CN105444964A - Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side - Google Patents

Method and device for detecting leakproofness of lubricating oil pocket of transmission shaft gear case side Download PDF

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Publication number
CN105444964A
CN105444964A CN201410404093.4A CN201410404093A CN105444964A CN 105444964 A CN105444964 A CN 105444964A CN 201410404093 A CN201410404093 A CN 201410404093A CN 105444964 A CN105444964 A CN 105444964A
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China
Prior art keywords
gear case
leakproofness
flange
lubrication pockets
stop valve
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CN201410404093.4A
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CN105444964B (en
Inventor
杨建林
刘永丰
朱大刚
毛兴
傅佳杰
曾建峰
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Publication of CN105444964A publication Critical patent/CN105444964A/en
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Publication of CN105444964B publication Critical patent/CN105444964B/en
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Abstract

The invention provides a method for detecting leakproofness of a lubricating oil pocket of a transmission shaft gear case side. The method includes the following steps: before a transmission shaft is mounted, leakproofness detection is performed on an installation position of a first flange of one end of the lubricating oil pocket which is away from the gear case; and after the transmission shaft is mounted, leakproofness detection is performed on an installation position of a second flange of one end of the lubricating oil pocket which is close to the gear case. The method provided by the invention can ensure that leakproofness of the installation positions of the flanges of two ends of the lubricating oil pocket of one side of the gear case to be good, thereby guaranteeing no leakage of lubricating oil when equipment runs, guaranteeing safety production, and avoiding equipment abnormity and fault shutdown.

Description

The leakproofness detection method of the lubrication pockets of shaft gear case side and device
Technical field
The present invention relates to the detection field of cold rolling machinery, particularly a kind of leakproofness detection method of lubrication pockets of shaft gear case side and device.
Background technology
As shown in Figure 1, the transmission shaft 1 that the frame of cold-rolling mill uses is generally barreled tooth flank 10 form.Due to the stroke of transmission shaft 1 and the singularity of pendulum angle of drum-shaped tooth type, lubrication pockets 11,11 ' is usually used to hold lubricating oil at drum type tooth 10 place.The lubrication pockets being positioned at the close gear case (not shown) side of transmission shaft 1 is 11 shown in Fig. 1, and the lubrication pockets be positioned near roll side is 11 ' shown in Fig. 1.
Because lubrication pockets 11,11 ' is rubber, easy loss, its serviceable life only has some months usually.During to the replacement cycle, need, by transmission shaft 1 time machine, to change the lubrication pockets 11,11 ' of its both sides.
After lubrication pockets is changed, the flange at the two ends of the lubrication pockets 11 ' of roll side installs, therefore, it is possible to ensure its sealing of installing when repairing.But the installation more complicated of the lubrication pockets 11 of gear box side, as shown in Figure 2, need when lubrication pockets 11 is repaired, first flange 111 of its one end away from gear case 2 to be arranged on transmission shaft 1, but second flange 112 of its one end near gear case 2 is just installed to during machine on the output sleeve 20 of gear case 2 on transmission shaft 1.
Due to gear box side lubrication pockets 11 singularity when mounted; the flange at the two ends of easy generation lubrication pockets installs situation not in place; cause installation position that leakage of oil occurs; when transmission shaft 1 works, the lubricating oil of lubrication pockets inside can get rid of at short notice; barreled tooth flank 10 is directly caused to work under unlubricated state; finally can damage barreled tooth flank 10 at short notice, thus cause equipment failure to shut down, bring greater impact to activity in production.
Summary of the invention
For this reason, the invention provides a kind of leakproofness detection method of lubrication pockets of shaft gear case side, comprise the steps: S1. on described transmission shaft before machine, leakproofness detection is carried out to the installation position of first flange of one end away from described gear case of described lubrication pockets; S2. on described transmission shaft, after machine, leakproofness detection is carried out to the installation position of second flange of one end of the close described gear case of described lubrication pockets.
Preferably, the pressure gas with predetermined pressure is used to carry out described leakproofness detection.
Preferably, described predetermined pressure is more than or equal to the pressure of the lubricating oil from its inside that described transmission shaft described lubrication pockets when maximum (top) speed is born.
Preferably, described predetermined pressure 1.3 times of the pressure of the lubricating oil from its inside of bearing for described transmission shaft described lubrication pockets when maximum (top) speed.
Preferably, described predetermined pressure is 0.38kgf/cm 2.
Present invention also offers a kind of tightness detector of lubrication pockets of shaft gear case side, it is characterized in that, comprising: that the barreled tooth flank of described transmission shaft can be held, that one end is provided with air admission hole, the other end is provided with three-flange seal casing; Steam hose and the first stop valve, reduction valve, the first tensimeter, the second stop valve and the second tensimeter that are connected in turn between the inlet end of described steam hose and outlet side.
Preferably, described reduction valve has manual exhaust portion, and the range of described reduction valve is 0.02 ~ 0.87MPa.
Present invention also offers a kind of method that lubrication pockets to shaft gear case side carries out leakproofness detection, it is characterized in that, comprise the following steps of the installation position of described first flange being carried out to leakproofness detection: described three-flange is connected with described second flange is airtight by S81., the inlet end of described steam hose is connected to compressed-air production apparatus, and its outlet side is airtight is connected to described air admission hole; S82. described reduction valve is set to minimum range, opens described first stop valve, close described second stop valve, pass into pressurized air at the inlet end of described steam hose; S83. described reduction valve is set to predetermined pressure, observes the first tensimeter, until pressure stability performs S84; S84. open the second stop valve, observe the second tensimeter, until pressure stability closes the first stop valve and the second stop valve; S85. keep the schedule time, whether the force value of observing the second tensimeter display declines, and then judges that the leakproofness of the installation position of described first flange is bad if any decline, as intact without the then leakproofness of the installation position of the first flange as described in judgement that declines.
Further, also comprise the following steps of the installation position of described second flange being carried out to leakproofness detection: described transmission shaft is installed on the output sleeve of described gear case by S91., the inlet end of described steam hose is connected to compressed-air production apparatus, the airtight lubrication hole being connected to described output sleeve in its outlet side; S92. described reduction valve is set to minimum range, opens described first stop valve, close described second stop valve, pass into pressurized air at the inlet end of described steam hose; S93. described reduction valve is set to predetermined pressure, observes the first tensimeter, until pressure stability performs S94; S94. open the second stop valve, observe the second tensimeter, until pressure stability closes the first stop valve and the second stop valve; S95. keep the schedule time, whether the force value of observing the second tensimeter display declines, and then judges that the leakproofness of the installation position of described second flange is bad if any decline, as intact without the then leakproofness of the installation position of the second flange as described in judgement that declines.
Preferably, the described schedule time is 30 minutes.
The present invention is by carrying out leakproofness detection to the installation position of first flange of one end away from gear case of lubrication pockets before machine on transmission shaft; and after machine, leakproofness detection is carried out to the installation position of second flange of one end of the close gear case of lubrication pockets on transmission shaft; can guarantee that the leakproofness of the installation position of the flange at the two ends of the lubrication pockets of gear case side is intact; thus ensure the lubricating oil No leakage when equipment operation; ensure that safety in production, avoid unit exception and disorderly closedown.
Accompanying drawing explanation
Fig. 1 is the structural representation of transmission shaft and lubrication pockets thereof;
Fig. 2 is the mounting structure schematic diagram of transmission shaft and gear case;
Fig. 3 is the schematic flow sheet of the leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention;
Fig. 4 is the schematic diagram of the Part I structure of the tightness detector of the lubrication pockets of shaft gear case side of the present invention;
Fig. 5 is the scheme of installation of the Part II structure of the tightness detector of the lubrication pockets of shaft gear case side of the present invention;
Fig. 6 is the device connection diagram that leakproofness detection is carried out in the installation position to the first flange of the leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention;
Fig. 7 is the device connection diagram that leakproofness detection is carried out in the installation position to the second flange of the leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention.
Description of reference numerals:
1: transmission shaft 10: barreled tooth flank
11: near the lubrication pockets of gear case side
11 ': near the lubrication pockets of roll side
111: the first flange 112: the second flanges
2: gear case 20: output sleeve 201: lubrication hole
30: the Part I 300 of tightness detector: steam hose
3001: inlet end 3002: outlet side
301: the first stop valves 302: reduction valve
303: the first tensimeter 304: the second stop valves
305: the second tensimeters
31: the Part II 310 of tightness detector: seal casing
311: air admission hole 312: the three-flange
32: jointing
Embodiment
Below in conjunction with the drawings and specific embodiments, the leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention and device are described in further detail, but not as a limitation of the invention.
With reference to Fig. 3, it is the schematic flow sheet of the leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention.The leakproofness detection method of the lubrication pockets of shaft gear case side of the present invention, comprises the steps: S1. on transmission shaft before machine, carries out leakproofness detection to the installation position of first flange of one end away from gear case of lubrication pockets; S2. on transmission shaft, after machine, leakproofness detection is carried out to the installation position of second flange of one end of the close gear case of lubrication pockets.
Carry out the method and apparatus of leakproofness detection, can adopt the method and apparatus that various leakproofness of the prior art detects, such as, publication number is the method and apparatus that leakproofness disclosed in the patent documentation of CN103471785A or CN101059388A detects.
Preferably, leakproofness detection method of the present invention uses the pressure gas with predetermined pressure to carry out leakproofness detection.In order to ensure the reliability that leakproofness detects, need to use the pressure gas with certain pressure; Meanwhile, consider that using the compressed gas of hypertonia to know from experience causes lubrication pockets to be damaged, the pressure of the pressure gas used can not be excessive.Therefore, the pressure determining the suitable pressure gas carrying out leakproofness detection is needed, i.e. above-mentioned predetermined pressure.
Usually, this predetermined pressure should be more than or equal to the pressure of the lubricating oil from its inside that transmission shaft lubrication pockets when maximum (top) speed is born.Preferably, predetermined pressure 1.3 times of the pressure of the lubricating oil from its inside of bearing for transmission shaft lubrication pockets when maximum (top) speed.
When transmission shaft at maximum (top) speed time the lubrication pockets pressure of the lubricating oil from its inside that bears cannot be obtained by the technical parameter of lubrication pockets or cannot measure obtain, this maximum pressure can be obtained by calculating, thus calculate above-mentioned predetermined pressure.
Such as, the pressure P of the lubricating oil from its inside that transmission shaft lubrication pockets when maximum (top) speed is born, can be obtained by the ratio of the internal surface area A calculating centrifugal force F that transmission shaft produces lubricating oil when maximum (top) speed and lubrication pockets, that is:
P=F/A=mv 2r 1/ 2 π R 2l 2, wherein, m is the quality of the lubricating oil in lubrication pockets, and v is the linear velocity of transmission shaft when maximum (top) speed, R 1for the radius of the close gear case side of transmission shaft, R 2for the radius of lubrication pockets, L 2for the length of lubrication pockets.
Wherein, the quality m of the lubricating oil in lubrication pockets calculates by following formula:
M=ρ V, wherein, ρ is the density of lubricating oil, and V is the volume of lubricating oil.Usually, the density p of lubricating oil is 0.9 kilogram/cubic decimeter, and the volume V of the lubricating oil in lubrication pockets is 5.8 cubic decimeters, and the quality m of the lubricating oil in its lubrication pockets is 7.65 kilograms.
The linear velocity v of transmission shaft when maximum (top) speed calculates by following formula:
V=nL 1, wherein, n is the rotating speed of transmission shaft when maximum (top) speed, and usual value is 526.316 revs/min, L 1for the girth of the close gear case side of transmission shaft, with 2 π R 1calculate, at R 1when value is 0.22 meter, L 1it is 1.38 meters.Can calculate thus, the linear velocity v of transmission shaft when maximum (top) speed is 7.7 ms/min, i.e. 12.12 meter per seconds.
Based on above data and formula, and the radius R of lubrication pockets 2be 0.1845 meter, the length L of lubrication pockets 2be 0.15 meter, can calculate, the pressure P of the lubricating oil from its inside that transmission shaft lubrication pockets when maximum (top) speed is born is 0.29kgf/cm 2.
Consider the reliability that leakproofness detects, compressed air pressure during actual detection improves 30% than this theoretical detected pressures value, and namely predetermined pressure preferred value is 1.3 times of this force value, is 0.38kgf/cm 2.
With reference to Fig. 4 and Fig. 5, be the schematic diagram of the Part I 30 of tightness detector for the lubrication pockets of shaft gear case side of the present invention and the structure of Part II 31 respectively.
The Part I 30 of the tightness detector of the lubrication pockets of shaft gear case side of the present invention comprises steam hose 300, and is connected to the first stop valve 301, reduction valve 302, first tensimeter 303, second stop valve 304 and the second tensimeter 305 between the inlet end 3001 of steam hose 300 and outlet side 3002 in turn.The Part II 31 of the tightness detector of the lubrication pockets of shaft gear case side of the present invention comprises that can hold the barreled tooth flank 10 of transmission shaft 1, that one end is provided with air admission hole 311, the other end is provided with three-flange 312 seal casing 310.
Preferably, the bottom of this reduction valve 302 has manual exhaust portion (such as, manual exhaust button), the manual overbottom pressure to reduction valve 302 inside can be exhausted operation at any time.According to the above-mentioned calculating to predetermined pressure, the range of reduction valve is preferably 0.02 ~ 0.87MPa.
Present invention also offers the leakproofness detection method of the lubrication pockets of the shaft gear case side based on said apparatus.Before this device of use carries out leakproofness detection, first leakproofness detection is carried out to this device, namely pass into pressurized air at the inlet end 3001 of steam hose 300, outlet side 3002 is blocked simultaneously, keep pressure in 30 minutes observation tensimeters whether to have decline, thus judge that whether this device is airtight.After this device of confirmation is airtight, can start to detect the leakproofness of the lubrication pockets of shaft gear case side.
On transmission shaft 1 before machine, leakproofness detection is carried out to the installation position of first flange 111 of one end away from gear case 2 of lubrication pockets 11.Step S81, as shown in Figure 6, three-flange 312 on seal casing 310 is carried out airtight connection with the second flange 112 by fastening bolt etc., the inlet end 3001 of steam hose 300 is connected to compressed-air production apparatus (such as compressed air station, air compressor etc.), and its outlet side 3002 is connected to air admission hole 311 by jointing 32 etc. is airtight.
Step S82, is set to minimum range by reduction valve 302, opens the first stop valve 301, closes the second stop valve 304, passes into pressurized air at the inlet end 3001 of steam hose 300.Step S83, is set to predetermined pressure by reduction valve 302, observes the first tensimeter 303, until pressure stability performs S84.Step S84, opens the second stop valve 304, observes the second tensimeter 305, until pressure stability closes the first stop valve 301 and the second stop valve 304.Step S85, keep the schedule time (being preferably 30 minutes), whether the force value of observing the second tensimeter 305 display declines, and then judges that the leakproofness of the installation position of the first flange 111 is bad if any decline, as then judged that the leakproofness of the installation position of the first flange 111 is intact without declining.
On transmission shaft 1 after machine, leakproofness detection is carried out to the installation position of second flange 112 of one end of the close gear case 2 of lubrication pockets 11.Step S91, as shown in Figure 7, transmission shaft 1 is installed on the output sleeve 20 of gear case 2, the inlet end 3001 of steam hose 300 is connected to compressed-air production apparatus (such as compressed air station, air compressor etc.), the airtight lubrication hole 201 being connected to output sleeve 20 in its outlet side 3002.
Step S92, is set to minimum range by reduction valve 302, opens the first stop valve 301, closes the second stop valve 304, passes into pressurized air at the inlet end 3001 of steam hose 300.Step S93, is set to predetermined pressure by reduction valve 302, observes the first tensimeter 303, until pressure stability performs S94.Step S94, opens the second stop valve 304, observes the second tensimeter 305, until pressure stability closes the first stop valve 301 and the second stop valve 304.Step S95, keep the schedule time (being preferably 30 minutes), whether the force value of observing the second tensimeter 305 display declines, and then judges that the leakproofness of the installation position of the second flange 112 is bad if any decline, as then judged that the leakproofness of the installation position of the second flange 112 is intact without declining.
After leakproofness has detected, by the lubrication hole 201 of output sleeve 20, lubricating oil can be injected lubrication pockets 11, after on lubrication hole 201, install plug.Afterwards, namely transmission shaft 1 can carry out normal production operation.
The invention provides complete, reliable, the safe detection scheme of the leakproofness of the installation position of the flange at the two ends to the lubrication pockets of protecting gear case side; can its leakproofness intact; thus ensure the lubricating oil No leakage when equipment operation; ensure that safety in production, avoid unit exception and disorderly closedown.
Above embodiment is only illustrative embodiments of the present invention, can not be used for limiting the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, these are revised or be equal to replacement and also should be considered as dropping in protection scope of the present invention.

Claims (10)

1. a leakproofness detection method for the lubrication pockets of shaft gear case side, comprises the steps:
S1. on described transmission shaft, before machine, leakproofness detection is carried out to the installation position of first flange of one end away from described gear case of described lubrication pockets;
S2. on described transmission shaft, after machine, leakproofness detection is carried out to the installation position of second flange of one end of the close described gear case of described lubrication pockets.
2. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 1, is characterized in that, uses the pressure gas with predetermined pressure to carry out described leakproofness detection.
3. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 2, it is characterized in that, described predetermined pressure is more than or equal to the pressure of the lubricating oil from its inside that described transmission shaft described lubrication pockets when maximum (top) speed is born.
4. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 2, it is characterized in that, 1.3 times of the pressure of the lubricating oil from its inside that described predetermined pressure is born for described transmission shaft described lubrication pockets when maximum (top) speed.
5. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 2, is characterized in that, described predetermined pressure is 0.38kgf/cm 2.
6., for a tightness detector for the lubrication pockets of the shaft gear case side of leakproofness detection method according to claim 2, it is characterized in that, comprising:
That can hold the barreled tooth flank of described transmission shaft, that one end is provided with air admission hole, the other end is provided with three-flange seal casing;
Steam hose and the first stop valve, reduction valve, the first tensimeter, the second stop valve and the second tensimeter that are connected in turn between the inlet end of described steam hose and outlet side.
7. the tightness detector of the lubrication pockets of shaft gear case side according to claim 6, it is characterized in that, described reduction valve has manual exhaust portion, and the range of described reduction valve is 0.02 ~ 0.87MPa.
8. based on a leakproofness detection method for the lubrication pockets of the shaft gear case side of tightness detector according to claim 6, it is characterized in that, comprise the following steps of the installation position of described first flange being carried out to leakproofness detection:
S81. be connected with described second flange is airtight by described three-flange, the inlet end of described steam hose is connected to compressed-air production apparatus, its outlet side is airtight is connected to described air admission hole;
S82. described reduction valve is set to minimum range, opens described first stop valve, close described second stop valve, pass into pressurized air at the inlet end of described steam hose;
S83. described reduction valve is set to predetermined pressure, observes the first tensimeter, until pressure stability performs S84;
S84. open the second stop valve, observe the second tensimeter, until pressure stability closes the first stop valve and the second stop valve;
S85. keep the schedule time, whether the force value of observing the second tensimeter display declines, and then judges that the leakproofness of the installation position of described first flange is bad if any decline, as intact without the then leakproofness of the installation position of the first flange as described in judgement that declines.
9. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 8, is characterized in that, also comprises the following steps of the installation position of described second flange being carried out to leakproofness detection:
S91. described transmission shaft is installed on the output sleeve of described gear case, the inlet end of described steam hose is connected to compressed-air production apparatus, the airtight lubrication hole being connected to described output sleeve in its outlet side;
S92. described reduction valve is set to minimum range, opens described first stop valve, close described second stop valve, pass into pressurized air at the inlet end of described steam hose;
S93. described reduction valve is set to predetermined pressure, observes the first tensimeter, until pressure stability performs S94;
S94. open the second stop valve, observe the second tensimeter, until pressure stability closes the first stop valve and the second stop valve;
S95. keep the schedule time, whether the force value of observing the second tensimeter display declines, and then judges that the leakproofness of the installation position of described second flange is bad if any decline, as intact without the then leakproofness of the installation position of the second flange as described in judgement that declines.
10. the leakproofness detection method of the lubrication pockets of shaft gear case side according to claim 8 or claim 9, it is characterized in that, the described schedule time is 30 minutes.
CN201410404093.4A 2014-08-15 2014-08-15 The airtightness detection method and device of the lubricating oil packet of shaft gear case side Active CN105444964B (en)

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