Device for quickly starting turbojet engine

Abstract

The utility model discloses a device for quickly starting a turbojet engine, which comprises a starting motor supported by a starting motor support, and a clutch mechanism is mounted below the starting motor support. The clutch mechanism comprises a clutch mechanism inner column connected with a motor shaft of the starting motor and a clutch mechanism shell arranged outside the clutch mechanism inner column in a sleeving mode. A limiting stick perpendicular to the clutch mechanism inner column is arranged on the clutch mechanism inner column, and a track spirally extending from top to bottom is arranged on the clutch mechanism shell. The limiting stick extends out of the track, and the limiting stick rotates to drive the clutch mechanism shell to move downwards and rotate; and an O-shaped ring which is in contact connection with the starting shaft head is arranged at the bottom of the clutch mechanism shell. According to the device for quickly starting the turbojet engine, the motor is connected with the clutch mechanism and is in hard contact with the starting shaft head, and the motor rotates to drive the gas compressor to work, so that the turbojet engine works, the safety risk is reduced, and the device can be repeatedly used.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine starting devices, in particular to a device for quickly starting a turbojet engine. Background Art

[0002] Aircraft turbojet engines are generally required to accelerate from zero to maximum speed within 3 to 10 seconds. To meet the rapid response requirements of missile or aircraft turbojet engines, turbojet engines must have a fast start capability.

[0003] Currently, the main rapid starting method used for turbojet engines is pyrotechnic ignition + gunpowder impact, that is, a pyrotechnic igniter is used to ignite the fuel in the turbojet engine combustion chamber, and a gunpowder starter is used to impact the turbine in the turbine installation area of ​​the turbojet engine, so that the turbine quickly drives the centrifugal impeller to rotate (i.e., the turbine quickly drives the impeller).

[0004] This quick start method can only be used once. If you want to achieve multiple ignitions, you need to equip multiple sets. In addition, fireworks and gunpowder are both pyrotechnic products, and there are safety risks in storage and transportation. Utility Model Content

[0005] Based on the above deficiencies in the existing technology, the technical problem solved by the present invention is to provide a device for quickly starting a turbojet engine. The device adopts a hard contact method between a motor-connected clutch mechanism and a starting shaft head. The rotation of the motor drives the compressor to work, thereby making the turbojet engine work, reducing safety risks and being reusable.

[0006] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: the present invention provides a device for quick starting of a turbojet engine, comprising a starter motor supported by a starter motor bracket, a clutch mechanism being installed below the starter motor bracket, the clutch mechanism comprising a clutch mechanism inner column connected to the motor shaft of the starter motor, and a clutch mechanism outer shell sleeved outside the clutch mechanism inner column; the clutch mechanism inner column is provided with a limit stick arranged perpendicularly thereto, and the clutch mechanism outer shell is provided with a track extending spirally from top to bottom; the limit stick extends out of the track, and the clutch mechanism outer shell is driven to move downward and rotate through the rotation of the limit stick; the bottom of the clutch mechanism outer shell is provided with an O-ring that is in contact with the starter shaft head.

[0007] Furthermore, the top of the starting shaft head is in an inverted cone shape, and when the clutch mechanism housing moves downward, the O-ring is coupled to the conical surface of the top of the starting shaft head.

[0008] Furthermore, when the O-ring contacts the starting shaft head, the limiting rod is at a distance from the top of the track.

[0009] Preferably, the bottom of the clutch mechanism housing has an annular groove, and the O-ring is fixed in the annular groove.

[0010] Optionally, the top of the clutch mechanism inner column extending out of the clutch mechanism housing is provided with a positioning hole perpendicular to the central axis of the clutch mechanism inner column, and the end of the motor shaft of the starting motor extending into the inner cavity of the clutch mechanism inner column is provided with a threaded hole, and a flat-head screw passes through the positioning hole and is connected to the threaded hole to fix the motor shaft of the starting motor and the clutch mechanism inner column.

[0011] Furthermore, a thrust bearing is provided between the motor shaft of the starter motor and the inner cavity of the inner column of the clutch mechanism.

[0012] Preferably, the starter motor is fixed to the starter motor bracket by means of hexagon socket head screws.

[0013] From the above, the turbojet engine quick start device of the present invention has at least the following beneficial effects:

[0014] 1. The turbojet engine quick start device of the present invention can be reused and adopts electric start, which reduces safety risks.

[0015] 2. When starting a turbojet engine, the starting motor and clutch mechanism drive the compressor to work. When the speed reaches a certain high speed, the clutch mechanism and the compressor are disconnected. During the starting process, the clutch mechanism is used to rotate the engine, ultimately achieving the purpose of starting. The motor is connected to the clutch mechanism and the starting shaft head in hard contact. The motor rotates to drive the compressor, thus making the turbojet engine work.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the invention more obvious and easy to understand, the following is a detailed description in combination with the preferred embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.

[0018] Figure 1 This is a schematic structural diagram of a device for quickly starting a turbojet engine according to the present invention;

[0019] Figure 2 This is a schematic structural diagram of the clutch mechanism of the present utility model;

[0020] Figure 3 This is a schematic diagram of the limit rod of the present invention being located at the bottom end of the track (locking position);

[0021] Figure 4 This is a schematic diagram of the limit rod of the present invention being located at the topmost position of the track;

[0022] Figure 5 This is a schematic structural diagram of the clutch mechanism housing of the present utility model;

[0023] Figure 6 This is a schematic diagram of the connection between the O-ring and the starting shaft head of the utility model;

[0024] Figure 7 It is a schematic diagram of the clutch mechanism and the starter shaft head being disconnected in the utility model;

[0025] Figure 8 This is a schematic diagram of the connection between the clutch mechanism and the starting shaft head of the utility model.

[0026] In the figure: 10-starting motor, 20-starting motor bracket, 30-hexagon socket head screw, 40-thrust bearing, 50-flat head screw, 60-clutch mechanism, 61-clutch mechanism inner column, 62-track, 63-limiting rod, 64-clutch mechanism housing, 65-annular groove, 70-O-ring, 80-starting shaft head. DETAILED DESCRIPTION

[0027] The following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings, which constitute a part of this specification and illustrate the principles of the present invention through examples. Other aspects, features, and advantages of the present invention will become apparent from this detailed description. In the accompanying drawings, the same or similar components are represented by the same reference numerals in different figures.

[0028] like Figures 1 to 8 As shown, the turbojet engine rapid starting device of the present invention includes a starter motor 10 supported by a starter motor bracket 20. The starter motor 10 is fixed to the starter motor bracket 20 via a hexagon socket head cap screw 30. A clutch mechanism is mounted below the starter motor bracket 20. The clutch mechanism includes a clutch mechanism inner column 61 connected to the motor shaft of the starter motor 10 and a clutch mechanism housing 64 that is sleeved around the clutch mechanism inner column 61.

[0029] The clutch mechanism inner column 61 is provided with a vertically mounted stop rod 63. The clutch mechanism outer shell 64 is provided with a spiral track 62 extending from top to bottom, running through the inside and outside of the clutch mechanism outer shell 64. The stop rod 63 extends out of the track 62 and rotates with the clutch mechanism inner column 61. The rotation of the stop rod 63 drives the clutch mechanism outer shell 64 downward and rotates. An O-ring 70 is provided at the bottom of the clutch mechanism outer shell 64, which contacts and engages with the starter shaft head 80.

[0030] In addition, the top of the starting shaft head 80 is in an inverted cone shape, and when the clutch mechanism housing 64 moves downward, the O-ring 70 is coupled to the conical surface of the top of the starting shaft head 80.

[0031] like Figure 2 As shown, the top of the clutch mechanism inner column 61 extending out of the clutch mechanism housing 64 is provided with a positioning hole perpendicular to the central axis of the clutch mechanism inner column 61. The end of the motor shaft of the starter motor 10 extending into the inner cavity of the clutch mechanism inner column 61 is provided with a threaded hole. A flat-headed screw 50 passes through the positioning hole and connects with the threaded hole to secure the motor shaft of the starter motor 10 to the clutch mechanism inner column 61. A thrust bearing 40 is provided between the motor shaft of the starter motor 10 and the inner cavity of the clutch mechanism inner column 61 to bear axial loads.

[0032] The clutch mechanism inner column 61 inside the clutch mechanism 60 is fixed in the track 62 of the clutch mechanism housing 64 using a limiting rod 63. Under normal conditions, the limiting rod 63 is stuck in the locking position of the clutch mechanism 60 (such as Figure 3 (As shown), after the clutch mechanism inner column 61 is secured to the starter motor 10, the motor shaft of the starter motor 10 rotates, driving the clutch mechanism inner column 61. Due to centrifugal force, the stopper 63 slides within the track 62 of the clutch mechanism outer shell 64, causing the clutch mechanism outer shell 64 to move downward along the axial direction of the clutch mechanism inner column 61. During assembly, the position of the clutch mechanism 60 is adjusted so that when the O-ring 70 contacts the starter shaft head 80, the stopper 63 is still some distance (one-third of the travel) from the top of the track 62, ensuring that the O-ring 70 can still be used after wear.

[0033] like Figure 5 As shown, the bottom of the clutch mechanism housing 64 has an annular groove 65, into which the O-ring 70 is placed. Due to the elastic force, the O-ring 70 will be fixed in the annular groove 65. When the clutch mechanism 60 contacts the starting shaft head 80, the O-ring 70 will increase the friction force of the clutch mechanism 60.

[0034] Below, refer to Figures 1 to 8 Combined with the description of the above structural features, the working principle of the device for rapid starting of a turbojet engine of the present invention is described as follows:

[0035] Use M2.5*6 hexagon socket head screws 30 to secure the starter motor 10 to the starter motor bracket 20. Then, insert the thrust bearing 40 into the motor shaft of the starter motor 10. Insert the motor shaft into the clutch mechanism inner column 61 and secure them together using an M2*4 flat head screw 50. When the starter motor 10 is started, the motor shaft and the clutch mechanism inner column 61 rotate synchronously. Under the action of the limit rod 63 and centrifugal force, the clutch mechanism housing 64 is thrown downward. After the limit rod 63 reaches the top of the track, the O-ring 70 contacts and connects with the starter shaft head 80. The clutch mechanism inner column 61 and the limit rod 63 drive the clutch mechanism housing 64 to rotate. When the O-ring 70 contacts the starter shaft head 80, the O-ring 70 couples with the tapered surface of the starter shaft head 80, driving the starter shaft head 80 and the compressor to work. The compressor and the starting shaft head 80 are connected by reverse thread. When the starting shaft head 80 and the compressor rotate in the same direction, they will not rotate and disengage, thereby allowing the engine to run.

[0036] The above description is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of rights of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and changes without departing from the principles of the present invention, and these improvements and changes are also considered to be within the scope of protection of the present invention.

Claims

1. A device for quickly starting a turbojet engine, comprising a starter motor (10) supported by a starter motor bracket (20), characterized in that: A clutch mechanism is installed below the starter motor bracket (20), and the clutch mechanism includes a clutch mechanism inner column (61) connected to the motor shaft of the starter motor (10) and a clutch mechanism outer shell (64) sleeved outside the clutch mechanism inner column (61); The clutch mechanism inner column (61) is provided with a limiting rod (63) vertically arranged therewith, and the clutch mechanism outer shell (64) is provided with a track (62) extending spirally from top to bottom; the limiting rod (63) extends out of the track, and the clutch mechanism outer shell (64) is driven to move downward and rotate by the rotation of the limiting rod (63); The bottom of the clutch mechanism housing (64) is provided with an O-ring (70) in contact with the starting shaft head (80).

2. The device for quickly starting a turbojet engine according to claim 1, wherein: The top of the starting shaft head (80) is in an inverted cone shape, and when the clutch mechanism housing (64) moves downward, the O-ring (70) is coupled to the cone surface on the top of the starting shaft head (80).

3. The device for quickly starting a turbojet engine according to claim 1, wherein: When the O-ring (70) contacts the starting shaft head (80), the limiting rod (63) is at a distance from the top end of the track (62).

4. The device for quickly starting a turbojet engine according to claim 1, wherein: The bottom of the clutch mechanism housing (64) is provided with an annular groove (65), and the O-ring (70) is fixed in the annular groove (65).

5. The device for quickly starting a turbojet engine according to claim 1, wherein: The top of the clutch mechanism inner column (61) extending out of the clutch mechanism outer shell (64) is provided with a positioning hole perpendicular to the central axis of the clutch mechanism inner column (61), and the end of the motor shaft of the starter motor (10) extending into the inner cavity of the clutch mechanism inner column (61) is provided with a threaded hole, and a flat head screw (50) passes through the positioning hole and is connected to the threaded hole to fix the motor shaft of the starter motor (10) and the clutch mechanism inner column (61).

6. The device for quickly starting a turbojet engine according to claim 1, wherein: A thrust bearing (40) is provided between the motor shaft of the starter motor (10) and the inner cavity of the inner column (61) of the clutch mechanism.

7. The device for quickly starting a turbojet engine according to claim 1, wherein: The starter motor (10) is fixed to the starter motor bracket (20) via a hexagon socket head screw (30).

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