CN2054496U - Driven well pump piston combined steel core - Google Patents
Driven well pump piston combined steel core Download PDFInfo
- Publication number
- CN2054496U CN2054496U CN 89212891 CN89212891U CN2054496U CN 2054496 U CN2054496 U CN 2054496U CN 89212891 CN89212891 CN 89212891 CN 89212891 U CN89212891 U CN 89212891U CN 2054496 U CN2054496 U CN 2054496U
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- steel core
- piston
- nylon
- core body
- core
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to a single-action driven well pump piston combined steel core, which is composed of a steel core body and a changeable self-lubricating nylon core-guarding ring which is installed on a flange ring groove of the steel core body. The core-guarding ring is made of SYN-851-D cast nylon, the external surface is provided with an annular groove and a straight flute by being cut, and the outer diameter is slightly bigger than the outer diameter of the flange of the steel core body. Consequently, piston weight can be reduced, centering effect of the piston is enhanced, mutual abrasion of the steel core and cylinder sleeve is prevented, and the utility model has a changeable gap function, which extends the service life of the piston and the cylinder sleeve.
Description
The utility model relates to a kind of combination steel core of single-acting wellbore pump piston, particularly a kind of having from moistening the combination steel core that nylon protects the core ring, can be used for various single-acting drilling pumps with the piston rubber cup of all kinds of " about the size regulations of three cylinder single-acting slurry pump easily damaged partss " that meet that in August, 1984, Scientific Research Institute of Petroleum Exploration and Development Planning machinery was formulated is supporting, belong to the engineering applied technical fields.
Existing single-acting wellbore pump piston steel core, only have the garden cylinder and the flange that match with rubber cup, and rubber cup root external diameter equates with the steel core flange outer diameter, owing between cylinder sleeve and piston, be difficult to seek desirable best clearance, and be difficult to guarantee good centering between piston and cylinder sleeve, thereby often be prone to piston rubber and be squeezed into the gap, piston steel core body directly contacts with cylinder sleeve and to mill, seriously abrades and the cylinder sleeve that weares and teares.In addition, the high temperature that produces of the surface friction rubber cup of also easily burning.Piston steel core quality is bigger, and the dynamic load that causes is impacted also big; Can not reuse again after the steel core wearing and tearing; Because the additional radial pressure that die misalignment produced can make piston produce eccentric wear.Therefore, along with increasing of the pressure of the drill makes the life-span of wellbore pump piston shorter and shorter, rig downtime, easily damaged parts expense and working strength of workers have been increased greatly.
Task of the present utility model is that a kind of improved piston in combination steel core will be provided, it has from moistening nylon protects the core ring, can make and have rational gap between piston and cylinder sleeve, what prevent rubber clamp-ons and avoids the contacting of steel core body and cylinder sleeve, wearing and tearing and scratch, also piston there are antifriction, centralizing function, prolong the working life of cylinder sleeve.The steel core body can with supporting being repeatedly used of rubber cup that meets in August, 1984 Scientific Research Institute of Petroleum Exploration and Development Planning machinery defined of each manufacturer production.
Task of the present utility model is finished as follows:
Be equipped with on the annular groove of piston steel core body flange from moistening nylon and protect the core ring, the quality and the dynamic load that have alleviated the steel core body are thus impacted.Protect and cut circular groove and straight trough on the core ring outer surface, circular groove is convenient to the abrasive particle in the collection work liquid and spraying water is evenly distributed along protecting the core ring surface, straight trough can make the sub-fraction of spraying water enter the piston friction surface through groove, help the discharge of abrasive dust, also piston is had the cooling and lubricating effect simultaneously.Protect core ring external diameter and be slightly larger than steel core body flange outer diameter, can avoid steel core body and cylinder sleeve directly contact, to mill with produce the high temperature piston rubber of burning, also prolonged the working life of cylinder sleeve.Protect the core ring material and have imbibition and expanded by heating characteristic, because the fit dimension that protects between core ring and cylinder sleeve is paid matching design by sliding, there is bigger primary clearance, at the piston initial operating stage, rubber modulus is bigger, be difficult for flowing, piston is after operation a period of time, rubber generation stress relaxation, just flow easily and clamp-on the gap, protect the core ring this moment and also will expand gradually and seal the gap, prevent clamp-oning of rubber, thereby the function with variable gap has successfully solved " best clearance " problem.Protect the core ring and also have antifriction function, reduced fricative heat.The characteristic of protecting the core ring material also makes it can compensate automatically after frayed, and piston is had centralizing function, has strengthened the centering of piston and cylinder sleeve, has reduced the eccentric wear of piston.Protect the core ring and can change easily after wearing and tearing, piston steel core body can repeat repeatedly to use, and is convenient economical again.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.
Accompanying drawing is the longitudinal sectional drawing of a kind of concrete structure of the present utility model.
With reference to accompanying drawing, steel core body (4) has garden cylinder and the flange that cooperates with the standard rubbers leather cup.Have the confession installation in the upper-end surface of flange and protect the annular groove of core ring (1) usefulness, protect on the annular groove that core ring (1) is sleeved on steel core body (4) flange from profit nylon, the external diameter that protects core ring (1) is slightly larger than the flange outer diameter of steel core body (4), protect core ring (1) be worn the back replaceable, steel core body (4) can repeat repeatedly to use.Protect and cut one annular groove (2) and six roads and parallel axes on core ring (1) outer surface and, can make spraying water that piston is lubricated the abrasive particle in cooling and the collection work liquid and be convenient to the discharge of abrasive dust along the surface cool straight trough (3) of garden Zhou Junbu.Protecting core ring (1) from profit nylon adopts SYN-851-D casting nylon to make, have antifriction and imbibition and expanded by heating characteristic, expansion compensation automatically after wearing and tearing, the good gap that keeps cylinder sleeve and piston space, prevent that rubber from clamp-oning, strengthen the centering effect, prevent the piston eccentric wear and reduced the generation of frictional heat.Matching design is paid in the gap of protecting between core ring (1) and cylinder sleeve by sliding.
Combination steel core body of the present utility model (4) is compared with used piston steel core body, can improve 2～6 times of piston lifes, prolongs 40% of cylinder sleeve working life, and the repeat usage of steel core body (2) can reach 80%.
Claims (3)
1, a kind of combination steel core of single-acting wellbore pump piston, nylon protects core ring (1) and steel core body (4) is formed by moistening certainly, it is characterized in that protecting on the annular groove that core ring (1) is sleeved on steel core body (4) flange from moistening nylon, the external diameter that protects core ring (1) is slightly larger than the flange outer diameter of steel core body (4).
2, by the described piston in combination steel core of claim 1, it is characterized in that protecting and having cut one annular groove (2) and six road surface cool grooves (3) on core ring (1) outer surface from moistening nylon, six road surface cool grooves (3) all are the straight troughs with parallel axes, and along garden Zhou Junbu.
3,, it is characterized in that protecting core ring (1) and adopting SYN-851-D casting nylon to make from moistening nylon by the described piston in combination steel core of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89212891 CN2054496U (en) | 1989-04-08 | 1989-04-08 | Driven well pump piston combined steel core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89212891 CN2054496U (en) | 1989-04-08 | 1989-04-08 | Driven well pump piston combined steel core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2054496U true CN2054496U (en) | 1990-03-14 |
Family
ID=4868982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89212891 Withdrawn CN2054496U (en) | 1989-04-08 | 1989-04-08 | Driven well pump piston combined steel core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2054496U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101096998B (en) * | 2006-06-27 | 2012-09-05 | 通用电气公司 | Variable clearance packing ring and promoting method |
-
1989
- 1989-04-08 CN CN 89212891 patent/CN2054496U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101096998B (en) * | 2006-06-27 | 2012-09-05 | 通用电气公司 | Variable clearance packing ring and promoting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |