Device for preventing main shaft of air compressor from rotating reversely

Abstract

The utility model discloses a device for preventing a main shaft of an air compressor from rotating reversely, which can prevent the main shaft of the air compressor from rotating reversely. A device for preventing a spindle of an air compressor from rotating reversely comprises a base, a screw shaft, a screw sleeve and a spindle system, the base is provided with a flat plate and a vertical plate, the spindle system is fixed on the flat plate of the base, the screw sleeve is horizontally arranged on the vertical plate of the base, and the screw shaft is in threaded fit with the screw sleeve to form a lead screw nut structure. One end of the screw shaft is circumferentially positioned with the output end of the main shaft system, the screw shaft can axially slide relative to the output end of the main shaft system, and when the rotating direction of the main shaft system is correct, the screw shaft can be screwed into the screw sleeve and separated from the main shaft system; when the rotation direction of the main shaft system is wrong, the screw sleeve brakes the screw shaft and the main shaft system.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical engineering technical field especially is related to a device that prevents air compressor main shaft reverse rotation. BACKGROUND

[0002] Fuel cell technology is a new type of clean energy technology, with its high efficiency, no pollution, low noise, renewable and other advantages gradually by people's attention. In the past few decades, fuel cell technology has been rapid development, and has been applied to many fields, such as cars, power plants, mobile devices, etc.

[0003] As one of the important development directions of future clean energy field, fuel cell technology, with the updating of technical innovation, application promotion, industry chain collaborative development and intelligent application and other technical means, its development prospect is very broad.

[0004] Air compressor as one of the key auxiliary systems of fuel cell, can effectively improve the power density of fuel cell, reduce the size and weight of fuel cell whole machine, improve the performance of fuel cell whole machine. Due to its special application field, usually requires oil-free lubrication, use belongs to precision manufacturing air bearing system. Due to the lack of pre-lubrication and its special structure, the reverse rotation of the main shaft is more likely to damage the air bearing, thereby causing more serious damage to the air compressor, which seriously reduces the reliability and safety of the air compressor.

[0005] And the three-phase line of the motor is reversed, which can cause the reverse rotation of the main shaft of the motor. The reverse rotation of the main shaft cannot be completely avoided during the design and manufacture of the motor. The usual solution is to expose the main shaft to low speed operation, determine the rotation direction of the main shaft by visual observation, stop the machine to adjust the rotation direction, and complete the installation of the remaining parts, so that the subsequent test work can be carried out. The method of determining the rotation direction of the main shaft has certain safety hazards, the operation is complex, and the air bearing is easy to be damaged.

[0006] Therefore, it is very important to design a device that can eliminate the safety hazards in the traditional method and prevent the reverse rotation of the main shaft. SUMMARY

[0007] The utility model discloses a device that prevents air compressor main shaft reverse rotation can prevent the reverse rotation of the main shaft of air compressor.

[0008] The utility model discloses a device that prevents air compressor main shaft reverse rotation can prevent the reverse rotation of the main shaft of air compressor.

[0009] The utility model provides a device for preventing the reverse rotation of the main shaft of an air compressor, comprising a base, a screw rod shaft, a screw rod sleeve and a main shaft system, the base has a flat plate and a vertical plate, the main shaft system is fixed to the flat plate of the base, the screw rod sleeve is horizontally arranged on the vertical plate of the base, the screw rod shaft is threadedly connected to the screw rod sleeve to form a screw rod nut structure, one end of the screw rod shaft is circumferentially positioned to the output end of the main shaft system and can axially slide relative to the output end of the main shaft system, when the rotation direction of the main shaft system is correct, the screw rod shaft can be screwed into the screw rod sleeve and separated from the main shaft system, and when the rotation direction of the main shaft system is incorrect, the screw rod sleeve brakes the screw rod shaft and the main shaft system.

[0010] Preferably, the screw rod sleeve is fixedly installed on the base by bolts.

[0011] Preferably, one end of the screw rod shaft adjacent to the main shaft system is provided with a radial strip-shaped groove, and the output end of the main shaft system is correspondingly provided with a strip-shaped boss which is slidingly fitted in the strip-shaped groove.

[0012] Thanks to the above technical scheme, the utility model has the following beneficial effects:

[0013] 1. The device can prevent the reverse rotation of the main shaft, eliminate safety hazards and avoid damage to bearings and other components caused by the reverse rotation of the main shaft.

[0014] 2. When the rotation direction of the main shaft is correct, the subsequent test work can be continued without stopping the machine.

[0015] 3. The rotation direction of the main shaft can be confirmed after the complete assembly of the machine, and the machine does not need to be assembled multiple times. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a structure schematic view.

[0017] REFERENCE NUMERALS

[0018] In the drawings, 1 is a base, 2 is a screw rod shaft, 3 is a screw rod sleeve, and 4 is a main shaft system. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0020] For example, Figure 1As shown, the device for preventing the reverse rotation of the main shaft of the air compressor of the utility model embodiment, including: base 1, screw rod shaft 2, screw rod sleeve 3, main shaft system 4, main shaft system 4 is air compressor and related transmission structure. The base 1 has flat plate, stand, the main shaft system 4 is fixed on the flat plate of base 1, and the screw rod sleeve 3 is horizontally arranged on the stand of base 1, the screw rod shaft 2 is threadedly matched with screw rod sleeve 3, forms screw rod nut structure, and one end of screw rod shaft 2 is circumferentially positioned with the output end of main shaft system 4, and screw rod shaft 2 can axially slide relative to the output end of main shaft system 4, when the rotation direction of main shaft system 4 is correct, screw rod shaft 2 can rotate into screw rod sleeve 3, and is separated from main shaft system 4, when the rotation direction of main shaft system 4 is incorrect, screw rod sleeve 3 brakes screw rod shaft 2, main shaft system 4.

[0021] Specifically:

[0022] Screw rod shaft 2 is matched with the inner thread of screw rod sleeve 3 through the outer thread, when screw rod shaft 2 rotates with main shaft system 4, by the rotation of the thread of screw rod sleeve 3, screw rod shaft 2 can axially move. When the rotation direction of main shaft system 4 is correct, by the rotation of the thread of screw rod sleeve 3 and screw rod shaft 2, screw rod shaft 2 axially moves and is separated from main shaft system 4, after complete separation, screw rod shaft 2 continues to axially displace a small distance due to rotational inertia and then stops, and a safe distance is kept with main shaft system 4, and main shaft system 4 does not need to stop and can continue subsequent test work. If the rotation direction of main shaft system 4 is incorrect, the axial movement of screw rod shaft 2 is limited by thread, and screw rod shaft 2 cannot rotate, that is, main shaft system 4 cannot rotate. The device can replace the thread rotation direction (left rotation / right rotation) of screw rod sleeve 3 and screw rod shaft 2 according to the different correct rotation directions of main shaft system 4, to prevent the reverse rotation of main shaft system 4.

[0023] In the embodiment, the one end adjacent to main shaft system 4 of screw rod shaft 2 is provided with a radial strip-shaped groove, and the output end of main shaft system 4 is correspondingly provided with a strip-shaped boss, and the strip-shaped boss is slidingly fitted in the strip-shaped groove. Of course, the connecting structure of screw rod shaft 2 and main shaft system 4 can be other forms, for example, the slidingly fitted circumferential positioning mode of spline fit.

[0024] Finally, it is explained that the above preferred embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail through the above preferred embodiments, but those skilled in the art should understand that various changes can be made in form and details without departing from the range defined by the claims of the utility model.

Claims

1. A device for preventing reverse rotation of an air compressor main shaft, characterized by: The utility model relates to a screw rod sleeve, a screw rod axle and a main shaft system, the screw rod sleeve is fixedly installed on the vertical plate of the base, the screw rod axle is screwed with the screw rod sleeve and forms the screw rod nut structure, one end of the screw rod axle is positioned with the output end of the main shaft system in the circumference, and the screw rod axle can slide axially relative to the output end of the main shaft system, when the rotating direction of the main shaft system is correct, the screw rod axle can rotate into the screw rod sleeve and is separated from the main shaft system, when the rotating direction of the main shaft system is wrong, the screw rod sleeve brakes the screw rod axle and the main shaft system.

2. A device for preventing the reverse rotation of the main shaft of an air compressor according to claim 1, characterized in that: The screw rod sleeve is fixedly installed on the base through bolts.

3. A device for preventing reverse rotation of the main shaft of an air compressor according to claim 1, characterized in that: The end adjacent to the main shaft system of the screw rod axle is provided with a radial strip-shaped groove, and the output end of the main shaft system is correspondingly provided with a strip-shaped boss which is slidingly fitted in the strip-shaped groove.

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