CN110319333A - A kind of sliding bearing benefit rouge method for large-scale intermittent motion - Google Patents
A kind of sliding bearing benefit rouge method for large-scale intermittent motion Download PDFInfo
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- CN110319333A CN110319333A CN201810293603.3A CN201810293603A CN110319333A CN 110319333 A CN110319333 A CN 110319333A CN 201810293603 A CN201810293603 A CN 201810293603A CN 110319333 A CN110319333 A CN 110319333A
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- Prior art keywords
- flying shear
- lubricating
- single line
- central control
- control room
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/22—Lubricating-pumps with distributing equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N21/00—Conduits; Junctions; Fittings for lubrication apertures
- F16N21/02—Lubricating nipples
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N27/00—Proportioning devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a kind of sliding bearings for large-scale intermittent motion to mend rouge method, each flying shear haircut is obtained by PLC Central Control Room, cuts tail completion signal, electric lubricating pump station starting is controlled again, get pressure grease, it is filtered by dry oil filter, enter single line distributor by check valve, single line distributor inner piston acts under the promotion of lubricating grease, successively each oil outlet discharge from single line distributor after lubricating grease is divided in portion, it is sent again by pipeline to sliding bearing lubricating point corresponding on flying shear, mends rouge work to be automatically performed.The present invention avoids the one of oil site of original lubricating system when something goes wrong, causes next oil site that can not mend rouge in time, can also reduce and toggle workload, guarantees the normal oils increment of equipment.
Description
Technical field
The present invention relates to grease lubrication devices, more specifically to a kind of sliding bearing for large-scale intermittent motion
Mend rouge method.
Background technique
Flying shear is a kind of common device quickly to cut off iron plate, steel pipe in metallurgical Steel-rolling Industry, current 2050 heat
Rolling flying shear structure type is crank type flying shear, point upper lower slide." breathe out and pay " steel bushing on " breathe out and pay " brasses and crankshaft on knife rest
Sliding bearing structure is constituted, seal form is sealed using mechanical labyrinth formula.Original design mends rouge mode using two-wire, by over the years
The use actual achievement come finds that current mode is the need for not being able to satisfy normal work in conjunction with the existing mechanical lubrication structure of flying shear
It wants.There are following defects:
1. for lower slide using brasses sliding bearing, the oil product used is Lithium-base grease on, because working face is wider,
It is intermittent movement and interval repairing mode again, the mill length and rolling rhythm of each hot-strip are variations, so
It is difficult to realize that lubricant housings forms uniform good lubrication effect；
2. using two-wire lubricating system, there are major defects are as follows:
If 1) oil leak occurs in one of circuit, leakage will affect the normal work of whole system；
2) bad environments, purging line leak time are longer；
3) keypoint part topping up of oil cannot achieve Variable Control.
Summary of the invention
In view of the above defects of the prior art, the object of the present invention is to provide a kind of for large-scale intermittent motion
Sliding bearing mends rouge method, avoids the one of oil site of original lubricating system when something goes wrong, leads to next oil site
Rouge can not be mended in time, can also reduce and toggle workload, guarantee the normal oils increment of equipment；In addition, each is hot
The mill length and rolling rhythm for rolling strip are all variations, and the present invention breaks through existing lubricant housings completely to be formed in time
Uniformly with the industry problems of good lubrication effect.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of sliding bearing benefit rouge method for large-scale intermittent motion, comprising the following steps:
1) PLC Central Control Room obtains flying shear rest position signal according to hot fine rolling basic automation systems；
2) coil of strip reaches roller position of testing the speed；
3) PLC Central Control Room obtains strip steel head forward speed, and flying shear cutting head is in preparation state；
4) PLC Central Control Room is according to strip forward speed, and after calculating reaches the flying shear haircut time, flying shear carries out cutting head work；
5) hot fine rolling basic automation systems transmit the completed signal of flying shear haircut to PLC Central Control Room；
6) PLC Central Control Room control electric lubricating pump station starting, gets pressure grease, filters by dry oil filter, pass through
Check valve enters single line distributor；
7) single line distributor inner piston acts under the promotion of lubricating grease, successively from single line after lubricating grease is divided in portion
Each oil outlet discharge on distributor, then given by pipeline to sliding bearing lubricating point corresponding on flying shear；
8) PLC Central Control Room, which obtains, mends rouge completion information, and flying shear back-end crop is in preparation state；
9) PLC Central Control Room is according to strip forward speed, and after calculating reaches the flying shear tail-shearing time, flying shear carries out back-end crop work；
10) hot fine rolling basic automation systems transmit the completed signal of flying shear tail-shearing to PLC Central Control Room；
11) PLC Central Control Room control electric lubricating pump station starting, gets pressure grease, filters by dry oil filter, pass through
Check valve enters single line distributor；
12) single line distributor inner piston acts under the promotion of lubricating grease, successively from list after lubricating grease is divided in portion
Each oil outlet discharge on line distributor, then given by pipeline to sliding bearing lubricating point corresponding on flying shear；
13) it repeats the above steps 3) to step 12), completes each haircut of flying shear, subtracts the automatic benefit rouge after tail.
The electric lubricating pump station is equipped with two, according to actually required benefit rouge amount, controls two electronic profits by PLC Central Control Room
Sliding pumping plant starts simultaneously, or only starts a wherein electric lubricating pump station.
The single line distributor is eight channel single line distributors, comprising: shell, the oil inlet on shell, and be set to
Four groups of oil outlet components being connected on shell with oil inlet；
The oil outlet component includes: the oil outlet that a pair of opposite direction is arranged and is connected on shell, is set to two
Piston between a oil outlet communicating position, oil inlet are connected with electric lubricating pump station；Pipe is connected on each oil outlet
Road, every root canal road are connected with sliding bearing lubricating point corresponding on the flying shear respectively；
Check valve and press detection sensor are also successively arranged on every root canal road.
Overflow valve is additionally provided on each oil outlet.
In the above technical solution, a kind of sliding bearing for large-scale intermittent motion provided by the present invention mends rouge side
Method, also have the following the utility model has the advantages that
1) non-interference between each lubricating loop through the invention when carrying out benefit rouge, it will not be because of a circuit oil leak
And other circuits are influenced, cause the normal operation work of whole system；
2) there is monitoring is practical to mend rouge amount and oil leak situation on each sliding bearing lubricating point through the invention, it can be in time
Control the operating condition on each oil site；
3) through the invention for trouble shooting confirmation facilitate it is intuitive,
4) can set the period through the invention carries out automatic running, reaches the fining period and mends rouge automatically, realizes good
It is effective to mend grease lubrication effect.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the structural schematic diagram of flying shear Multipoint synchronous lubricating system；
Fig. 3~Figure 10 is the schematic diagram of each oil outlet output of single line distributor in flying shear Multipoint synchronous lubricating system.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and examples.
Incorporated by reference to shown in Fig. 1, a kind of sliding bearing benefit rouge method for large-scale intermittent motion provided by the present invention is wrapped
Include following steps:
1) PLC Central Control Room 2 obtains 1 upper tool post of shear arrangement according to hot fine rolling basic automation systems 13 (referred to as: BA)
Position signal；
2) coil of strip reaches roller position of testing the speed；
3) PLC Central Control Room 2 obtains strip steel head forward speed, and flying shear cutting head is in preparation state；
4) PLC Central Control Room 2 is according to strip forward speed, and after calculating reaches the flying shear haircut time, flying shear carries out cutting head work；
5) finish rolling BA transmits the completed signal of flying shear haircut to PLC Central Control Room 2；
6) PLC Central Control Room 2 controls electric lubricating pump station 3 and starts, and gets pressure grease, filters by dry oil filter 8, leads to
It crosses check valve 9 and enters single line distributor 4；
7) 4 inner piston of single line distributor acts under the promotion of lubricating grease, successively from list after lubricating grease is divided in portion
Each oil outlet discharge on line distributor 4, then given by pipeline 5 to sliding bearing lubricating point 11 corresponding on flying shear；
8) PLC Central Control Room 2, which obtains, mends rouge completion information, and flying shear back-end crop is in preparation state；
9) PLC Central Control Room 2 is according to strip forward speed, and after calculating reaches the flying shear tail-shearing time, flying shear carries out back-end crop work；
10) finish rolling BA transmits the completed signal of flying shear tail-shearing to PLC Central Control Room 2；
11) PLC Central Control Room 2 controls electric lubricating pump station 3 and starts, and gets pressure grease, filters by dry oil filter 8,
Enter single line distributor 4 by check valve 9；
12) 4 inner piston of single line distributor acts under the promotion of lubricating grease, successively from list after lubricating grease is divided in portion
Each oil outlet discharge on line distributor 4, then given by pipeline to sliding bearing lubricating point 11 corresponding on flying shear；
13) it repeats the above steps 3) to step 12), completes each haircut of flying shear, subtracts the automatic benefit rouge after tail.
Hot rolling flying crank shears Multipoint synchronous lubricating system used in the present invention, comprising: shear arrangement 1, further includes: use
With the PLC Central Control Room 2 of turn-key system, and electric lubricating pump station 3 and single line distributor 4 to get pressure grease.
Preferably, the electric lubricating pump station 3 is equipped with two, according to actually required benefit rouge amount, controlled by PLC Central Control Room 2
Two electric lubricating pump stations 3 start simultaneously, or only start a wherein electric lubricating pump station 3.
Preferably, the single line distributor 4 is the single line distributor 4 in eight channels, pressure 32Mpa, comprising: shell, if
In the oil inlet 40 on shell, and four groups of oil outlet components being connected on shell with oil inlet 40；Described every group fuel-displaced
Mouth component includes: the oil outlet 41,42,43,44,45,46,47,48 that a pair of opposite direction is arranged and is connected on shell,
Piston 50a, 50b, 50c, 50d between two oil outlet communicating positions, oil inlet 40 are connected with electric lubricating pump station 3.
Preferably, being connected with pipe made of a copper pipe on each oil outlet 41,42,43,44,45,46,47,48
Road 5, every root canal road 5 are connected with oil site 11 corresponding on the shear arrangement 1 respectively, are carried out automatically to the oil site 11
Mend rouge.
Preferably, being also successively arranged check valve 6 and press detection sensor 7 on every root canal road 5.
Preferably, being also successively arranged dry oil filter 8 and list between the electric lubricating pump station 3 and single line distributor 4
To valve 9.
Preferably, each 11 front end of sliding bearing lubricating point is additionally provided with overflow valve 10.
The present invention mends rouge number (root in use, closely controlling first on PLC Central Control Room 2 and setting eight tunnels in operation " OP " picture
According to topping up of oil), that electric lubricating pump station 3 of reselection work, activation system start button, system is set according to PLC Central Control Room 2
Period carries out automatic running.
In the work of selected electric lubricating pump station 3, pressure grease is got, is filtered by dry oil filter 8, passes through list
Enter the single line distributor 4 in eight channels to valve 9.It carries out single line automatically in order and mends rouge, entered respectively by pipeline 5 corresponding sliding
A press detection sensor 7 has been respectively configured in dynamic bearing oil site 11 (eight points) on each channel of pipeline 5, and
Alarm pressure value (according to practical logical pressure of grease value) can be set, 5 Oil Leakage Detecting function of pipeline may be implemented and repairing counts
Function.The number of work is to carry out benefit rouge according to the number of nearly control operation screen setting, has arrived electric lubricating pump station 3 after setting number
Stop rest wait state.
The 1 rest position point of shear arrangement that PLC Central Control Room 2 is provided according to finish rolling BA, carry out fining the period mend automatically
Rouge realizes good effective benefit grease lubrication effect.
The present invention can be divided into automatic mode and manual mode, no matter under automatic or manual mode, after starting this system,
Whether the oil level that system detects in 3 oil drum of electric lubricating pump station first is in low level (is equipped on 3 oil drum of electric lubricating pump station
High low oil level signal transmitter), (the low signal of oil level is not eliminated, and electric lubricating pump station 3 will be locked, no when as low such as oil drum oil level
Can start), PLC Central Control Room 2 can issue " liquid level is low " fault alarm signal.At this moment lubrication bucket is replaced, during which electronic lubrication
The locking of pumping plant 3 cannot start, and lubricating pump is automatically into normal work after the completion.
Automatic mode: when this system oil supply period to after, electric lubricating pump station 3 is started to work, and electric lubricating pump station 3 is from storage
Pressurized rear be discharged of lubricating grease is sucked out in oily cylinder and passes through supervisor's 4 feed lubricating grease of road direction single line distributor, it is living in single line distributor 4
Plug acts under the promotion of lubricating grease, successively send from the discharge of each oil outlet by pipeline 5 to cunning after lubricating grease is divided in portion
Dynamic bearing oil site 11, PLC Central Control Room 2 counts the dynamic number of single line distributor 4, and (cycle-index of single line distributor 4 can
Adjust), when 4 action frequency of single line distributor reaches preset value, electronic lubricating pump 3 stops working, by the time of setting
Restarting is pumped behind interval, repeats above-mentioned work, so in cycles, realizes the full-automatic profit to sliding bearing lubricating point 11
It is sliding.
The operation logic of grease is discharged in each oil outlet 41,42,43,44,45,46,47,48 on single line distributor 4 of the present invention:
As shown in Fig. 2, lubricating grease, which is entered in single line distributor 4 with arrow direction from oil inlet 40, is sent to piston 50a's
Right end, piston 50a are moved to the left by grease pressure, and the lubricating grease of front end passes through shell on the left of piston 50a
Body inner passage is delivered to oil outlet 42 and reaches corresponding sliding bearing lubricating point 11 thence through lubricating place pipeline 5.
As shown in figure 3, leading to the connection of piston 50b right side termination position after piston 50a reaches its left side terminal location
Channel is opened, and the end that lubricating grease is flow on the right side of piston 50b simultaneously moves piston 50b to the left, before being located on the left of piston 50b
The lubricating grease at end is transported to oil outlet 47 by enclosure interior channel.
As shown in figure 4, it to lead to piston 50c right side termination position after piston 50b is located at its left side terminal location
Interface channel get through, such lubricating grease flows under the effect of the pressure and moves downward piston 50c, and be located at piston 50c
The lubricating grease of left side front end is transported to oil outlet 45.
As shown in figure 5, the interface channel for leading to piston 50d now is open, lubricating grease is sent to end on the right side of piston 50d
End, the lubricating grease of front end will be exported from oil outlet 43 on the left of piston 50d.
As indicated with 6, after piston 50d, which is got through, leads to the interface channel of terminal on the left of piston 50a, lubricating grease is flowed and will be lived
Plug 50a is pushed to the right, and the lubricating grease on right side is transported to oil outlet 41 before piston 50a.
Piston 50b to piston 50d is moved to the right from left side at this time, completes a week by above-mentioned opposite direction sequentially-operating
Phase recycles and can restart a new circulation:
As shown in fig. 7, moving right for piston 50b, oil outlet 48 is fuel-displaced.
As shown in figure 8, moving right for piston 50c, oil outlet 46 is fuel-displaced.
As shown in figure 9, moving right for piston 50d, oil outlet 44 is fuel-displaced.
Equipped with check valve 6 (totally 8 on each point of each oil outlet 41,42,43,44,45,46,47,48 of single line distributor 4
It is a), a pressure sensor 7 (totally 8) are filled again behind each check valve 6, and the front end of each sliding bearing lubricating point 11 fills one
A overflow valve 10 is just always maintained at a pressure, when pressure control sensor 7 in this way between check valve 6 and overflow valve 12
When detecting the pressure in this section of pipeline lower than the value set, illustrate that this section of pipeline has leakage；When pressure control sensor 7 detects
When being higher than the value of setting to pressure, illustrate that the subsequent pipeline of check valve 6 or oil site 11 block.
It is also equipped with overflow valve 12 in the oil outlet 41,42,43,44,45,46,47,48 of single line distributor 4, when 8 cunnings
When each of dynamic bearing oil site 11 or multiple sliding bearing lubricatings point 11 (or pipeline) block, under high pressure effect, block up
Overflow valve 12 on the sliding bearing lubricating point 11 of plug on corresponding single line distributor 4 at corresponding oil outlet is opened, grease overflow,
7 alarm for high voltage of pressure control sensor on sliding bearing lubricating point 11 for ensuring that system can work normally, while blocking, needs
Operator checks and debugs.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (6)
1. a kind of sliding bearing for large-scale intermittent motion mends rouge method, which comprises the following steps:
1) PLC Central Control Room obtains flying shear rest position signal according to hot fine rolling basic automation systems；
2) coil of strip reaches roller position of testing the speed；
3) PLC Central Control Room obtains strip steel head forward speed, and flying shear cutting head is in preparation state；
4) PLC Central Control Room is according to strip forward speed, and after calculating reaches the flying shear haircut time, flying shear carries out cutting head work；
5) hot fine rolling basic automation systems transmit the completed signal of flying shear haircut to PLC Central Control Room；
6) PLC Central Control Room control electric lubricating pump station starting, gets pressure grease, filters by dry oil filter, by unidirectional
Valve enters single line distributor；
7) single line distributor inner piston acts under the promotion of lubricating grease, successively distributes from single line after lubricating grease is divided in portion
Each oil outlet discharge on device, then given by pipeline to sliding bearing lubricating point corresponding on flying shear；
8) PLC Central Control Room, which obtains, mends rouge completion information, and flying shear back-end crop is in preparation state；
9) PLC Central Control Room is according to strip forward speed, and after calculating reaches the flying shear tail-shearing time, flying shear carries out back-end crop work；
10) hot fine rolling basic automation systems transmit the completed signal of flying shear tail-shearing to PLC Central Control Room；
11) PLC Central Control Room control electric lubricating pump station starting, gets pressure grease, filters by dry oil filter, by unidirectional
Valve enters single line distributor；
12) single line distributor inner piston acts under the promotion of lubricating grease, successively from single line point after lubricating grease is divided in portion
Each oil outlet discharge on orchestration, then given by pipeline to sliding bearing lubricating point corresponding on flying shear；
13) it repeats the above steps 3) to step 12), completes each haircut of flying shear, subtracts the automatic benefit rouge after tail.
2. a kind of sliding bearing for large-scale intermittent motion as described in claim 1 mends rouge method, it is characterised in that: described
Electric lubricating pump station is equipped with two, according to actually required benefit rouge amount, controls two electric lubricating pump stations by PLC Central Control Room and opens simultaneously
It is dynamic, or only start a wherein electric lubricating pump station.
3. a kind of sliding bearing for large-scale intermittent motion as described in claim 1 mends rouge method, it is characterised in that: described
Single line distributor is eight channel single line distributors, comprising: shell, the oil inlet on shell, and be set on shell and oil inlet
Four groups of oil outlet components that mouth is connected.
4. a kind of sliding bearing for large-scale intermittent motion as claimed in claim 3 mends rouge method, it is characterised in that: described
Oil outlet component includes: the oil outlet that a pair of opposite direction is arranged and is connected on shell, is set to two oil outlet connections
Piston between position, oil inlet are connected with electric lubricating pump station；Pipeline, every root canal are connected on each oil outlet
Road is connected with sliding bearing lubricating point corresponding on the flying shear respectively.
5. a kind of sliding bearing for large-scale intermittent motion as claimed in claim 4 mends rouge method, it is characterised in that: described
Check valve and press detection sensor are also successively arranged on every root canal road.
6. a kind of hot rolling flying crank shears Multipoint synchronous lubricating system as claimed in claim 4, it is characterised in that: described is every
Overflow valve is additionally provided on a oil outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810293603.3A CN110319333B (en) | 2018-03-30 | 2018-03-30 | Sliding bearing grease supplementing method for large-scale clearance motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810293603.3A CN110319333B (en) | 2018-03-30 | 2018-03-30 | Sliding bearing grease supplementing method for large-scale clearance motion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110319333A true CN110319333A (en) | 2019-10-11 |
| CN110319333B CN110319333B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810293603.3A Active CN110319333B (en) | 2018-03-30 | 2018-03-30 | Sliding bearing grease supplementing method for large-scale clearance motion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810825A (en) * | 2020-07-21 | 2020-10-23 | 中铁工程装备集团有限公司 | Lubricating and sealing system of heading machine |
| CN115199929A (en) * | 2022-07-06 | 2022-10-18 | 重庆安特瑞润滑设备有限公司 | Double-plunger grease distribution valve |
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| Title |
|---|
| 李鹏来等: "热轧生产线飞剪干油润滑系统改造", 《润滑与密封》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810825A (en) * | 2020-07-21 | 2020-10-23 | 中铁工程装备集团有限公司 | Lubricating and sealing system of heading machine |
| CN115199929A (en) * | 2022-07-06 | 2022-10-18 | 重庆安特瑞润滑设备有限公司 | Double-plunger grease distribution valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110319333B (en) | 2021-11-16 |
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