Multi-shaft centrifugal compressor step-up gear box

Abstract

The utility model discloses a step-up gear box of a multi-shaft centrifugal compressor. The step-up gear box comprises a box body, supporting plates symmetrically installed in the box body, a main gear and a connecting rod, wherein the main gear and the connecting rod are installed between the supporting plates, and a first-stage gear set, a second-stage gear set, a third-stage gear set and a fourth-stage gear set which are meshed with the main gear are further arranged between the supporting plates. The auxiliary gear can be quickly locked or released when necessary through the matching of the lock pin and the spring; when the air cylinder does not work, the spring can automatically push out the lock pin to enable the pin shaft to move, separation of the auxiliary gear and the main gear is achieved, unnecessary mechanical connection is prevented, the spring further plays a certain buffering role, the influence of impact loads on the gears is reduced, and equipment is protected. The spring ensures the flexibility and safety of the gearbox, so that the gear sets can be quickly and safely separated in the non-working state.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed increasing gear, specifically a multi-shaft centrifugal compressor speed increasing gear box. BACKGROUND

[0002] The multi-shaft centrifugal compressor speed increasing gear box plays a vital role in modern industry, and its main function is to convert the low-speed torque from a power source into high-speed torque suitable for the operation of a centrifugal compressor. Traditional speed increasing gear box designs usually use single or multi-stage gear systems to achieve the required transmission ratio. However, as industrial applications continue to demand higher efficiency, reliability, and flexibility, existing designs have gradually exposed some limitations.

[0003] In traditional speed increasing gear boxes, the load distribution between the gears is uneven, which can cause some components to bear excessive mechanical stress, thereby shortening the service life of the equipment and increasing maintenance costs. The fixed gear configuration limits the adaptability of the speed increasing gear box, making it difficult to quickly adjust to different operating conditions, which affects the range of equipment use. For multi-shaft centrifugal compressors, synchronization and coordination between the shafts are crucial. Existing designs sometimes do not perform optimally in this regard, especially when it comes to responding to sudden situations or load fluctuations. SUMMARY

[0004] The utility model aims to provide a multi-shaft centrifugal compressor speed increasing gear box to solve the above problems in the prior art.

[0005] Technical solution: A multi-shaft centrifugal compressor speed increasing gear box comprises:

[0006] a box body, support plates symmetrically installed inside the box body, a main gear installed between the support plates, and a connecting rod, wherein a first gear set, a second gear set, a third gear set, and a fourth gear set are also provided between the support plates and meshed with the main gear;

[0007] The first gear set, the second gear set, the third gear set, and the fourth gear set each include a pin shaft installed on the support plate, a pinion gear sleeved on the pin shaft, and a sleeve, wherein one end of the sleeve extending out of the support plate is provided with a centrifugal compressor installed on the box body, the sleeve is provided with a U-shaped hole, the U-shaped hole is provided with a locking pin inserted into the pin shaft, and a spring is sleeved on the sleeve between the locking pin and the support plate; the support plate at the pin shaft is provided with a bracket, and the bracket is provided with an air cylinder abutting against the pin shaft;

[0008] The centrifugal compressor in the first gear set is provided with a return pipe sequentially communicating with the second gear set, the third gear set, and the fourth gear set, and a cooler is provided between the return pipe and two gear sets; each centrifugal compressor is provided with an independent air inlet and an air outlet.

[0009] In further embodiments, the main gear is movably connected with the support plate and the box body, and one end of the main gear is provided with a driving motor mounted on the box body.

[0010] In further embodiments, the first gear set, the second gear set, the third gear set and the fourth gear set are evenly distributed on the outer surface of the main gear and are in mesh with the main gear, and the gear number ratio of the main gear to the first gear set, the second gear set, the third gear set and the fourth gear set is 3:1, 5:1, 4:1 and 3:1 respectively.

[0011] In further embodiments, the pin shaft is movably connected with the support plate, and the connecting rod is threadedly connected with the support plate.

[0012] In further embodiments, the pin shaft is in interference fit with the auxiliary gear, the sleeve is in clearance fit with the pin shaft, the pin shaft is movably connected with the support plate, the pin shaft is fixedly connected with the impeller in the centrifugal compressor, the locking pin is in interference fit with the pin shaft, and the locking pin extends out of the sleeve by a distance.

[0013] In further embodiments, the two ends of the spring are respectively abutted with the support plate and the locking pin, the support plates are threadedly connected with the support plate and the cylinder, and the output end of the cylinder is abutted with the pin shaft and is provided with a thrust bearing mounted on the output end of the cylinder.

[0014] Beneficial effects: the utility model discloses a multi -shaft centrifugal compressor speed -up gear box, through the cooperation of locking pin and spring, can lock or release auxiliary gear in necessary time quickly, when the cylinder does not work, the spring will automatically push the locking pin out, make the pin shaft move, realize the separation of auxiliary gear and main gear, prevent unnecessary mechanical connection,

[0015] The spring also plays a certain buffering effect, reduces the influence of impact load on the gear, and protects the equipment, and the spring ensures the flexibility and safety of the gear box, so that the gear set can be rapidly and safely separated in the non-working state, the output end of the cylinder is abutted with the pin shaft, and is provided with a thrust bearing, the position of the auxiliary gear can be accurately adjusted, and the auxiliary gear is ensured to be in the best working state all the time.

[0016] The return pipe guides the gas compressed by the first gear set to subsequent gear sets in sequence, forming a complete gas treatment process, and the gear number ratio between the main gear and each gear set is 3:1, 5:1, 4:1 and 3:1, and the progressive speed-up makes each stage work under ideal conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a gear set distribution schematic diagram of the utility model.

[0018] Figure 2 It is the gear set structure schematic diagram of the utility model.

[0019] Figure 3 It is the gear set perspective view of the utility model.

[0020] Figure 4 It is the gear set front view of the utility model.

[0021] Figure 5 It is the gear set left view of the utility model.

[0022] Figure 6 It is the gear set top view of the utility model.

[0023] The figure mark is: 1, box body;2, support plate;3, connecting rod;4 backflow pipe;41, main gear;51, auxiliary gear;52, pin shaft;53, sleeve;54, lock pin;55, spring;56, impeller;521, support;531, U-shaped hole. Specific implementation

[0024] The utility model discloses a kind of multi-shaft centrifugal compressor speed increasing gear box, by the cooperation of lock pin and spring, auxiliary gear can be locked or released quickly when necessary;When cylinder does not work, spring will automatically push out lock pin, make pin shaft move, realize the separation of auxiliary gear and main gear, prevent unnecessary mechanical connection, spring also plays a certain buffering effect, reduce the influence of impact load to gear, protect equipment;Spring ensures the flexibility and safety of gear box, so that gear set can be quickly and safely separated in non-working state, the specific description of scheme is carried out below by specific embodiment.

[0025] Refer to Figures 1-6 As shown in a kind of multi-shaft centrifugal compressor speed increasing gear box, comprising:

[0026] Box body 1, support plate 2 symmetrically installed in the box body 1, main gear 4 backflow pipe;41 and connecting rod 3 are installed between the support plate 2;Connecting rod 3 is screw-connected with support plate 2;Between support plate 2, still be equipped with with main gear 4 backflow pipe;41 meshing first gear set, second gear set, third gear set and fourth gear set;First gear set, second gear set, third gear set and fourth gear set are evenly distributed on the outer surface of main gear 4 backflow pipe;41 and are all meshed with main gear 4 backflow pipe;41, main gear 4 backflow pipe;41 and the tooth number ratio of first gear set, second gear set, third gear set and fourth gear set are 3:1, 5:1, 4:1 and 3:1 respectively.

[0027] The primary gear set, secondary gear set, tertiary gear set and quaternary gear set each comprise a pin shaft 52 mounted on the support plate 2, a secondary gear 51 sleeved on the pin shaft 52 and a sleeve 53, the pin shaft 52 is movably connected with the support plate 2, the pin shaft 52 is fixedly connected with an impeller 56 in the centrifugal compressor, the locking pin 54 is in interference fit with the pin shaft 52, and the locking pin 54 extends out of the sleeve 53 by a distance.

[0028] The secondary gear 51 is in interference fit with the pin shaft 52, the sleeve 53 is in clearance fit with the pin shaft 52, one end of the sleeve 53 extending out of the support plate 2 is provided with the centrifugal compressor mounted on the box body 1, the sleeve 53 is provided with a U-shaped hole 531, the U-shaped hole 531 is provided with the locking pin 54 inserted into the pin shaft 52, the pin shaft 52 is movably connected with the support plate 2, and the locking pin 54 is provided between the support plate 2 and the sleeve 53; the two ends of the spring 55 are respectively abutted with the support plate 2 and the locking pin 54; the support plate 2 is provided with a support 521 at the pin shaft 52, the support 521 is threadedly connected with the support plate 2 and the cylinder, and the support 521 is provided with the cylinder abutting against the pin shaft 52; the output end of the cylinder is abutted with the pin shaft 52, and the contact position is provided with the thrust bearing mounted on the output end of the cylinder.

[0029] The centrifugal compressor in the primary gear set is provided with a return pipe sequentially communicating with the secondary gear set, the tertiary gear set and the quaternary gear set, and the return pipe is provided with a cooler between two gear sets; the centrifugal compressor is provided with independent air inlet and air outlet.

[0030] In further embodiments, the main gear 4 return pipe; 41 is movably connected with the support plate 2 and the box body 1, and one end of the main gear 4 return pipe; 41 is provided with the driving motor mounted on the box body 1.

[0031] Working principle: first, the cylinder is in a non-working state, the spring 55 pushes the locking pin 54 to extend out, so that the pin shaft 52 is kept separated from the secondary gear 51, and unnecessary mechanical connection between the main gear 4 return pipe; 41 and each gear set is ensured; the driving motor starts to work, and power is transmitted to the main gear 4 return pipe; 41 through the shaft coupling or direct mounting mode; the cylinder is controlled to start, the output end of the cylinder pushes the pin shaft 52 to overcome the elastic force of the spring 55, so that the pin shaft 52 is fixed on the support plate 2, and the secondary gear 51 is tightly engaged with the main gear 4 return pipe; 41 to start normal power transmission.

[0032] After the pin shaft 52 is fixed, the primary gear set, the secondary gear set, the tertiary gear set and the quaternary gear set are respectively engaged with the main gear 4 return pipe; 41, forming a complete transmission chain; At this time, each gear set gradually increases the rotating speed according to the set gear ratio; The centrifugal compressor in the primary gear set inhales gas from an independent air inlet, and after preliminary compression by the primary impeller 56, the gas is guided to the return pipe, ready to enter the next stage of compression;

[0033] The return pipe guides the gas after the first-stage compression to the corresponding centrifugal compressors of the secondary gear set, the tertiary gear set and the quaternary gear set in turn, and a cooler is arranged between every two gear sets to reduce the gas temperature and prevent efficiency decline or material damage caused by high temperature;

[0034] The gas is sequentially compressed by the secondary, tertiary and quaternary stages, and the pressure of the gas is further increased at each stage to finally reach the required high-pressure state,

[0035] When shutdown is required, the cylinder stops supplying gas, and after losing pressure, the spring 55 returns to its original state, pushing the locking pin 54 out and forcing the pin shaft 52 to move along the sleeve 53, thereby separating the secondary gear 51 from the main gear 4 return pipe; 41, ensuring safe shutdown.

[0036] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various equivalent transformations can be made to the technical solutions of the utility model within the technical concept of the utility model, and these equivalent transformations all belong to the protection scope of the utility model.

Claims

1. A multi-shaft centrifugal compressor speed-increasing gearbox, comprising: The box, the support plate symmetrically installed in the box, the main gear and the connecting rod installed between the support plates, and the first gear set, the second gear set, the third gear set and the fourth gear set meshing with the main gear are arranged between the support plates; The first gear set, the second gear set, the third gear set and the fourth gear set each include a pin shaft installed on the support plate, a secondary gear sleeved on the pin shaft and a sleeve, one end of the sleeve extending out of the support plate is provided with a centrifugal compressor installed on the box, the sleeve is provided with a U-shaped hole, the U-shaped hole is provided with a locking pin inserted into the pin shaft, and the locking pin and the support plate are provided with a spring sleeved on the sleeve; the support plate at the pin shaft is provided with a bracket, and the bracket is provided with a cylinder abutting against the pin shaft; The centrifugal compressor in the first gear set is provided with a return pipe sequentially communicating with the second gear set, the third gear set and the fourth gear set, and the return pipe is provided with a cooler between two gear sets; the centrifugal compressor is provided with independent air inlets and air outlets.

2. A multi-shaft centrifugal compressor up-gearbox according to claim 1, characterized in that: The main gears are movably connected with the support plates and the box, and one end of the main gear is provided with a driving motor installed on the box.

3. A multi-shaft centrifugal compressor up-gearbox according to claim 1, characterized in that: The first gear set, the second gear set, the third gear set and the fourth gear set are uniformly distributed on the outer surface of the main gear and mesh with the main gear, and the gear number ratio of the main gear to the first gear set, the second gear set, the third gear set and the fourth gear set is 3:1, 5:1, 4:1 and 3:1 respectively.

4. A multi-shaft centrifugal compressor up-gearbox according to claim 1, characterized in that: The pin shaft is movably connected with the support plate, and the connecting rod is threadedly connected with the support plate.

5. A multi-shaft centrifugal compressor up-gearbox according to claim 1, characterized in that: The secondary gear is interference-fitted with the pin shaft, the sleeve is clearance-fitted with the pin shaft, the pin shaft is movably connected with the support plate, the pin shaft is fixedly connected with the impeller in the centrifugal compressor, the locking pin is interference-fitted with the pin shaft, and the locking pin extends out of the sleeve by a distance.

6. A multi-shaft centrifugal compressor up-gearbox according to claim 1, characterized in that: The two ends of the spring are respectively abutted against the support plate and the locking pin; the bracket is threadedly connected with the support plate and the cylinder, and the output end of the cylinder is abutted against the pin shaft and is provided with a thrust bearing installed on the output end of the cylinder.

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