CN207500103U - A kind of plunger and plunger pump - Google Patents
A kind of plunger and plunger pump Download PDFInfo
- Publication number
- CN207500103U CN207500103U CN201721292956.9U CN201721292956U CN207500103U CN 207500103 U CN207500103 U CN 207500103U CN 201721292956 U CN201721292956 U CN 201721292956U CN 207500103 U CN207500103 U CN 207500103U
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- China
- Prior art keywords
- plunger
- nut
- stopper head
- plunger body
- head
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Abstract
The utility model is related to a kind of plunger and plunger pumps, the plunger pump includes above-mentioned plunger, the plunger of existing plunger pump is solved since structure and assembly technology limit, local heat treatmet can only be carried out to the bulb part of stopper head, thus lead to problems such as low production efficiency, stopper head hardness unevenness, product quality that can not ensure.Wherein plunger includes plunger body, the stopper head being sleeved in plunger body, nut；Plunger head-tail is provided with screw thread, the threaded connection of nut and plunger head-tail, and nut maximum outside diameter is less than plunger body tail portion aperture.The plunger of the utility model has the advantages that part quality and production efficiency are high, at low cost, and plunger body outer circle can effectively be avoided to deform, ensure performance.The fields such as lathe, crane, oil exploration equipment are can be widely applied to, are particularly suitable for the goat more demanding to performance.
Description
Technical field
The utility model belongs to reciprocating pump field, and in particular to a kind of plunger and plunger pump.
Background technology
Plunger part is the critical component of pluger type hydraulic pump, it and cylinder bore constitute the most basic work of plunger pump and hold
Chamber.Plunger part moves back and forth in cylinder body, causes cylinder bore cavity volume size variation, promotes plunger pump oil suction, oil extraction.One
Platform plunger pump need to generally use seven sets of plungers, and production requirement amount is big.Plunger pump oil suction, oil extraction process are all happened at cylinder bore cavity volume
Interior therefore higher to the quality requirement of plunger part, the gap between cylinder bore is also very crucial：Gap is too small, causes
There is interim card, wear phenomenon in plunger motion；Gap is excessive, and it will cause oil leaks and efficiency decline.Therefore, the processing technology of plunger
There is tremendous influence to plunger pump.
Existing piston structure is riveted type, as shown in Figure 1, after stopper head 2a is inserted in plunger body 3a, utilizes plunger head-tail
Fabrication hole stopper head outer diameter is rushed it is big, so as to which stopper head be made to be fastenedly connected with plunger body.During plunger pump work, swash plate and plunger
Stopper head bulb contact always, swash plate is provided with the inclined-plane at certain inclination angle, can be with inclined-plane and reciprocal when plunger is rotated with cylinder body
Movement.Due to the bulb part of stopper head and the swash plate contact force of plunger pump is larger and running frequency is higher (1000rpm), therefore will
Stopper head bulb part is asked to have higher intensity and wearability, so need to carry out plunger ball part heat treatment reinforcement, but
Tail portion riveting but cannot be really up to the mark, otherwise easy embrittlement.
Since the structure and assembly technology of this plunger limit, this plunger can only carry out local heat treatmet, i.e., may only
Stopper head bulb part is heat-treated, riveting portion cannot be heat-treated.If being heat-treated to riveting portion, this can be made
Portion of material hardness increases, brittleness becomes larger, in riveting because stress is excessive it is possible that fracture phenomena.And only to bulb part
Heat treatment then can only be by staff's single progress every time, and efficiency is low and each stopper head hardness can be caused uneven, gives birth to by the gross
The stopper head hardness of production also differs, and processing quality can not all ensure.Existing riveted type plunger part, is connect using sleeving and riveting
Form makes stopper head compress plunger body, can be because sleeving and riveting deformation cause plunger body excircle part to deform, so as to meeting during sleeving and riveting
Cause plunger body excircle dimension that can not ensure within the margin of tolerance, cause plunger part that can not be packed into cylinder bore or influence production
Moral character energy.
Invention content
The purpose of this utility model is to provide a kind of plunger and plunger pump, to solve the prior art because of structure and assembly technology
Limitation can only carry out local heat treatmet to the bulb part of stopper head, caused by low production efficiency, stopper head hardness it is uneven,
The problems such as product quality can not ensure.
The technical solution of the utility model is：
A kind of plunger including plunger body, the stopper head being sleeved in plunger body, is characterized in that, further includes nut；Institute
It states plunger head-tail and is provided with screw thread, the threaded connection of the nut and plunger head-tail, nut maximum outside diameter is less than plunger body
Tail portion aperture；The coupling part of the stopper head and plunger body is clearance fit, and nut is screwed into the tailing screw flight part of stopper head
Stopper head and plunger body to be bonded.
Further, for ease of the assembling of nut, nut end face is provided with flat recess and nut outer profile is circle.
Further, stopper head is inserted in the part in plunger body, the ladder shaft-like successively decreased successively for head to tail diameter；
The nut outer diameter is clearance fit with plunger body tail portion aperture size.After nut is tightened, nut sleeving and riveting to outer circle is become
Shape, it is possible to be stuck in the hole of plunger body corresponding position, so as to make nut is firm not fall off.
Further, make firm do not fall off of nut that can also use following more preferably method：Stopper head is inserted in plunger body
Part be the ladder shaft-like successively decreased successively of head to tail diameter；Plunger body tail portion includes hole one and hole two, nut outer diameter ruler
Very little and plunger body tail hole one and two diameter of hole are clearance fit, and the gap of wherein nut outer diameter and hole one is more than and hole two
Gap, nut tighten rear thickness direction no more than hole one.After nut sleeving and riveting to outer circle is deformed, it can not only be stuck in plunger body
In hole one, it can also utilize hole two that it is prevented to come off, so as to further prevent nut from coming off.
Further, to save space, being easily installed, the diameter of threaded portion is less than part adjacent thereto on stopper head
Diameter.
The stability being connect to be further ensured that stopper head with plunger body, the plunger further include spring washer, the spring pad
Circle is matched with nut.
Meanwhile the utility model additionally provides a kind of plunger pump for including above-mentioned plunger.
During the plunger part assembling of plunger pump, first piston shoes are sleeved on stopper head, in stopper head and plunger body contact site
Outer circle retaining rubber is applied, then stopper head is inserted in plunger body, spring washer is put into, thread locking glue is applied on screw thread, then will
Nut is screwed at the screw thread of plunger head-tail, after nut is tightened, nut sleeving and riveting to outer circle is deformed, is stuck in plunger body vallecular cavity,
Ensure that its is firm, does not fall off.
Compared with prior art, the utility model has the following advantages：
1st, part quality and production efficiency are high, have saved cost.The utility model by being threaded in plunger head-tail,
Using nut fixed column chock plug and plunger body this structure type, stopper head is allow to carry out whole heat treatment process, is made by the gross
Part heat treatment hardness is more unified, uniform, and heat treatment process only needs setting program control that can complete, it can be achieved that batch is raw
Into so as to save cost.
2nd, plunger body outer circle is effectively avoided to deform, ensures performance.The utility model uses screw nut non-movable piston
Head, sleeving and riveting nut prevent from coming off, and the gap setting between nut and plunger body avoids sleeving and riveting deformation force and is transferred to plunger body, from
And avoid the deformation of plunger body outer circle, it is ensured that stopper head, effective assembling of plunger body and properties of product.
Description of the drawings
Fig. 1 is the structure diagram of existing plunger；
Fig. 2 is the example structure schematic diagram of the utility model plunger；
The structure diagram of nut used in Fig. 3 embodiments；
Fig. 4 is the left view of nut shown in Fig. 3；
Fig. 5 is the example structure schematic diagram of the utility model plunger pump；
Wherein：1a-piston shoes, 2a-stopper head, 3a-plunger body, 1-piston shoes, 2-stopper head, 3-plunger body, 4-bullet
Spring washer, 5-nut, 6-plunger, 7-swash plate, 8-return plate, 9-cylinder body, 301-hole one, 302-hole two.
Specific embodiment
Further narration in detail is done to the utility model below with reference to attached drawing：
As shown in Fig. 2, the plunger includes plunger body 3, the stopper head 2 being sleeved in plunger body 3, spring washer 4, nut 5；
As shown in Figures 3 and 4,5 end face of nut is provided with flat recess and nut outer profile is circle；
As shown in Fig. 2, the part that stopper head 2 is inserted in plunger body 3 is the ladder to successively decrease successively from head to tail diameter
Shaft-like, 2 tail portion of stopper head are provided with screw thread, first spring washer 4 are put at screw thread, then nut 5 is screwed into 2 tail portion of stopper head
At screw thread, stopper head 2 is made to be connect with plunger body 3 and (be coated with thread locking glue before being screwed at screw thread)；3 tail portion of plunger body is set
There are hole 1 and hole 2 302,5 outer diameter of nut is gap with 3 tail hole 1 of plunger body and 2 302 diameter dimension of hole
The gap in cooperation, wherein 5 outer diameter of nut and hole 1 is more than the gap with hole 2 302, and nut 5 is tightened rear thickness direction and do not surpassed
Via 1 that is, in hole 1, after the nut sleeving and riveting after tightening is deformed to outer circle, can not only be stuck in plunger body 3
Hole 1 in, can also utilize hole 2 302 that it is prevented to come off, so as to further preventing nut 5 from coming off.
As shown in Fig. 5, Fig. 2, which includes plunger 6, and plunger pump first assembles plunger part, step is such as in assembling
Under：First piston shoes 1 are sleeved on stopper head, and apply outer circle retaining rubber in contact site, then stopper head 2 is inserted in plunger body 3, so
Nut 5 is screwed at the screw thread of 3 tail portion of stopper head afterwards, applies thread locking glue before being screwed at screw thread, it, will after nut 5 is tightened
Nut sleeving and riveting to outer circle deforms, and is stuck in the vallecular cavity of 3 corresponding position of plunger body, ensures that its is firm, does not fall off.The column that will be assembled
After plunger member is packed into return plate 8, then it is whole be packed into the hole of plunger pump cylinder body 9, and complete according to a conventional method swash plate 7 and other
The assembling of parts forms plunger pump.
Above-described embodiment is that one of the utility model is specifically described, and is not formed to scope of protection of the utility model
Any restriction, based on the embodiment in the utility model, those of ordinary skill in the art are not before creative work is made
It puts, all other embodiments obtained shall fall within the protection scope of the present invention.
Claims (7)
1. a kind of plunger, including plunger body (3), the stopper head (2) being sleeved in plunger body；It is characterized in that：Further include nut
(5)；Stopper head (2) tail portion is provided with screw thread, the nut (5) and the threaded connection of stopper head (2) tail portion, nut (5)
Maximum outside diameter is less than plunger body (3) tail portion aperture.
2. a kind of plunger according to claim 1, it is characterised in that：Nut (5) outer profile is round, nut (5)
End face is provided with flat recess.
3. a kind of plunger according to claim 2, it is characterised in that：The stopper head (2) is inserted in the portion in plunger body (3)
Point, the ladder shaft-like successively decreased successively for head to tail diameter；Nut (5) outer diameter and plunger body (3) tail portion aperture
Size is clearance fit.
4. a kind of plunger according to claim 2, it is characterised in that：The stopper head (2) is inserted in the portion in plunger body (3)
Point, the ladder shaft-like successively decreased successively for head to tail diameter；The plunger body tail portion includes hole one (301) and hole two (302),
Nut (5) outer diameter is clearance fit with plunger body (3) tail hole one (301) and hole two (302) diameter, wherein spiral shell
The gap in female (5) outer diameter and hole one (301) is more than the gap with hole two (302), and nut (5) tightens rear thickness direction no more than hole
One (301).
5. a kind of plunger according to any one of claims 1 to 4, it is characterised in that：The threaded portion on the stopper head (2)
The diameter divided, less than the diameter of part adjacent thereto.
6. a kind of plunger according to claim 4, it is characterised in that：Further include spring washer (4), the spring washer
(4) it is matched with nut (5).
7. a kind of plunger pump, it is characterised in that：Including a kind of plunger of claim 1 to 6 any one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292956.9U CN207500103U (en) | 2017-10-09 | 2017-10-09 | A kind of plunger and plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292956.9U CN207500103U (en) | 2017-10-09 | 2017-10-09 | A kind of plunger and plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207500103U true CN207500103U (en) | 2018-06-15 |
Family
ID=62500238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721292956.9U Active CN207500103U (en) | 2017-10-09 | 2017-10-09 | A kind of plunger and plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207500103U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654365A (en) * | 2017-10-09 | 2018-02-02 | 陕西航天动力高科技股份有限公司 | A kind of plunger and plunger pump |
-
2017
- 2017-10-09 CN CN201721292956.9U patent/CN207500103U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654365A (en) * | 2017-10-09 | 2018-02-02 | 陕西航天动力高科技股份有限公司 | A kind of plunger and plunger pump |
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