CN213331495U - Plunger sealing device of reciprocating plunger pump - Google Patents
Plunger sealing device of reciprocating plunger pump Download PDFInfo
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- CN213331495U CN213331495U CN202022203794.5U CN202022203794U CN213331495U CN 213331495 U CN213331495 U CN 213331495U CN 202022203794 U CN202022203794 U CN 202022203794U CN 213331495 U CN213331495 U CN 213331495U
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Abstract
The utility model discloses a reciprocal plunger pump plunger sealing device: the plunger piston is arranged between the plunger cylinder and the plunger rod and comprises a packing fixing sleeve, an oil ring, a sealing packing, a check ring and a pre-tightening spring which are sequentially contacted and pressed from outside to inside along the radial direction, an inner hole of the plunger cylinder is a multi-stage stepped hole with a large outside and a small inside, one stepped surface is positioned at the junction of the check ring and the pre-tightening spring, and a rigid supporting part of the check ring is formed. The utility model discloses a sealing filler still assists through the step face in the plunger cylinder body to compress tightly except carrying out elasticity through the pretension spring and compressing tightly, and sealing filler is still in the state of compressing tightly when the pretension spring became invalid, can guarantee sealing performance in the certain time to the no trouble operating time of extension plunger pump.
Description
Technical Field
The utility model relates to a mining fully mechanized mining equipment technical field, concretely relates to reciprocal plunger pump plunger sealing device.
Background
The mining plunger pump comprises an emulsion pump, a spray pump, a water injection pump and the like for a coal mine. The emulsion pump is a necessary device of a comprehensive mechanized coal mining working face of a coal mine and is a power source of a hydraulic support of the working face. The spray pump is also a necessary device for the comprehensive mechanized coal mining working face of the coal mine, is matched with a working face coal mining machine, and plays a role in reducing and controlling the dust concentration of the working flour, cooling the coal mining machine and fire fighting of the working face. The water injection pump is used for injecting ultrahigh-pressure water into a coal seam to achieve the purpose of coal mining. The mining plunger pump adopts a horizontal three-cylinder or horizontal five-cylinder overall structure, and drives components such as a crankshaft, a connecting rod, a sliding block, a plunger piston and the like to move through transmission of a primary cylindrical gear, so that mechanical energy is converted into hydraulic energy.
The application of the mining plunger pump is originated in western countries such as British, Germany and the like in the 50 th century, and China starts to import application in the 70 th century and gradually realizes localization. The early mining plunger pump has low limited yield of coal mining equipment and low labor intensity of workers, and adopts a structure of a single separated liquid suction valve group and a liquid discharge valve group at home and abroad. Along with the great improvement of the mining intensity and efficiency of the coal mine working face, the types of the mining plunger pumps are more and more.
The plunger is a core component of the plunger pump, and the sealing performance of the plunger and the cylinder directly influences the performance of the plunger pump. The plunger and the cylinder body are mostly sealed by adopting packing, namely, a dynamic sealing device is realized through the pretightening and the self-tightening action of medium pressure. The sealing performance of the seal is dependent upon the resilient preload member, which, if damaged, can cause the packing seal to fail.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reliability for sealing performance between plunger and the cylinder body, the utility model provides a reciprocal plunger pump plunger sealing device.
The utility model adopts the technical scheme as follows: a reciprocating plunger pump plunger sealing device is arranged between a plunger cylinder body and a plunger rod and comprises a filler fixing sleeve, an oil ring, a sealing filler, a retainer ring and a pre-tightening spring which are sequentially contacted and pressed from outside to inside along the radial direction, wherein an inner hole of the plunger cylinder body is a multi-stage stepped hole with a large outside and a small inside, one stepped surface is positioned at the junction of the retainer ring and the pre-tightening spring, and a rigid supporting part of the retainer ring is formed.
The utility model has the advantages that: the utility model discloses a sealing filler still assists through the step face in the plunger cylinder body to compress tightly except carrying out elasticity through the pretension spring and compressing tightly, and sealing filler is still in the state of compressing tightly when the pretension spring became invalid, can guarantee sealing performance in the certain time to the no trouble operating time of extension plunger pump.
Preferably: and an annular groove is formed in the inner wall of the retainer ring.
Preferably: the plunger cylinder body is provided with an oil hole corresponding to the oil ring and is lubricated by an oil dropping screw and an oil rope inside the plunger cylinder body.
Preferably: a trapezoidal sealing ring is further arranged between the packing fixing sleeve and the plunger rod.
Preferably: the outer end of the filler fixing sleeve is provided with a round nut, and the filler fixing sleeve and the round nut are of an integral structure or a welding combined structure.
Drawings
Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention.
Fig. 2 is a schematic sectional view of the plunger cylinder and the plunger rod in the embodiment of the present invention.
Fig. 3 is a schematic sectional view of the plunger cylinder in the embodiment of the present invention.
Fig. 4 is a schematic sectional view of a retainer ring in an embodiment of the present invention.
The plunger piston comprises a plunger piston cylinder body 1, a plunger rod 2, a filler fixing sleeve 3, an oil ring 4, a sealing filler 5, a check ring 6, a pre-tightening spring 7, a trapezoidal sealing ring 8, a round nut 9, an oil hole 101, an oil dripping screw rod 102, an oil rope 103, an annular groove 601 and a supporting step surface A.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
In the examples, as shown in FIGS. 1 to 3: a reciprocating plunger pump plunger sealing device is arranged between a plunger cylinder body 1 and a plunger rod 2 and comprises a filler fixing sleeve 3, an oil ring 4, a sealing filler 5, a retainer ring 6 and a pre-tightening spring 7 which are sequentially contacted and pressed from outside to inside along the radial direction, wherein an inner hole of the plunger cylinder body 1 is a multi-stage stepped hole with a large outside and a small inside, one stepped surface is positioned at the junction of the retainer ring 6 and the pre-tightening spring 7, and a rigid supporting part of the retainer ring 6 is formed. The sealing filler 5 of this embodiment is not only elastically compressed by the pre-tightening spring 7, but also is compressed by the aid of the step surface a in the plunger cylinder 1, and the sealing filler 5 is still in a compressed state when the pre-tightening spring 7 fails, so that the sealing performance can be ensured within a certain time, and the fault-free working time of the plunger pump is prolonged.
In the example, as shown in fig. 4: the inner wall of the retainer ring 6 is provided with an annular groove 601. The retainer ring 6 of the present embodiment serves as a barrier for the packing seal 5, so that the sealing effect does not need to be considered, and by providing the annular groove 601, the friction coefficient between the retainer ring 6 and the plunger rod 2 can be reduced, thereby reducing wear.
In the embodiment, as shown in fig. 1 and 2: the plunger cylinder body 1 is provided with an oil hole 101 corresponding to the oil ring 4, and oil is supplied and lubricated through an oil dropping screw 102 and an oil rope 103 inside. The embodiment adopts the typical oil rope 103, and the lubricating oil can be kept in a cleaner state by utilizing the siphon and capillary action to absorb oil and then be lubricated, so that the continuous lubricating effect is good.
In the embodiment, as shown in fig. 1 and 2: and a trapezoidal sealing ring 8 is also arranged between the packing fixing sleeve 3 and the plunger rod 2. The trapezoid sealing ring 8 of the embodiment can seal the lubricating oil to be exposed, and has an auxiliary sealing effect.
In the example, as shown in fig. 2: the outer end of the filler fixing sleeve 3 is provided with a round nut 9, and the filler fixing sleeve 3 and the round nut 9 are of an integral structure or a welding combined structure. The packing fixing sleeve 3 of the embodiment is connected with the plunger cylinder body 1 through a thread pair, so that the adjustment is very convenient; the special packing fixing sleeve 3 and the round nut 9 adopt a combined piece, the manufacturing process is simple, and the processing is convenient.
It is obvious that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Obvious changes or variations coming within the spirit of the invention are intended to be covered by the scope of the invention.
Claims (5)
1. The utility model provides a reciprocal plunger pump plunger sealing device sets up between plunger cylinder body (1) and plunger rod (2), includes by outer inside, along fixed cover (3) of packing that radially contacts in proper order and compress tightly, oil ring (4), sealing filler (5), retaining ring (6) and pretension spring (7), its characterized in that: the inner hole of the plunger cylinder body (1) is a multi-stage stepped hole with a large outer part and a small inner part, one stepped surface is positioned at the junction of the retainer ring (6) and the pre-tightening spring (7), and a rigid supporting part of the retainer ring (6) is formed.
2. The reciprocating plunger pump plunger seal arrangement of claim 1, wherein: the inner wall of the retainer ring (6) is provided with an annular groove (601).
3. The reciprocating plunger pump plunger seal arrangement of claim 1, wherein: the plunger cylinder body (1) is provided with an oil hole (101) corresponding to the oil ring (4), and oil is supplied and lubricated through an oil dropping screw (102) and an oil rope (103) inside the plunger cylinder body.
4. The reciprocating plunger pump plunger seal arrangement of claim 1, wherein: a trapezoidal sealing ring (8) is also arranged between the packing fixing sleeve (3) and the plunger rod (2).
5. The reciprocating plunger pump plunger seal arrangement of claim 1 or 4, wherein: the outer end of the filler fixing sleeve (3) is provided with a round nut (9), and the filler fixing sleeve (3) and the round nut (9) are of an integral structure or a welding combined structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022203794.5U CN213331495U (en) | 2020-09-30 | 2020-09-30 | Plunger sealing device of reciprocating plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022203794.5U CN213331495U (en) | 2020-09-30 | 2020-09-30 | Plunger sealing device of reciprocating plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN213331495U true CN213331495U (en) | 2021-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022203794.5U Active CN213331495U (en) | 2020-09-30 | 2020-09-30 | Plunger sealing device of reciprocating plunger pump |
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| CN (1) | CN213331495U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046243A (en) * | 2021-11-10 | 2022-02-15 | 宝鸡航天动力泵业有限公司 | Sand prevention sealing device for plunger of horizontal directional drilling mud pump |
| CN114623075A (en) * | 2022-05-13 | 2022-06-14 | 宁波合力机泵股份有限公司 | Vertical reciprocating pump hydraulic end and booster pump applying same |
| CN115045827A (en) * | 2022-07-25 | 2022-09-13 | 大庆市金拓石油机械制造有限公司 | Split self-pre-tightening plunger seal assembly for high-pressure plunger pump |
-
2020
- 2020-09-30 CN CN202022203794.5U patent/CN213331495U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046243A (en) * | 2021-11-10 | 2022-02-15 | 宝鸡航天动力泵业有限公司 | Sand prevention sealing device for plunger of horizontal directional drilling mud pump |
| CN114623075A (en) * | 2022-05-13 | 2022-06-14 | 宁波合力机泵股份有限公司 | Vertical reciprocating pump hydraulic end and booster pump applying same |
| CN114623075B (en) * | 2022-05-13 | 2022-08-19 | 宁波合力机泵股份有限公司 | Vertical reciprocating pump hydraulic end and booster pump applying same |
| CN115045827A (en) * | 2022-07-25 | 2022-09-13 | 大庆市金拓石油机械制造有限公司 | Split self-pre-tightening plunger seal assembly for high-pressure plunger pump |
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