group, so that the door body of the cabin door 3 is in contact with the fixed track, so that the driving wheel group is suspended and does not bear any force.

[0038] In an optional embodiment of the above-mentioned hatch 3, see Figure 2 As shown, the cabin is a cylindrical structure with a cavity, and the entrance and exit of the aircraft engine to be tested are opened on the curved surface of the side thereof, and a cabin door frame is arranged on the entrance and exit, and a round arched cabin door 3 is slidably arranged on the cabin door frame, and the cabin door 3 can adopt a "frame-panel" structure, and the cabin door frame changes from curved to straight after passing the right quadrant point, and is parallel to the cabin door frame panel, which is convenient for supporting and sealing the cabin door 3. The cabin door frame can be welded into a whole by box-shaped ribs to ensure the strength and rigidity of the entire cabin door 3. Optionally, in order to ensure that the aircraft engine to be tested can be sent into and out of the cavity of the cabin, the curvature of the cabin door 3 can be set to 160°~180°, and at the same time, the lower frame of the cabin door frame of the cabin door 3 can be made parallel to the ground.

[0039] In an optional embodiment of the above-mentioned driving wheel group, the driving wheel group includes a first driving wheel group arranged on the upper frame of the door frame of the door 3 and a second driving wheel group arranged on the lower frame of the door frame of the door 3, and the first driving wheel group is opposite to the second driving wheel group, see Figure 1 and Figure 3 As shown, the first driving wheel set and the second driving wheel set have the same structure, both including a driving wheel set 4 and a driven wheel set 5, wherein the driving wheel set 4 provides a side sliding driving force for the cabin door 3, wherein the driving wheel set 4 is equipped with a reducer.

[0040] In an optional embodiment of the driving wheel set 4 and the driven wheel set 5, see Figure 5As shown, the driving wheel set 4 includes a wheel support frame 41, a balancing hinge 42, a wheel set, a wheel axle and a wheel driving motor, the wheel driving motor is fixed on the lower frame of the hatch 3, and its output end is connected to the wheel axle of the wheel set, the wheel support frame 41 is transitionally connected to the lower frame of the hatch 3 through a hinge, wherein the wheel set includes a wheel fixing frame 43, a first wheel 44, and a second wheel 45. The components in the driving wheel set 4 are connected in a hinged manner, which can ensure that the first wheel 44 and the second wheel 45 in the wheel set have the same wheel pressure.

[0041] In another optional embodiment of the above-mentioned driving wheel assembly, when the aircraft engine is placed in the cabin to conduct a test of pumping negative pressure, the position of the cabin door 3 may be offset under the influence of the negative pressure suction. In order to correct the position of the cabin door to avoid its positional offset, see Figure 1 and Figure 6 As shown, the driving wheel group also includes two guide wheel groups 6, and the two guide wheel groups 6 are respectively located on the outside of the driving wheel group 4 and the driven wheel group 5, and each guide wheel group 6 includes guide wheels 601 located on both sides of the horizontal track 2. After the position of the hatch 3 is adjusted, the installation gap between the two guide wheels 601 in the guide wheel group 6 and the horizontal track 2 is 1 mm on the left and right to prevent the hatch 3 from running off during the opening and closing process. The guide wheel group 6 itself consists of a pin shaft, two self-lubricating bearings and two guide wheels 601, and is installed on the frame of the hatch 3 by screws. Two sets of guide wheel groups 6 are arranged on the upper and lower sides of the hatch 3, respectively located at the two ends of the hatch 3, to ensure that the hatch 3 moves in a straight line.

[0042] In an optional embodiment of the above-mentioned hatch 3, in order to change the force bearing system of the hatch 3 from the driving wheel group to the hatch 3 pressure bearing, the lower surface of the upper frame and the lower surface of the lower frame of the hatch 3 are both provided with auxiliary bearing blocks 7. When the hatch 3 closes the cabin body, the auxiliary bearing blocks 7 are located above the fixed track 21; before the lifting mechanism 23 drives the movable track 22 to descend, there is a gap between the auxiliary bearing blocks 7 and the fixed track 21, see Figure 7 As shown, after the lifting mechanism 23 drives the movable track 22 to descend, the auxiliary bearing block 7 contacts the fixed track 21. In specific implementation, several auxiliary bearing blocks 7 can be arranged along the axial direction of the hatch 3, and the gap between the auxiliary bearing block 7 and the fixed track 21 is adjusted to 30mm in the initial state (i.e. before the movable track 22 is descended). Before the negative pressure is pumped, the movable track 22 is lowered by 30mm, and after the auxiliary bearing block 7 contacts the fixed track 21, the hatch 3 as a whole will also be lowered by 30mm, and the driving wheel group is suspended without bearing force.

[0043] In addition, the auxiliary load-bearing block 7 can be located outside the range of the fixed track 21, and can be located below the lower frame of the cabin door frame and set at a certain distance. After the movable track 22 descends, the auxiliary load-bearing block 7 is in contact with the lower frame of the cabin door frame to achieve the suspension of the driving wheel group.

[0044] In an optional embodiment of the above sliding door device, the cabin body is provided with a first axial door hook mechanism and a second axial door hook mechanism, the first axial door hook mechanism is located on the outer side of the upper door frame, and the second axial door hook mechanism is located on the outer side of the lower door frame, see Figure 1 , Figure 2 , Figure 8 and Fig. 9 As shown, the first axial door hook mechanism and the second axial door hook mechanism both include a plurality of evenly arranged axial door hooks 8 .

[0045] In an optional embodiment of the above-mentioned axial door hook 8, when negative pressure is drawn to conduct aircraft engine tests, the internal pressure suction force borne by the cabin door 3 can be decomposed into vertical bearing and horizontal bearing. By suspending the driving wheel group to make the cabin door 3 contact the fixed track 21 or the cabin body, or by using the auxiliary load-bearing block 7, the vertical component caused by the negative pressure can be balanced. In order to balance the horizontal component caused by the negative pressure, multiple sets of mutually cooperating inclined blocks can be set at the position where the axial door hook 8 interacts with the cabin door 3 or the cabin door frame. Specifically, see Figure 8 and Fig. 9 As shown, the axial door hook 8 is provided with a first inclined block 9 , and the upper frame and the lower frame of the cabin door 3 are respectively provided with a second inclined block 10 matched with each of the first inclined blocks 9 .

[0046] In an optional embodiment of the cabin door frame, see Fig. 9 As shown, a plurality of third inclined blocks 11 are evenly arranged on the lower door frame of the cabin door frame, and a fourth inclined block 12 cooperating with each of the third inclined blocks 11 is arranged on the inner side of the lower frame of the cabin door 3. Before the negative pressure is pumped, after the cabin door 3 is lowered by the lifting mechanism 23, the second inclined block 10 on the cabin door 3 will abut against the first inclined block 9 of the axial door hook 8, and the fourth inclined block 12 of the cabin door 3 will abut against the third inclined block 11 of the cabin door frame. After the test is completed, after the cabin door 3 is raised by the lifting mechanism, the mutually abutting inclined blocks will separate. For example, when the cabin door 3 rises 30 mm, there is a separation gap of about 10 mm between the mutually abutting inclined blocks.

[0047] Preferably, the inclination angles of the first inclined block 9, the second inclined block 10, the third inclined block 11 and the fourth inclined block 12 are 10° to 30°. Preferably, the inclination angle of each inclined block may be set to 20°.

[0048] In an optional embodiment of the lifting mechanism 23, see Figure 4 As shown, the lifting mechanism 23 includes a lifting drive motor 231, a first coupling 232 and a lift assembly 233 connected in sequence. A balancing ball joint 234 is provided at the top of the lift assembly 233. The top of the balancing ball joint 234 is connected to a guide base 235 on the lower surface of the movable track 22. In the specific implementation, in order to improve the stability of the movable track 22 when it is rising or falling, see Figure 4 As shown, the elevator assembly 233 includes a first spiral elevator 2331, one end of the first spiral elevator 2331 is connected to the output end of the first coupling 232, the other end of the second spiral elevator 2333 is connected to the second spiral elevator 2333 via the second coupling 2332, the first spiral elevator 2331 and the second spiral elevator 2333 are on the same horizontal line, two guide bases 235 are arranged on the lower surface of the movable track 22, and the tops of the first spiral elevator 2331 and the second spiral elevator 2333 are respectively connected to the guide base 235 above them via a balancing ball joint 234.

[0049] When controlling the movable track 22 to descend, the first screw elevator 2331 and the second screw elevator 2333 can move simultaneously, and the hatch 3 also descends when the movable track 22 descends, until the rest of the lower frame of the hatch 3 except the driving wheel set is evenly in contact with the fixed track 21 or the cabin body. At this time, the movement of the lifting mechanism 23 can drive the hatch 3 to descend as a whole, such as descending by 30mm (the height of the descent is determined by the distance between the rest of the lower frame of the hatch 3 except the driving wheel set and the fixed track 21), so that the steel structure on the hatch 3 is pressed on the cabin body or the fixed track 21, so that the driving wheel set is suspended, thereby protecting the driving wheel set. In addition, the rise or fall of the movable track 22 can be controlled by a limit switch. When the hatch 3 needs to be opened, the movable track 22 is controlled to rise to be flush with the fixed track 21, and the height difference between the two is not greater than 1mm. At this time, the hatch 3 can slide freely out of the test cabin.

[0050] In an optional embodiment of the above sliding door device, see Figure 1 , Figure 8 and Fig. 9 As shown, a plurality of circumferential door hooks 13 are provided on the left door frame and the right door frame of the cabin door frame, and a sealing structure 14 is provided between the cabin door frame and the cabin door 3. The sealing structure 14 can seal the cabin door 3 and the cabin door frame to prevent air leakage from affecting the conduct of the aircraft engine test.

[0051] The sliding door device of the present invention is suitable for opening and closing large-sized curved doors, and has the characteristics of simple structure, relatively low cost and small space occupation. In addition, by designing the track in the sliding door device, designing it into a fixed track and a movable track, and arranging a lifting mechanism on the movable track, the driving wheel group can be exactly located on the movable track when the door is closed, and the movable track is controlled to descend by the lifting mechanism to separate it from the driving wheel group, so as to avoid the driving wheel group being damaged by the vertical pressure of the door. Furthermore, by designing a mutually cooperating inclined block between the axial door hook and the door and cabin door frame, the horizontal force of the cabin can be balanced when a negative pressure test is performed, thereby achieving uniform force on the door and cabin under negative pressure conditions.

[0052] Obviously, those skilled in the art should understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sliding door device for an aircraft engine test equipment, characterized in that: include: A cabin (1), wherein the upper door frame and the lower door frame of the cabin door frame on the cabin (1) are both provided with horizontal tracks (2), the horizontal tracks (2) comprising a fixed track (21) and a movable track (22), a lifting mechanism (23) for driving the movable track (22) to rise or fall is provided below the movable track (22), a first inclined block (9) is provided on the axial door hook (8) of the first axial door hook mechanism and the second axial door hook mechanism of the cabin, and a plurality of third inclined blocks (11) are provided at equal intervals on the lower door frame of the cabin door frame; A hatch (3), the hatch (3) being slidably arranged on the cabin body (1), the lower surfaces of the upper frame and the lower frame of the hatch (3) being provided with a driving wheel group sliding on the horizontal track (2), the lower surfaces of the upper frame and the lower surface of the lower frame of the hatch (3) being provided with an auxiliary load-bearing block (7), the upper frame and the lower frame being provided with a second inclined block (10) cooperating with each of the first inclined blocks (9), respectively, and the inner side of the lower frame being provided with a fourth inclined block (12) cooperating with each of the third inclined blocks (11); before negative pressure is pumped, the second inclined block (10) abuts against the first inclined block (9), and the fourth inclined block (12) abuts against the third inclined block (11); when the position of the hatch (3) is offset during negative pressure pumping, the first inclined block (9), the second inclined block (10), the third inclined block (11) and the fourth inclined block (12) cooperate to balance the horizontal component force caused by the negative pressure; When the cabin door (3) slides on the horizontal track (2) to close the cabin body, the driving wheel group and the auxiliary load-bearing block (7) are located above the movable track (22); before the lifting mechanism (23) drives the movable track (22) to descend, there is a gap between the auxiliary load-bearing block (7) and the fixed track (21); after the lifting mechanism (23) drives the movable track (22) to descend, the driving wheel group separates from the movable track (22), and the auxiliary load-bearing block (7) contacts the fixed track (21); The lifting mechanism (23) comprises a lifting drive motor (231), a first coupling (232) and a lifting assembly (233) which are connected in sequence. A balancing ball joint (234) is provided at the top of the lifting assembly (233). The top of the balancing ball joint (234) is connected to a guide base (235) on the lower surface of the movable track (22). After the test is completed, the lifting mechanism (23) causes the cabin door (3) to rise, and then the second inclined block (10) is separated from the first inclined block (9), and the fourth inclined block (12) is separated from the third inclined block (11).

2. The sliding door device for aircraft engine test equipment according to claim 1, characterized in that: The driving wheel set comprises a first driving wheel set arranged on the upper frame and a second driving wheel set arranged on the lower frame, the first driving wheel set and the second driving wheel set being located opposite to each other, and both the first driving wheel set and the second driving wheel set comprise a driving wheel set (4) and a driven wheel set (5).

3. The sliding door device for aircraft engine test equipment according to claim 2, characterized in that: The driving wheel set further comprises two guide wheel sets (6), the two guide wheel sets (6) being respectively located outside the driving wheel set (4) and the driven wheel set (5), and each guide wheel set (6) comprises guide wheels (601) located on both sides of the horizontal track (2).

4. The sliding door device for aircraft engine test equipment according to claim 1, characterized in that: The cabin body is provided with a first axial door hook mechanism and a second axial door hook mechanism, the first axial door hook mechanism is located on the outer side of the upper door frame, and the second axial door hook mechanism is located on the outer side of the lower door frame, and the first axial door hook mechanism and the second axial door hook mechanism both include a plurality of axial door hooks (8) arranged at equal intervals on the corresponding door frames.

5. The sliding door device for aircraft engine test equipment according to claim 1, characterized in that: The inclination angles of the first inclined block (9), the second inclined block (10), the third inclined block (11) and the fourth inclined block (12) are between 10° and 30°.

6. The sliding door device for aircraft engine test equipment according to claim 1, characterized in that: A plurality of circumferential door hooks (13) are provided on both the left door frame and the right door frame of the cabin body door frame, and a sealing structure (14) is provided between the cabin body door frame and the cabin door (3).

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