CN201994755U - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- CN201994755U CN201994755U CN2011200504128U CN201120050412U CN201994755U CN 201994755 U CN201994755 U CN 201994755U CN 2011200504128 U CN2011200504128 U CN 2011200504128U CN 201120050412 U CN201120050412 U CN 201120050412U CN 201994755 U CN201994755 U CN 201994755U
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- CN
- China
- Prior art keywords
- sealing device
- oil
- connecting shaft
- sand
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a sealing device, which comprises an outer tube, a connecting shaft, a sand scraping knife and a sealing section, wherein the connecting shaft extends and passes through the whole sealing device, the sand scraping knife is positioned between the outer tube and the connecting shaft, the sealing section comprises a filter and a movable sealing ring, the upper sides and the lower sides of the filter and the movable sealing ring are respectively provided with wear-resisting rings, and the upper end and the lower end of the sealing section are fixed by two fixing screw nuts. The sealing device has the beneficial effects that the mutual action between the connecting shaft and the sand scrapping knife and between the filter and the movable sealing ring are realized in the oil-extraction work state, fine sand in an oil well is effectively prevented from entering a gap part of a stator and a rotor of an oil sucking machine, the abrasion of a stator and a rotor of a linear motor is reduced, and the service life of the linear motor for the oil sucking machine is obviously prolonged. The sealing device has the advantages that the structure is simple, the manufacture cost is low, and the installation and the use are convenient.
Description
[technical field]
The utility model relates to the sealing device that a kind of oil pumper linear electric motors are used.
[background technology]
Along with the continuous development of science, provide the oil pumping mode of power progressively can provide power to be replaced by linear electric motors by the machine of kowtowing.When using the more oil well of used for oil extractor linear electric motors exploitation sand content, be mixed in fine sand in the crude oil and enter the gap portion of stator and mover along with the reciprocating motion of linear electric motors, the wearing and tearing of motor have been aggravated, greatly reduce the efficient of linear electric motors, shortened useful life, and the hidden danger that causes motor sand card has been arranged.
The purpose of this utility model is can prevent that for the used for oil extractor linear electric motors provide a kind of fine sand in the crude oil from entering the device in the motor gap, strengthens the sand control capability of linear electric motors, increases work efficiency and stability.
[utility model content]
In order to strengthen the sand control capability of linear electric motors, to increase work efficiency and stable purpose, the utility model provides a kind of can prevent that the fine sand in the crude oil from entering the sealing device in the motor gap.
This sealing device comprises: urceolus, extend through the connecting axle of whole sealing device, strike-off a cutter and a seal section between described urceolus and connecting axle; Described seal section comprises filter, dynamic seal ring, and its middle filtrator and dynamic seal ring are installed wear ring respectively in both sides up and down, and sealing section upper and lower side is fixed by hold-down nut.
Wherein, the described cutter of strike-ofing is a cone through the processing skewed slot, and its upper end fits in described connecting axle surface.
Wherein, the corresponding described cutter lower end of strike-ofing of described urceolus has a clearance hole.
Wherein, the corresponding urceolus in the described cutter lower end of strike-ofing has a clearance hole.
Wherein, described dynamic seal ring adopts unidirectional V-seal dynamic seal ring.
Wherein, described seal section upper and lower side is fixed by hold-down nut.
The utility model beneficial effect is under the oil extraction operation state, interaction between connecting axle and the cutter of strike-ofing, filter and the dynamic seal ring, prevented that effectively the fine sand in the oil well from entering the stator of oil pumper and the gap portion of mover, the wearing and tearing of linear motor stator electric and mover have been reduced, significantly improved the useful life of used for oil extractor linear electric motors, the sealing apparatus structure is simple, cost is low, easy to install.
[description of drawings]
The utility model will be further described in conjunction with execution mode with reference to the accompanying drawings.
Fig. 1 is the structural representation of the sealing device of the utility model used for oil extractor linear electric motors;
Fig. 2 is the strike-off structural representation of blade insert of the utility model.
[embodiment]
Below in conjunction with description of drawings and embodiment the utility model is further specified.
As shown in Figure 1, be the structural representation of the utility model sealing device embodiment.This sealing device comprises urceolus 300, extends through the connecting axle 400 of whole sealing device, strike-off a cutter 500 and a seal section 700 between urceolus 300 and connecting axle 400, sealing section 700 comprises filter 730, dynamic seal ring 740, and its middle filtrator 730 and dynamic seal ring are installed wear ring 720 and following wear ring 750 respectively in both sides about in the of 740.In the present embodiment, seal section 700 upper and lower sides are fixing by hold-down nut 710,760.Particularly, up and down wear ring 720,750 and filter 730 and dynamic seal ring 740 by last hold-down nut 710, down hold-down nut 760 is fixed on the fixed position between urceolus 300 and the connecting axle 400.As shown in Figure 2, be the strike-off structural representation of blade insert of the utility model.
In the present embodiment, the cutter 500 of strike-ofing is a cone through the processing skewed slot, and its upper end fits in connecting axle 400 surfaces.
In the present embodiment, urceolus 300 has a clearance hole 600 corresponding to the lower end of the cutter 500 of strike-ofing.
Use in the linear electric motors course of work in oil pumping, the oil-feed screen casing 100 of oil well pump is constantly drawn crude oil, and the fine sand that is mingled with in the crude oil is along with the reciprocating motion and the self gravitation effect of connecting axle 400 enter into the sealing device.The cutter 500 of strike-ofing in the sealing device is a cone structure, itself has elasticity, the cutter 500 of strike-ofing remains and is fitted on the connecting axle 400, and in connecting axle 400 pumped process, fine sand was discharged from the clearance hole 600 of urceolus 300 along the bevel direction of the cutter 500 of strike-ofing.
Crude oil is discharged most sand grains by clearance hole 600, and remaining only a few sand grains enters into seal section 700, successively passes through filter 73 and dynamic seal ring 740, and sand grains is completely blocked and enters the used for oil extractor linear electric motors.
In the present embodiment, the filtering accuracy of filter 730 is 0.005MM, is formed by the stainless steel wire compacting.
In the present embodiment, dynamic seal ring 740 adopts unidirectional V-seal dynamic seal ring, is wear-resisting and corrosion-resistant material.Wear ring 720,750 is installed in the both sides up and down of filter 730 and dynamic seal ring 740 respectively up and down, with supporting connecting axle 400, guarantee the linearity in the connecting axle 400 reciprocating motion processes, purpose is fully to play the requirement of isolating sand grains fully in order to ensure dynamic seal ring 740.
In the present embodiment, urceolus 300 upper ends are connected with oil well pump, particularly, are connected with oil well pump joint 200; Urceolus 300 lower ends are connected with the stator of linear electric motors, particularly, are connected with linear motor stator electric adapter 800; Connecting axle 400 lower ends are connected with the mover of linear electric motors.Under the oil extraction operation state, interaction between connecting axle and the cutter of strike-ofing, filter and the dynamic seal ring, prevented that effectively the fine sand in the oil well from entering the stator of oil pumper and the gap portion of mover, the wearing and tearing of linear motor stator electric and mover have been reduced, significantly improved the useful life of used for oil extractor linear electric motors, the sealing apparatus structure is simple, cost is low, easy to install.
Only be the utility model preferred embodiment below, but it does not limit practical range of the present utility model, promptly do not depart from equivalent variations and modification that claim of the present utility model is done, must belong to protection range of the present utility model.
Claims (5)
1. sealing device, its feature comprises: urceolus, extend through the connecting axle of whole sealing device, strike-off a cutter and a seal section between described urceolus and connecting axle;
Described seal section comprises filter, dynamic seal ring, and its middle filtrator and dynamic seal ring both sides are up and down installed wear ring and following wear ring respectively.
2. sealing device according to claim 1 is characterized in that: the described cutter of strike-ofing is a cone through the processing skewed slot, and its upper end fits in described connecting axle surface.
3. sealing device according to claim 1 is characterized in that: the corresponding urceolus in the described cutter lower end of strike-ofing has a clearance hole.
4. sealing device according to claim 1 is characterized in that: described dynamic seal ring adopts unidirectional V-seal dynamic seal ring.
5. sealing device according to claim 1 is characterized in that: described seal section upper and lower side is fixed by hold-down nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200504128U CN201994755U (en) | 2011-02-28 | 2011-02-28 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200504128U CN201994755U (en) | 2011-02-28 | 2011-02-28 | Sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201994755U true CN201994755U (en) | 2011-09-28 |
Family
ID=44671230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200504128U Expired - Fee Related CN201994755U (en) | 2011-02-28 | 2011-02-28 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201994755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865055A (en) * | 2012-11-06 | 2013-01-09 | 陈天为 | Underground linear pumping unit |
-
2011
- 2011-02-28 CN CN2011200504128U patent/CN201994755U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865055A (en) * | 2012-11-06 | 2013-01-09 | 陈天为 | Underground linear pumping unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110928 Termination date: 20180228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |