CN118148782A - Turbine type starter power transmission assembly and turbine type starter - Google Patents

Abstract

The invention provides a turbine starter power transmission assembly and a turbine starter, wherein the turbine starter power transmission assembly comprises a turbine shell, a spline connecting shaft, a sun shaft, a bearing set and a shaft seal, wherein one end of the spline connecting shaft is connected with the sun shaft, and the other end of the spline connecting shaft is connected with external torque; the other end of the sun shaft is connected with a planet wheel, and the bearing group and the shaft seal are sleeved on the sun shaft; the shaft seal is positioned and installed between the bearing group and the planet carrier, and the inner end face of the shaft seal is abutted with the outer end face of the sun shaft. According to the turbine starter power transmission assembly, the shaft seal is arranged between the bearing group and the planet carrier to achieve the double-sided sealing effect, the shaft seal is limited by the bearing group and the planet carrier, and the inner wall of the shaft seal is directly abutted to the sun shaft, so that a distance sleeve or a shoulder is not required to be arranged at the position of the shaft seal, the sealing diameter of the shaft seal can be reduced, the linear speed of the shaft seal is reduced, and the use reliability of the shaft seal is improved.

Description

Turbine type starter power transmission assembly and turbine type starter

Technical Field

The invention relates to the technical field of turbine starters, in particular to a turbine starter power transmission assembly and a turbine starter.

Background

The principle of the compressed air turbine starter is that the compressed air drives a turbine rotor to generate power, and the power is output after torque is increased through a planetary reducer to drive a diesel engine flywheel.

The planet speed reduction needs lubrication, so that the lubricating oil in the planet speed reduction box and compressed air at the turbine are prevented from leaking mutually, the sun gear needs to be provided with a shaft seal, the shaft seal is arranged on the sun shaft in the prior art in a mode of a distance sleeve and a shoulder, and therefore the linear speed at the shaft seal is increased, and the reliability of the shaft seal is reduced.

Based on this, the present inventors have proposed a turbo-starter power transmission assembly and a turbo-starter, so as to solve the above-mentioned technical problems.

Disclosure of Invention

The invention aims to overcome the defect that the reliability of a shaft seal is reduced due to the fact that the linear speed at the shaft seal is increased in the prior art, and provides a power transmission assembly of a turbine starter and the turbine starter.

The invention solves the technical problems by the following technical proposal:

in a first aspect, the present invention provides a turbine starter power transmission assembly comprising:

The device comprises a turbine shell, a spline connecting shaft, a sun shaft, a bearing set and a shaft seal, wherein one end of the spline connecting shaft is connected with the sun shaft, and the other end of the spline connecting shaft is connected with external torque; the other end of the sun shaft is connected with a planet wheel, and the bearing group and the shaft seal are sleeved on the sun shaft; wherein,

The shaft seal is positioned and installed between the bearing group and the planet carrier, and the inner end face of the shaft seal is abutted with the outer end face of the sun shaft.

According to one embodiment of the invention, a shaft sleeve is further arranged outside the shaft seal, and the shaft seal sleeve is sleeved outside the shaft seal and clamped between the turbine housing and the planet carrier;

the shaft seal is a bidirectional shaft seal.

According to one embodiment of the invention, the shaft seal is provided with a shaft seal part at two opposite sides along the axial direction;

the shaft seal part is in an arc-shaped arrangement.

According to one embodiment of the invention, the bearing set comprises a first bearing and a second bearing arranged adjacent to each other in the axial direction of the sun shaft, the first bearing and the second bearing being arranged close to the shaft seal.

According to one embodiment of the invention, two sides of the first bearing and the second bearing are respectively provided with a waveform spring seat, waveform springs are arranged in the waveform spring seats, and one of the waveform springs is abutted against the shaft seal sleeve.

According to one embodiment of the invention, a locking assembly is arranged between the first bearing and the second bearing, and the locking assembly comprises a distance locking clamp sleeved on the sun shaft and a distance sleeve ring sleeved outside the distance locking clamp.

According to one embodiment of the invention, the outer side of the sun shaft is provided with a positioning groove, and the outer side of the sun shaft is also provided with rotation stopping grooves at two sides of the positioning groove;

The fixed-distance lock clamp is sleeved outside the positioning groove and is lapped on the rotation stopping groove, a rotation stopping plane is further arranged on the outer periphery side of the fixed-distance lock clamp, and a matching surface matched with the rotation stopping plane is arranged on the inner side of the fixed-distance sleeve ring.

According to one embodiment of the invention, the first bearing and the second bearing are angular contact bearings.

In a second aspect, the present invention also provides a turbo-starter, which is characterized by comprising:

the speed reduction assembly comprises a planet carrier, wherein at least one planet wheel is arranged in the planet carrier;

In the turbine starter power transmission assembly, one end of the sun shaft is meshed with the planet gears.

According to one embodiment of the invention, the planet carrier and the turbine housing are detachably connected by means of a threaded connection.

The invention has the positive progress effects that:

According to the turbine starter power transmission assembly, the shaft seal is arranged between the bearing group and the planet carrier, so that the double-sided sealing effect can be achieved, the shaft seal is limited by the bearing group and the planet carrier, and the inner wall of the shaft seal is directly abutted against the sun shaft, so that a distance sleeve or a shoulder is not required to be arranged at the position of the shaft seal, the sealing diameter of the shaft seal can be reduced, the linear speed of the shaft seal is reduced, and the use reliability of the shaft seal is improved.

The turbine starter provided by the invention comprises the turbine starter power transmission assembly, so that the turbine starter power transmission assembly has all beneficial effects and is not described herein.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is a partial cross-sectional view of a turbo-starter of the present invention;

FIG. 2 is a schematic view of a portion of the sun shaft of FIG. 1;

fig. 3 is a cross-sectional view of the sun shaft of the present invention at the lock assembly.

1. A turbine housing; 11. a seal ring;

2. A spline connecting shaft;

3. a sun shaft; 31. a positioning groove; 32. a rotation stopping groove;

4. A bearing set; 41. a first bearing; 42. a second bearing; 43. a wave spring seat; 44. a locking assembly; 45. a distance locking clamp; 46. a distance collar; 47. a rotation stopping plane; 48. a mating surface; 49. a wave spring; 491. a baffle;

5. a shaft seal; 51. a shaft sleeve; 52. a shaft seal part;

7. a deceleration assembly; 71. a planet carrier; 72. and (3) a planet wheel.

Detailed Description

The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Referring to fig. 1 to 3, the present invention provides a turbine starter power transmission assembly, which comprises a turbine housing 1, a spline connection shaft 2, a sun shaft 3, a bearing set 4 and a shaft seal 5, wherein one end of the spline connection shaft 2 is connected with the sun shaft 3, and the other end is connected with external torque. The other end of the sun shaft 3 is connected with a planet wheel 72, and the bearing set 4 and the shaft sleeve 51 are arranged on the sun shaft 3. Wherein, the shaft seal 5 is positioned and installed between the bearing group 4 and the planet carrier 71, and the inner end surface of the shaft seal 5 is abutted with the outer end surface of the sun shaft 3.

The turbine shell 1 is internally provided with a mounting channel, the spline connecting shaft 2, the sun shaft 3, the bearing group 4 and the shaft seal 5 are all arranged in the mounting channel, one end of the spline connecting shaft 2 is in threaded connection with the sun shaft 3, and the other end of the spline connecting shaft is used for connecting external torque so as to drive the sun shaft 3 to rotate. One end of the sun shaft 3 is in threaded fit with the spline shaft, the other end of the sun shaft extends to the planetary gear 72, power generated by the turbine achieves speed and torque reduction through planetary reduction, the planetary reduction is in a form of fixing a planetary carrier 71 and rotating a gear ring, three planetary gears 72 are arranged in the planetary carrier 71 for illustration, the specific number of the planetary gears 72 is not limited, and the sun gear transmits power to the gear ring through the three planetary gears 72.

It should be noted that, the mating end of the sun shaft 3 and the planet gears 72 is provided with a sun gear, and lubricating oil is needed in the meshing rotation process of the sun gear and the three planet gears 72, so that in order to avoid the lubricating oil flowing to one side of the bearing set 4, a shaft seal 5 is needed to be arranged in the space between the planet gears 72 and the bearing set 4. The shaft seal 5 is designed on the sun shaft 3, and meanwhile, the shaft seal 5 arranged on the sun shaft 3 is also used for isolating compressed air in the turbine housing 1 from flowing to the planet carrier 71 side, so that the shaft seal 5 has a double-sided sealing effect.

In order to realize high power, the turbine needs high rotating speed and high torque, so that the shaft diameter of the sun shaft 3 is increased, and the corresponding linear speed is increased, if a distance sleeve or a convex shoulder is arranged on the sun shaft 3 in the prior art, the linear speed at the shaft seal 5 is higher, and the operation stability at the shaft seal 5 is reduced and the reliability is reduced. That is, the higher the linear velocity, the higher the requirement for the high temperature resistance of the shaft seal 5, and the higher the requirement for the installation stability between the shaft seal 5 and the sun shaft 3.

Based on this, the shaft seal 5 provided by the invention is positioned and installed between the bearing group 4 and the planet carrier 71, and the installation position of the shaft seal 5 is limited by the bearing group 4 and the planet carrier 71. Therefore, a distance sleeve or a shoulder is not required to be arranged on the sun shaft 3 to position the shaft seal 5, so that the linear speed at the shaft seal 5 is reduced, the use reliability of the shaft seal 5 is improved, and the shaft diameter of the sun shaft 3 is reduced.

In one embodiment, the shaft seal 5 is further provided with a shaft sleeve 51, the shaft sleeve 51 is sleeved outside the shaft seal 5 and is clamped between the turbine housing 1 and the planet carrier 71, and the shaft seal 5 is of a bidirectional sealing structure.

That is, a clamping space is formed between the shaft seal sleeve 51 and the planet carrier 71, and then the shaft seal 5 is installed in the clamping space, because the shaft seal 5 is a bidirectional seal, and the lubricating oil on the side of the planet carrier 71 does not flow to the side of the bearing set 4; at the same time, the compressed air on the bearing set 4 side does not flow to the carrier 71 side.

Specifically, the shaft seal 5 is provided with a shaft seal portion 52 on each of opposite sides in the axial direction thereof, and the shaft seal portion 52 is provided in an arc shape.

That is, the arc-shaped shaft seal portion 52 is beneficial to guiding the lubricating oil or compressed air flowing to the shaft seal portion 52, and disperses the stress at the shaft seal portion 52, thereby improving the stability of the shaft seal 5 and sealing effect.

Further, a seal ring 11 is also installed between the turbine housing 1 and the shaft seal sleeve 51, thereby ensuring sealability between the turbine housing 1 and the shaft seal sleeve 51.

In one embodiment, the bearing set 4 includes a first bearing 41 and a second bearing 42 disposed adjacent to each other in the axial direction of the sun shaft 3, the first bearing 41 and the second bearing 42 being disposed adjacent to the shaft seal 5.

Specifically, the first bearing 41 and the second bearing 42 are both angular contact bearings.

In order to optimize the load balancing performance of the sun gear and the planet gears 72, the sun gear is supported by adopting the angular contact bearings which are installed face to face nearby, the first bearing 41 and the second bearing 42 are arranged on the same side of the gear of the sun gear, and meanwhile, the hollow structure of the gear area of the sun gear can reduce the supporting rigidity of the sun gear to the greatest extent, and the load balancing self-adaption of the planet gears 72 is better.

That is, the sun shaft 3 has a sun gear on a side facing the planetary gears 72, and one end of the sun shaft 3 is cantilever-supported by the first bearing 41 and the second bearing 42, and the other end of the sun gear is engaged with the three planetary gears 72.

In the conventional scheme, the two bearings are spaced apart at a large distance and are arranged at opposite ends of the sun shaft 3, so that the supporting force provided by the sun gear is relatively stable, and the sun shaft 3 is very poor in axial deflection flexibility under the support of the two bearings. That is, when the sun shaft 3 is mounted in the turbine housing 1, the axial direction of the sun shaft 3 is completely defined, and there are manufacturing errors and assembly errors, particularly assembly errors, when the sun shaft 3 is fitted with the plurality of planetary gears 72, because the plurality of planetary gears 72 are mounted in the ring gear, there is a possibility that the sun gear at the end of the sun shaft 3 is not exactly engaged with the planetary gears 72 when fitted. For example, tightly meshed with one of the planetary gears 72 while being in merely lap-meshed engagement with the other planetary gear 72, because of occurrence of uneven load transmission between the sun gear and the planetary gear 72.

That is, since there is a manufacturing and assembling error, there is inevitably a case where the contact load is uneven between the planetary reduction sun gear and the plurality of planetary gears 72, and since the torque is large, in order to improve the operational reliability of the sun gear and the planetary gears 72, the first bearing 41 and the second bearing 42 are adjacently disposed with a small pitch, and the bearing group 4 is cantilever-supported, the sun shaft 3 is in a clearance fit state with the first bearing 41 and the second bearing 42, so that the sun shaft 3 is advantageous to be self-adjusted to an optimal state when the sun gear is engaged with the three planetary gears 72, so that the three planetary gears 72 are in an even load state.

That is, the axial direction of the sun shaft 3 is not determined at the initial stage of installation, but the axial direction is adaptively adjusted in cooperation with the sun gear and the planetary gear 72, thereby optimizing the load uniformity of the sun gear and the planetary gear 72.

In one embodiment, one wave spring seat 43 is arranged on each side of the first bearing 41 and the second bearing 42, a wave spring 49 is arranged in the wave spring seat 43, and one of the wave springs 49 is abutted against the shaft seal sleeve 51.

That is, during the starting process of the starter, which is operated under different loads and rotational speeds, in order to avoid no-load slip failure of the first bearing 41 and/or the second bearing 42 and to improve reliability, it is necessary to apply a basic axial preload to the first bearing 41 and the second bearing 42, and correspondingly, to provide a wave spring 49 in a compressed state on each of the opposite sides of the bearing set 4.

The side of the wave spring seat 43 facing the first bearing 41 is further provided with a shutter 491, and the shutter 491 is used for axially positioning the first bearing 41 in cooperation with the wave spring 49.

In one embodiment, a locking assembly 44 is provided between the first bearing 41 and the second bearing 42, the locking assembly 44 comprising a split distance lock clip 45 sleeved on the sun shaft 3 and a distance collar 46 sleeved outside the distance lock clip 45.

The sun shaft 3 and the first bearing 41 and the second bearing 42 transmit axial force through the fixed-distance locking clamp 45, and compared with a check ring for a standard shaft in the prior art, the fixed-distance locking clamp 45 has good structural symmetry, has small unbalanced force during high-speed rotation, and is beneficial to reducing bearing load; moreover, torque is transmitted between the distance lock clips 45 and the sun shaft 3 through surface contact, so that slipping and abrasion during acceleration are avoided.

Referring to fig. 2 and 3, specifically, a positioning groove 31 is formed on the outer side of the sun shaft 3, and rotation stopping grooves 32 are formed on two sides of the positioning groove 31 on the outer side of the sun shaft 3; the distance lock clamp 45 is sleeved outside the positioning groove 31 and is lapped on the rotation stopping groove 32, a rotation stopping plane 47 is further arranged on the outer periphery side of the distance lock clamp 45, and a matching surface 48 matched with the rotation stopping plane 47 is arranged on the inner side of the distance sleeve ring 46.

That is, the outside of the distance lock clip 45 is also hooked by the distance collar 46, and the distance collar 46 and the distance lock clip 45 are not separated by the centrifugal force generated by rotation due to the engagement of the rotation stop plane 47 and the engagement surface 48.

Specifically, when the sun shaft 3 rotates and receives an axial force, the axial force is transmitted to the first bearing 41 or the second bearing 42 via the distance lock clip 45.

For example, when the sun shaft 3 moves axially toward the spline connection shaft 2, axial force is transmitted to the first bearing 41 via the distance lock clip 45, the first bearing 41 is forced to further compress the wave spring 49 in the wave spring seat 43, and the wave spring 49 limits the movement of the first bearing 41. At the same time, the second bearing 42 generates an axial force under the abutment of the other wave spring 49, avoiding no load and slipping of the second bearing 42.

Further, the principle of the movement of the sun shaft 3 toward the planet gear 72 is the same as the above principle, and will not be described here.

In summary, according to the turbine type starter power transmission assembly, the shaft seal 5 is arranged between the bearing group 4 and the planet carrier 71, so that a double-sided sealing effect can be achieved, and the shaft seal 5 is limited by the bearing group 4 and the planet carrier 71, and the inner wall is directly abutted against the sun shaft 3, so that a distance sleeve or a shoulder is not required to be arranged at the position of the shaft seal 5 by the sun shaft 3, the sealing diameter of the shaft seal 5 can be reduced, the linear speed of the shaft seal 5 is reduced, and the use reliability of the shaft seal 5 is improved.

In order to optimize the load balancing of the sun gear and the planet gears 72, the sun gear is supported by a pair of face-to-face mounted first bearings 41 and second bearings 42, the first bearings 41 and second bearings 42 being on the same side of the sun gear, facilitating the transfer of the sun gear to the load balancing of the plurality of planet gears 72.

The invention also provides a turbine starter, which comprises a speed reduction assembly 7 and the turbine starter power transmission assembly, wherein the speed reduction assembly 7 comprises a planet carrier 71 and three planet gears 72 arranged in the planet carrier 71, and one end of a sun shaft 3 in the turbine starter power transmission assembly is meshed with the planet gears 72.

Wherein the planet carrier 71 and the turbine housing 1 are detachably connected through a threaded connection, thereby facilitating disassembly and maintenance of the internal structures of the turbine starter power transmission assembly and the reduction assembly 7.

Because the turbo starter comprises the turbo starter power transmission assembly, the turbo starter has all the beneficial effects of the turbo starter power transmission assembly, and the description is omitted herein.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; but also mechanical connection, and the specific meaning of the above terms in the embodiments of the present application will be understood by those skilled in the art according to the specific circumstances.

The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.

Claims (10)

1. A turbine starter power transmission assembly, comprising:

The device comprises a turbine shell, a spline connecting shaft, a sun shaft, a bearing set and a shaft seal, wherein one end of the spline connecting shaft is connected with the sun shaft, and the other end of the spline connecting shaft is connected with external torque; the other end of the sun shaft is connected with a planet wheel, and the bearing group and the shaft seal are sleeved on the sun shaft; wherein,

The shaft seal is positioned and installed between the bearing group and the planet carrier, and the inner end face of the shaft seal is abutted with the outer end face of the sun shaft.

2. The turbine starter power transmission assembly of claim 1, wherein a shaft sleeve is further provided outside the shaft seal, and the shaft seal sleeve is sleeved outside the shaft seal and is clamped between the turbine housing and the planet carrier;

the shaft seal is a bidirectional shaft seal.

3. The turbine starter power transmission assembly of claim 2 wherein the shaft seal is provided with a shaft seal portion on each of opposite sides in the axial direction thereof;

the shaft seal part is in an arc-shaped arrangement.

4. The turbine starter power transmission assembly of claim 2 wherein the bearing set includes a first bearing and a second bearing disposed axially adjacent the sun shaft, the first bearing and the second bearing disposed proximate the shaft seal.

5. The turbine starter power transmission assembly of claim 4, wherein one wave spring seat is disposed on each of two sides of the first bearing and the second bearing, a wave spring is disposed in the wave spring seat, and one of the wave springs is abutted against the shaft seal sleeve.

6. The turbine starter power transmission assembly of claim 5, wherein a locking assembly is disposed between the first bearing and the second bearing, the locking assembly including a distance lock clip sleeved on the sun shaft and a distance collar sleeved outside the distance lock clip.

7. The turbine starter power transmission assembly of claim 6, wherein a positioning groove is formed on the outer side of the sun shaft, and a rotation stopping groove is formed on the outer side of the sun shaft on two sides of the positioning groove;

The fixed-distance lock clamp is sleeved outside the positioning groove and is lapped on the rotation stopping groove, a rotation stopping plane is further arranged on the outer periphery side of the fixed-distance lock clamp, and a matching surface matched with the rotation stopping plane is arranged on the inner side of the fixed-distance sleeve ring.

8. The turbine starter power transmission assembly of claim 4 wherein the first bearing and the second bearing are angular contact bearings.

9. A turbo-starter, comprising:

the speed reduction assembly comprises a planet carrier, wherein at least one planet wheel is arranged in the planet carrier;

The turbo-starter power transmission assembly of any one of claims 1-8, the sun shaft having one end in engagement with the planet gears.

10. The turbostarter of claim 9 wherein the planet carrier and turbine housing are removably connected by a threaded connection.