CN205592223U - Adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder - Google Patents
Adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder Download PDFInfo
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- CN205592223U CN205592223U CN201620343098.5U CN201620343098U CN205592223U CN 205592223 U CN205592223 U CN 205592223U CN 201620343098 U CN201620343098 U CN 201620343098U CN 205592223 U CN205592223 U CN 205592223U
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- hydraulic cylinder
- piston rod
- sealing device
- hydraulic
- cylinder piston
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Abstract
The utility model belongs to the technical field of thermal power equipment, the utility model discloses a solve because of sealing up the effect not goodly, the dust easily gets into the medium speed pulverizer pneumatic cylinder, leads to the fact the problem of hydraulic system trouble, and then provides an adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder, including hydraulic cylinder body and hydraulic cylinder piston rod, hydraulic cylinder body and hydraulic cylinder piston rod's junction is equipped with external sealing device, includes slip cap and the fixed cover of suit on hydraulic cylinder piston rod that fixing the lower extreme of cover and being connected with hydraulic cylinder body, hydraulic cylinder piston rod and fixed sheatheeing in are fixed in through the locking ring respectively in the both ends of slip cap. The utility model discloses a to go up the one set of external ram that increases on original sealed basis sealed, has solved thoroughly that the hydraulic oil system gets into that the oil that buggy, dust caused worsens, pneumatic cylinder piston and seal damage, frequent regulation trouble, the big scheduling problem of operating repair work load.
Description
Technical field
This utility model belongs to steam power plant technical field, is specifically related to a kind of ZGM113 medium-speed pulverizer hydraulic cylinder using new type sealing device.
Background technology
Shanxi Zhangshan Power Generation Co., Ltd. of Jing Neng group 2 × 600MW unit unit pulverized-coal system uses the ZGM113N type medium-speed pulverizer that Beijing Electrical Equipment Factory is supporting, this kind of coal pulverizer uses hydraulic loaded mode, changes exerting oneself of coal pulverizer by adjusting loading force.Every supporting 6 coal pulverizers of stove, 6 set hydraulic loading systems, often set loading system loads petrol station and three load cylinders containing one.Its hydraulic system is to adjust the core component of pulverizer capacity.
Operation principle: ZGM113N coal pulverizer is a kind of intermediate speed roller disc type grinding coal pulverizer, its part of milling and can the grinding roller of rotation be made up of along roll fixing of bull ring the bull ring rotated and three.The raw coal that need to grind is fallen bull ring from the central coal spout of coal pulverizer, rotates bull ring and moves to mill on raceway by raw coal by means of centrifugal force, is milled by grinding roller.Three grinding rollers are along the circumferential direction distributed on mill raceway, grinding forces is then produced by hydraulic loading system, by three dot systems of static determinacy, grinding forces stepless action is on three grinding rollers, this power reaches basis by base plate after bull ring, grinding roller, pressure rack, pull bar, drive plate, reductor, hydraulic cylinder, sees Fig. 2.
Coal pulverizer not only can have been implemented by load cylinder and load but also can realize coal pulverizer and lift when maintenance or fall grinding roller by supporting hydraulic oil pumping plant.Pull bar charger is made up of upper connecting rod, lower link, spherical self-aligning bearing, surveyors' staff, pull bar connecting sleeve, bearing pin etc..Upper connecting rod top is connected in pressure rack by spherical self-aligning bearing, draws by casing through tie-rod sealing, and upper connecting rod bottom is connected with lower link top by connecting sleeve, and lower link bottom utilizes connecting sleeve to be integrally connected with load cylinder piston rod.
Hydraulic loading system is as the core component of coal pulverizer, and it provides the high pressure loading force up to 20MPa, and oil cleannes require high, supporting oil filter pressure rating 25MPa, filtering accuracy 3 μm.When hydraulic oil system oil cleanliness reaches NAS1638 standard eight grades, hydraulic oil system can put into operation.Often set hydraulic system has 3 load cylinders, cylinder diameter Φ 160mm, diameter of piston rod Φ 100mm, oil cylinder stroke 300mm, maximum working (operation) pressure (MWP) 20MPa, uniform by 120 degree, oil cylinder top is connected with pull bar, bottom equipped with oscillating bearing, with the bearing pin of pull bar charger through oscillating bearing by oil cylinder with on the basis of pull bar platen be connected.
FAQs: due to the work under bad environment of medium-speed pulverizer, big often in vibration, the adverse circumstances that dust concentration is high, the dust in air easily enters hydraulic system by the gap of hydraulic cylinder piston rod with cylinder body, causes the fault of hydraulic system.The sealing that equipment manufacturer's hydraulic cylinder carries is import Special-shaped rubber seal, expensive, and in high dust atmosphere and vibration overall situation, service life is short.After sealing damage, substantial amounts of dust is by the hydraulic oil system that enters here, the pollution of hydraulic oil can be caused, oil granularity is made to exceed standard, that causes hydraulic cylinder body and piston rod pulls the problems such as abrasion, slide valve jam, oil pressure exception, leakage of oil, and the replacing of these parts or reparation, it is required to the expense of costliness, has an effect on the properly functioning of equipment simultaneously.Changing the sealing that hydraulic cylinder carries, then to need coal pulverizer and hydraulic loading system all to exit standby, is all disintegrated by hydraulic cylinder.And the workload of the hydraulic cylinder that disintegrates is big, technical difficulty is high, and the repair time is long, all has a significant impact the safe and stable operation of unit and exerting oneself.
Summary of the invention
This utility model is in order to solve because sealing effectiveness is the best, and dust easily enters medium-speed pulverizer hydraulic cylinder, the problem causing hydraulic system fault, and then provides a kind of ZGM113 medium-speed pulverizer hydraulic cylinder using new type sealing device.
This utility model adopts the following technical scheme that
A kind of ZGM113 medium-speed pulverizer hydraulic cylinder using new type sealing device, including hydraulic cylinder body and hydraulic cylinder piston rod, the junction of described hydraulic cylinder body and hydraulic cylinder piston rod is provided with external sealing device, includes the slip cap and the fixed cover that are set on hydraulic cylinder piston rod, the lower end of fixed cover is connected with hydraulic cylinder body, and the two ends of slip cap are fixed on hydraulic cylinder piston rod and fixed cover by retaining ring respectively.
Described fixed cover stretches in the installing hole of slip cap, and both junctions are positioned at the distance of the upper surface holding 40-80mm of the stage casing of fixed cover, slip cap lower surface and fixed cover disk.
Upper skeleton oil sealing, lower skeleton oil sealing it is provided with in described retaining ring.
Described fixed cover is provided with O RunddichtringO with the connection surface of hydraulic cylinder body.
This utility model is to reducing hydraulic loading system fault, and prevention hydraulic cylinder damages, and promotes hydraulic oil quality, reduces spare part expense, reduces maintenance cost obvious, and security performance and profit space to unit have a certain upgrade, and have the advantages that
1, good seal performance, each seal point at least two seals is protected, is thoroughly completely cut off dust pollution.
2, replacing is installed convenient.Need not during installation exit hydraulic oil system, be not required to carry out isolation of system operation, installment work both can complete within half an hour.
3, service life is long.This device uses Q235 steel as matrix, it is possible to effectively prevents external mechanical shock, has certain protective effect simultaneously to hydraulic cylinder piston rod.
4, cost performance is high.A set of novel external sealing device cost is approximately the 1/2 of a set of import sealing member, and its body part is substantially without damaged condition occur.Its sealing member 3-5 under normal circumstances changes the most both may be used.
5, hydraulic cylinder will not be produced harm, and there is certain protective effect.This sealing device is arranged on the inoperative position of hydraulic cylinder piston, need not welding, punching etc. and has the work affecting structural strength, simultaneously because the sealing that hydraulic cylinder is carried by its installation serves protective effect, extend the service life of equipment during installation.
6, non-maintaining.After this sealing device is installed, daily needs to check slip cap fastening bolt, is not required to carry out other and safeguards.This bolt once can be tightened up during coal pulverizer overhaul every time.Sealing ring in slip cap was once checked replacing in about 3 years.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the stress figure that coal pulverizer loads transmission system；
In figure: 1-hydraulic cylinder piston rod, 2-retaining ring, 3-upper skeleton oil sealing, 4-slip cap, 5-lower skeleton oil sealing, 6-fixed cover, 7-O RunddichtringO, 8-hydraulic cylinder sealing, 9-hydraulic cylinder body.
Detailed description of the invention
In conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
Medium-speed pulverizer hydraulic cylinder as shown in Figure 1 is the construction features utilizing oil cylinder itself, on the basis of not changing original equipment structure, utilizes the feature of cylinder body and piston rod, and a set of external ram increased on the basis of original sealing seals.It is made up of fixed cover and servo-actuated axle sleeve two parts, it is achieved static and dynamic sealing function.Fixed cover is arranged on oil cylinder body, utilizes original bolt hole on oil cylinder to be attached with oil cylinder, uses O to seal with oil cylinder.Servo-actuated axle sleeve is arranged on piston shaft, is connected with piston shaft by locking hoop, uses outside framework oil seal to seal with the sealing of piston shaft, and with piston shaft synchronous follow-up.
The installation and debugging of equipment:
1, cleaning hydraulic cylinder and piston rod surface, removes the foreign material such as floating rust, paint.
2, by fixed cover lower surface mounting O-shaped sealing ring, and appropriate dry oil lubrication fat is smeared at lower surface and endoporus.
3, by fixed cover through piston rod, the bolt hole on hydraulic cylinder is utilized to be connected with hydraulic cylinder.
4, the assembling of slip cap: be installed on slip cap by upper and lower outside framework oil seal, is then loaded onto by figure dress retaining ring, snap ring, makes outside framework oil seal fix, keep retaining ring lock-screw to be in relaxed state, to facilitate cylinder piston rod to pass slip cap.
5, inside slip cap, appropriate dry oil lubrication fat is smeared.
6, the slip cap assembled is inserted in piston rod above piston rod.
7, adjust the position on the big piston rod of slip cap, make the distance of slip cap lower surface and the upper surface holding 40-80mm of fixed cover disk.
8, the lock-screw of lock sleeve on fastening slip cap, makes slip cap be connected with piston rod jail.
9, the connection of piston rod and coal pulverizer lower link is recovered.
10, lifting grinding roller, checks whether slip cap bound position meets the requirements.
Transformation result is followed the tracks of:
This sealing device started in 2012 to be applied to Zhang Shan generating coal pulverizer hydraulic system, and 12 set hydraulic systems of 12 coal pulverizers amount to 36 hydraulic cylinders and the most all install.Currently used more than 3 years, the fault rate of coal pulverizer hydraulic oil system is decreased obviously, and maintenance work day and the spare part expense of input are decreased obviously, and safeguards that work day declines about 180 every year, saves spare part expense about about 280,000 yuan.The means such as professional utilizes hydraulic system to make regular check on, oil assay carry out irregular follow-up investigations, find that hydraulic oil quality is good, and hydraulic cylinder carries the basic No leakage of sealing, and hydraulic cylinder piston rod is without abrasion, and hydraulic system can keep stable operation for a long time.Thoroughly solve the oil that hydraulic oil system for many years enters coal dust, dust causes to deteriorate, hydraulic cylinder piston and bad seals, regulate the problems such as fault, Maintenance and Repair workload are big frequently, it is effectively guaranteed safe and stable, the Effec-tive Function of coal pulverizer hydraulic loading system, maintenance cost reduces substantially, can promote the use of in thermal power plant.
Claims (4)
1. the ZGM113 medium-speed pulverizer hydraulic cylinder using new type sealing device, including hydraulic cylinder body (9) and hydraulic cylinder piston rod (1), it is characterized in that: the junction of described hydraulic cylinder body (9) and hydraulic cylinder piston rod (1) is provided with external sealing device, includes the slip cap (4) and the fixed cover (6) that are set on hydraulic cylinder piston rod (1), the lower end of fixed cover (6) is connected with hydraulic cylinder body (9), and the two ends of slip cap (4) are fixed on hydraulic cylinder piston rod (1) and fixed cover (6) by retaining ring (2) respectively.
The ZGM113 medium-speed pulverizer hydraulic cylinder of employing new type sealing device the most according to claim 1, it is characterised in that: described fixed cover (6) stretches in the installing hole of slip cap (4), and both junctions are positioned at the stage casing of fixed cover (6).
The ZGM113 medium-speed pulverizer hydraulic cylinder of employing new type sealing device the most according to claim 2, it is characterised in that: it is provided with upper skeleton oil sealing (3), lower skeleton oil sealing (5) in described retaining ring (2).
The ZGM113 medium-speed pulverizer hydraulic cylinder of employing new type sealing device the most according to claim 3, it is characterised in that: described fixed cover (6) is provided with O RunddichtringO (7) with the connection surface of hydraulic cylinder body (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620343098.5U CN205592223U (en) | 2016-04-22 | 2016-04-22 | Adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620343098.5U CN205592223U (en) | 2016-04-22 | 2016-04-22 | Adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205592223U true CN205592223U (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620343098.5U Expired - Fee Related CN205592223U (en) | 2016-04-22 | 2016-04-22 | Adopt novel sealing device's ZGM113 medium speed pulverizer pneumatic cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN205592223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547829A (en) * | 2018-06-29 | 2018-09-18 | 神华国华广投（柳州）发电有限责任公司 | A kind of medium-speed pulverizer hydraulic cylinder and accumulator connection structure |
-
2016
- 2016-04-22 CN CN201620343098.5U patent/CN205592223U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547829A (en) * | 2018-06-29 | 2018-09-18 | 神华国华广投（柳州）发电有限责任公司 | A kind of medium-speed pulverizer hydraulic cylinder and accumulator connection structure |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20180422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |