CN-121977413-A - Transmission shaft axial clearance measuring device and method

CN121977413ACN 121977413 ACN121977413 ACN 121977413ACN-121977413-A

Abstract

The invention discloses a device and a method for measuring axial clearance of a transmission shaft, which belong to the technical field of detection of transmission shafts of underwater propulsion systems of diesel outboard engines, and comprise a measurement mounting seat, a fixing component for fixing the measurement mounting seat, a measurement component for detecting clearance data and a locking component for locking the measurement component; the measuring installation seat is provided with a connecting hole site matched with the installation structure of the reduction gearbox assembly and an installation hole site for installing a measuring component, the measuring component comprises a measuring meter and a measuring extension probe, the measuring extension probe penetrates through the installation hole site and is used for abutting against a thrust surface of the transmission shaft, the measuring meter is contacted with one end, far away from the transmission shaft, of the measuring extension probe, the locking component is connected with the measuring installation seat and is used for fixing the position of the measuring meter, and the measuring installation seat is fixedly connected with the reduction gearbox assembly through a fixing component. The invention can solve the problems of large measurement error, complex operation, poor data consistency and the like in the traditional measurement method.

Inventors

YAO JIACHENG
WANG YUXUAN
SHEN CHANGLE
WANG YUNFEI
WEI ZIHAN
XU ZHICHEN
MENG QINGFENG
DONG CHANGLONG
LIU YANJUN
LU YANG

Assignees

河北华北柴油机有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260208

Claims (7)

1. The transmission shaft axial clearance measuring device is characterized by comprising a measuring installation seat (1) which is in fit connection with a diesel outboard engine reduction gearbox assembly (8), a fixing component used for fixing the measuring installation seat (1), a measuring component used for detecting clearance data and a locking component used for locking the measuring component, wherein the measuring installation seat (1) is provided with a connecting hole site which is in fit connection with the installation structure of the reduction gearbox assembly (8) and an installation hole site (11) used for installing the measuring component; The measuring assembly comprises a measuring meter (5) and a measuring extension probe (6), wherein the measuring extension probe (6) penetrates through the mounting hole site (11) and is used for abutting against a thrust surface of the thrust bearing (9), the measuring meter (5) is in contact with one end, far away from the thrust bearing (9), of the measuring extension probe (6), the locking assembly is connected with the measuring mounting seat (1) and used for fixing the position of the measuring meter (5), and the measuring mounting seat (1) is fixedly connected with the reduction gearbox assembly (8) through the fixing assembly.
2. The axial clearance measuring device for the transmission shaft according to claim 1, wherein the connecting hole site of the measuring installation seat (1) comprises an installation fixing hole (12), a transmission shaft hole (13) and a thrust bearing hole (14), wherein the installation fixing hole (12) is aligned with a preset installation hole of the reduction gearbox assembly (8), the transmission shaft hole (13) is used for the transmission shaft (7) to penetrate through, and the thrust bearing hole (14) is matched with the thrust bearing (9) of the transmission shaft.
3. The transmission shaft axial clearance measuring device according to claim 2, wherein the fixing component comprises a fixing bolt (2) and a sealing ring (3), and the fixing bolt (2) penetrates through the mounting fixing hole (12) and locks and fixes the measuring mounting seat (1) on the reduction gearbox assembly (8).
4. The axial clearance measuring device for the transmission shaft according to claim 1, wherein the mounting hole position (11) of the measuring mounting seat (1) comprises a mounting hole of the measuring meter (5), the axis of the mounting hole of the measuring meter (5) is parallel to the axis of the transmission shaft (7), and the measuring extension probe (6) can move along the axis direction of the mounting hole of the measuring meter (5).
5. The transmission shaft axial clearance measuring device according to claim 1, wherein the locking assembly comprises a locking bolt (4), a locking bolt hole (15) communicated with a mounting hole of the measuring meter (5) is formed in the measuring mounting seat (1), and the locking bolt (4) is screwed into the locking bolt hole (15) and abuts against the outer wall of the measuring meter (5).
6. A method of measuring axial clearance of a drive shaft, characterized in that a measuring device according to any one of claims 1-5 is used, comprising the steps of: s1, mounting a thrust bearing (9) to a preset thrust position of a transmission shaft (7); s2, attaching the measurement mounting seat (1) to a corresponding mounting surface of the reduction gearbox assembly (8), aligning a mounting fixing hole (12) with a preset mounting hole of the reduction gearbox assembly (8), inserting a fixing bolt (2) and screwing, so that the measurement mounting seat (1) and the reduction gearbox assembly (8) are fixed into a whole; S3, inserting the measurement extension probe (6) along the mounting hole of the measuring meter (5) until the measurement extension probe (6) is in stable contact with the thrust surface of the thrust bearing (9); S4, loading the measuring meter (5) into a mounting hole of the measuring meter (5), adjusting the position of the measuring meter (5) to enable the probe of the measuring meter (5) to be fully contacted with one end, far away from the thrust bearing (9), of the measuring extension probe (6), observing the pointer swing of the measuring meter (5), and screwing in a locking bolt (4) to lock and fix the measuring meter (5) after the pointer is stabilized in the middle area of the measuring range; S5, an operator holds the spline end of the transmission shaft (7) by two hands, slowly and stably pulls the transmission shaft (7) along the axial direction, ensures that the transmission shaft (7) moves smoothly without clamping stagnation, synchronously observes the swinging change of the pointer of the measuring meter (5), and records the maximum difference value of the swinging of the pointer, wherein the difference value is the axial clearance value of the transmission shaft (7) when no adjusting gasket is installed; S6, according to the axial clearance value measured in the step S5, selecting an adjusting gasket with corresponding thickness for installation, and repeating the steps S3-S5 until the axial clearance value of the transmission shaft (7) reaches the design requirement.
7. The method for measuring axial clearance of a transmission shaft according to claim 6, wherein the force for pulling the transmission shaft (7) in the step S5 is controlled to be 5-10N, and the axis of the transmission shaft (7) is kept parallel to the axis of the mounting hole of the measuring meter (5) during the pulling process, so that radial deflection of the transmission shaft (7) is avoided.

Description

Transmission shaft axial clearance measuring device and method Technical Field The invention relates to the technical field of detection of a transmission shaft of an underwater propulsion system of a diesel outboard engine, in particular to a device and a method for measuring an axial clearance of the transmission shaft. Background The yacht and the unmanned yacht take an important role in the field of army and civilian by virtue of the advantages of high-speed maneuver, light weight, flexibility, safety, reliability and convenient operation. The diesel outboard engine is used as a core power device of a yacht and an unmanned ship, and the running stability of an underwater propulsion system directly determines the overall performance of the ship. The transmission shaft is a key component for connecting the power output of the crank shaft of the diesel engine with the propulsion of the propeller, and the size of the axial clearance directly influences the continuous transmission of the output power of the crank shaft of the engine and the propulsion stability of the propeller. Too large a gap is easy to cause transmission impact and gear abrasion to be aggravated, and too small a gap can cause problems of component clamping stagnation, heating damage and the like. Therefore, the accurate measurement and control of the axial clearance of the transmission shaft are key links for guaranteeing the reliable operation of the diesel outboard engine and even the whole ship. At present, the traditional transmission shaft axial clearance measuring method mainly relies on a combination device of a dial indicator and a platform sizing block, and the specific operation flow is that the dial indicator is fixed on the platform sizing block through a magnetic meter frame, so that a dial indicator probe is in contact with a corresponding measuring position of the transmission shaft, then the transmission shaft is pulled axially, and the axial clearance value of the transmission shaft is indirectly obtained by observing the swing difference value of a dial indicator. The core components of the measuring device comprise a dial indicator, a magnetometer frame, a sizing block platform, a measuring platform, a transmission shaft to be measured and a reduction gearbox assembly. During measurement, the reduction gearbox assembly is placed on the platform, and the sizing block platform is used as a support carrier of the magnetic meter frame and is in a stacked placement state with the platform. The conventional measuring method has significant defects, and a core problem is that a measuring reference is inconsistent with an installation reference of a measured component. The dial indicator is not directly arranged on the reduction gearbox assembly provided with the transmission shaft, but is fixed on an independent sizing block platform and an independent measuring platform. The transmission shaft of the diesel outboard engine is of an slender shaft structure, the rigidity of the transmission shaft is relatively weak, and a sizing block platform and a measuring platform which are dependent in the measuring process are easily influenced by external environments. Even slight external vibration can be transmitted to the dial indicator through the platform, so that the relative position of the dial indicator probe and the measuring position of the transmission shaft is deviated, and a larger measuring error is generated. In addition, in the traditional measuring method, the installation and positioning of the dial indicator are required to be adjusted repeatedly, the operation flow is complicated, the accuracy of the measuring result is highly dependent on the experience of operators, the measuring results of different operators are easy to have larger discreteness, the consistency and the reliability of the measuring data are difficult to ensure, and the requirement of high-precision measurement of the axial clearance of the transmission shaft of the diesel outboard engine underwater propulsion system cannot be met. Disclosure of Invention The method aims to solve the problems of large measurement error, complex operation, poor data consistency and the like in the traditional measurement method. The invention provides a device and a method for measuring axial clearance of a transmission shaft, which are characterized in that a measuring assembly is directly arranged on a reduction gearbox assembly by utilizing the existing structures such as a gearbox shell, a bearing seat mounting hole, a transmission shaft thrust surface and the like, so that a measuring reference is consistent with a transmission shaft axial clearance adjusting reference, the influence of external vibration on a measuring result is fundamentally reduced, the measuring precision is obviously improved, meanwhile, the structural design of the device is optimized, the operation flow is simplified, the dependence on experience of an operator is reduced, the rapid, acc