CN203272051U - Sleeve-cylinder-type high-low pressure plunger pump - Google Patents
Sleeve-cylinder-type high-low pressure plunger pump Download PDFInfo
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- CN203272051U CN203272051U CN 201320261154 CN201320261154U CN203272051U CN 203272051 U CN203272051 U CN 203272051U CN 201320261154 CN201320261154 CN 201320261154 CN 201320261154 U CN201320261154 U CN 201320261154U CN 203272051 U CN203272051 U CN 203272051U
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- plunger
- cylinder body
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- pressure
- low pressure
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Abstract
The utility model discloses a sleeve-cylinder-type high-low pressure plunger pump which comprises a cylinder body, an inner plunger and an outer plunger. An axial threaded hole used for fixing the inner plunger is formed in the central axis of the bottom of the cylinder body. An axial through hole is formed in the central axis of the inner plunger. An outer thread matched with the threaded hole is arranged at the lower end portion of the inner plunger. The inner plunger is in threaded connection with the cylinder body. A blind hole is formed in the position of the central axis of the lower end face of the outer plunger. The outer plunger is in sleeved connection between the inner side of the cylinder body and the outer side of the inner plunger. A cavity formed by the end portion of the outer plunger, the outer side of the inner plunger and the inner side of the cylinder body is a low-pressure plunger cavity. A cavity formed by the blind hole of the outer plunger and the inner plunger is a high-pressure plunger cavity. A low-pressure oil inlet hole communicated with the low-pressure plunger cavity is formed in the bottom of the cylinder body. The cylinder body, the inner plunger and the outer plunger are sealed with each other through a sealing device. A reset spring is arranged inside the high-pressure plunger cavity. The sleeve-cylinder-type high-low pressure plunger pump has the advantages that the low-pressure plunger is used as the high-pressure plunger cylinder body, the whole space of a pump body is saved, the cost is saved, the machining difficulty of the cylinder body is reduced, and the service life of the pump body is prolonged.
Description
Technical field
The utility model relates to a kind of high low pressure plunger pump, especially double-cylinder type high low pressure plunger pump; Belong to the oil hydraulic pump technical field.
Background technique
plunger pump commonly used mostly is single plunger or is that integrated type high low pressure plunger is that the high low pressure plunger is that the single component high-pressure plunger becomes axial step axle construction at the low-pressure plunger front end at present, the former must arrange two groups of pump housings as realizing the high low pressure function, one is the low-pressure pump body group, two is high pressure pump housing group, when will seeking common ground, this need two groups of operating devices to make respectively its corresponding pump action, inconvenient operation, flexibly, frequently switch between two groups of pump housings operator under the operating mode that needs friction speed and pressure, oil-way board volume as two groups of pump housings of carrying will reach greatly simultaneously, two groups of pump housings could be in hands-off situation reasonable Arrangement on oil-way board, as seen use two groups of plunger pumps can take the space of equipment, and can raise the cost.although the latter adopts the integrated type piston structure to save one group of operating device, the oil-way board volume also reduces, but because its high low pressure plunger is an integral body, plungers length is length sums both, the cylinder body length that coordinates with plunger also lengthens, adopt the integrated type piston structure, parts machining process is complicated, requirement on machining accuracy is high, emphasis is embodied on the coaxality of two plungers, the coaxality of plunger case two plunger holes that requirement simultaneously is mated is also high, otherwise when moving axially in cylinder body, easily blocks plunger, prior art to the solution of the problems referred to above for to change the high low pressure plunger into the assembling movable by original integral type, but it improves the cylinder body volume high problem of work technology difficulty greatly that still do not solve.
Therefore, design a kind of sealing means reliable, little, the easy to operate plunger pump that takes up room is the association area problem demanding prompt solution.
The model utility content
The purpose of this utility model is to provide a kind of double-cylinder type high low pressure plunger pump, and the technical problem that the utility model actual demand solves is:
Existing plunger pump adopts plunger integral body or split jointing type structure, shares a cylinder body, plunger, cylinder body processing technology complexity, and requirement on machining accuracy is high, easily blocks when plunger moves axially in cylinder body, and the work technology difficulty is high greatly for the cylinder body volume.
The utility model is taked following technological scheme:
A kind of double-cylinder type high low pressure plunger pump comprises: cylinder body, inner plunger and outer plunger; Described cylinder base medial axis is provided with in order to the fixing axial screw thread hole of inner plunger; The inner plunger medial axis is provided with axial hole, and the underpart of inner plunger is provided with the outside thread that is complementary with tapped hole, and inner plunger and cylinder body are spirally connected; Position, medial axis, outer plunger lower end surface is provided with blind hole, and outer plunger is socketed between cylinder body inboard and the inner plunger outside, and outer plunger end, the inner plunger outside and the inboard cavity volume that forms of cylinder body are the low-pressure plunger chamber; The cavity volume that the blind hole of outer plunger and the through hole of inner plunger form is the high-pressure plunger chamber; Described cylinder base is provided with the low pressure oil inlet hole that is communicated with the low-pressure plunger chamber, and when low-pressure plunger chamber volume increases, hydraulic oil is sucked by the low pressure oil inlet hole; When described high-pressure plunger chamber volume increases, hydraulic oil is sucked by the tapped hole of cylinder body, the through hole of inner plunger; Cylinder body, inner plunger and outer plunger seal by seal arrangement between any two.
Described seal arrangement comprises sealed groove and the seal ring that matches, and described seal ring comprises an O type circle, the 2nd O type circle and the 3rd O type circle, and wherein, an O type circle is located between cylinder body and inner plunger; The 2nd O type circle is located between outer plunger and inner plunger; The 3rd O type circle is located between cylinder body and outer plunger; These O type circles consist of sealing in making in twos between part, the effect of isolation high low pressure plunger cavity.
Described blind hole is step hole, step hole is inner-cavity structure, intracavity diameter is large, aperture cylindrical section diameter is little, " cylinder body " of blind hole formation inner plunger (implication of cylinder body is to play the cylinder body effect of high-pressure plunger herein, but not part of cylinder block described in the utility model).
Described inner plunger and cylinder body maintain static, and the outer plunger to-and-fro motion is worked the high low pressure plunger pump simultaneously.
Be provided with a Returnning spring that outer plunger is replied in described high-pressure plunger chamber, outer plunger is replied, realize the oil suction automatically simultaneously of high low pressure plunger cavity.
Characteristics of the present utility model are: outer plunger is namely that low-pressure plunger is again high-pressure plunger " cylinder body ", has saved the high pressure cylinder body space on axial direction, reaches the purpose that reduces the cylinder body volume.
The beneficial effects of the utility model are:
1) high pressure pump housing group and low-pressure pump body are combined and are integral, and cancel the low pressure pump operating device, and be easy to operate, efficient is high.
2) low-pressure plunger as the high-pressure plunger cylinder body, is saved pump housing overall space, is reduced costs.
3) reduce the cylinder body difficulty of processing, the high-low pressure integrated structure of the non-employing of cylinder body has avoided causing because of the machining accuracy problem quality problems of the seizure of plunger, the working life of having improved the pump housing.
4) built-in Returnning spring makes plunger return, oil suction automatically, substitutes the peripheral hardware resetting-mechanism, makes hydraulic system succinct.
Description of drawings
Fig. 1 is the mounting structure schematic diagram of the utility model double-cylinder type high low pressure plunger pump;
Fig. 2 is the generalized section of the utility model double-cylinder type high low pressure plunger pump;
Wherein: 1, cylinder body 101, tapped hole 102, low pressure oil inlet hole 2, an O type circle 3, inner plunger 301, through hole 302, outside thread 4, the 2nd O type circle 5, the 3rd O type circle 6, Returnning spring 7, outer plunger 701, blind hole 801, low-pressure plunger chamber 802, high-pressure plunger chamber.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.
As depicted in figs. 1 and 2, a kind of double-cylinder type high low pressure plunger pump comprises: cylinder body 1, inner plunger 3 and outer plunger 7; Described cylinder body 1 medial axis, bottom is provided with the axial screw thread hole 101 in order to fixing inner plunger 3; Inner plunger 3 medial axis are provided with axial hole 301, and the underpart of inner plunger 3 is provided with the outside thread 302 that is complementary with tapped hole 101, and inner plunger 3 is spirally connected with cylinder body 1; Outer plunger 7 positions, medial axis, lower end surface are provided with blind hole 701, and outer plunger 7 is socketed between cylinder body 1 inboard and inner plunger 3 outsides, and outer plunger 7 ends, inner plunger 3 outsides and the inboard cavity volume that forms of cylinder body 1 are low-pressure plunger chamber 801; The cavity volume that the blind hole 701 of outer plunger 7 and the through hole of inner plunger 301 form is high-pressure plunger chamber 802; Described cylinder body 1 bottom is provided with the low pressure oil inlet hole 102 that is communicated with low-pressure plunger chamber 801, and when low-pressure plunger chamber 801 volumes increase, hydraulic oil is sucked by low pressure oil inlet hole 102; When high-pressure plunger chamber 802 volumes increase, hydraulic oil is sucked by the tapped hole 101 of cylinder body 1, the through hole 301 of inner plunger 3; Cylinder body 1, inner plunger 3 and outer plunger 7 seal by seal arrangement between any two.
Described seal arrangement comprises sealed groove and the seal ring that matches, and described seal ring comprises an O type circle 2, the 2nd O type circle 4 and the 3rd O type circle 5, and wherein, an O type circle 2 is located between cylinder body 1 and inner plunger 3; The 2nd O type circle 4 is located between outer plunger 7 and inner plunger 3; The 3rd O type circle 5 is located between cylinder body 1 and outer plunger 7; These O type circles consist of sealing in making in twos between part, the effect of isolation high low pressure plunger cavity.
Described blind hole is step hole, step hole is inner-cavity structure, intracavity diameter is large, aperture cylindrical section diameter is little, " cylinder body " of blind hole formation inner plunger 3 (implication of cylinder body is to play the cylinder body effect of high-pressure plunger herein, but not part of cylinder block described in the utility model).
Described inner plunger 3 maintains static with cylinder body 1, and outer plunger 7 to-and-fro motion are worked high and low pressure plunger pump (801,802) simultaneously; Also be provided with Returnning spring 6 in high-pressure plunger chamber 802, outer plunger 7 is replied, realize high and low pressure plunger cavity (801,802) oil suction automatically simultaneously.
Can also see from Fig. 1 and Fig. 2, a described O type circle 2 consists of radially static seal between cylinder body 1 and inner plunger 3.
In addition to the implementation, all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (4)
1. a double-cylinder type high low pressure plunger pump, is characterized in that: comprising: cylinder body, inner plunger and outer plunger; Described cylinder base medial axis is provided with in order to the fixing axial screw thread hole of inner plunger; The inner plunger medial axis is provided with axial hole, and the underpart of inner plunger is provided with the outside thread that is complementary with tapped hole, and inner plunger and cylinder body are spirally connected; Position, medial axis, outer plunger lower end surface is provided with blind hole, and outer plunger is socketed between cylinder body inboard and the inner plunger outside, and outer plunger end, the inner plunger outside and the inboard cavity volume that forms of cylinder body are the low-pressure plunger chamber; The cavity volume that the blind hole of outer plunger and inner plunger form is the high-pressure plunger chamber; Described cylinder base is provided with the low pressure oil inlet hole that is communicated with the low-pressure plunger chamber, and when low-pressure plunger chamber volume increases, hydraulic oil is sucked by the low pressure oil inlet hole; When described high-pressure plunger chamber volume increases, hydraulic oil is sucked by the tapped hole of cylinder body, the through hole of inner plunger; Cylinder body, inner plunger and outer plunger seal by seal arrangement between any two.
2. a kind of double-cylinder type high low pressure plunger pump according to claim 1 is characterized in that: described high-pressure plunger is provided with the Returnning spring that outer plunger is replied in the chamber.
3. a kind of double-cylinder type high low pressure plunger pump according to claim 1, it is characterized in that: described blind hole is step hole, intracavity diameter is large, aperture cylindrical section diameter is little.
4. a kind of double-cylinder type high low pressure plunger pump according to claim 1, it is characterized in that: described inner plunger and cylinder body maintain static, and the outer plunger to-and-fro motion is worked the high low pressure plunger pump simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320261154 CN203272051U (en) | 2013-05-13 | 2013-05-13 | Sleeve-cylinder-type high-low pressure plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320261154 CN203272051U (en) | 2013-05-13 | 2013-05-13 | Sleeve-cylinder-type high-low pressure plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203272051U true CN203272051U (en) | 2013-11-06 |
Family
ID=49502484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320261154 Withdrawn - After Issue CN203272051U (en) | 2013-05-13 | 2013-05-13 | Sleeve-cylinder-type high-low pressure plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203272051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291576A (en) * | 2013-05-13 | 2013-09-11 | 嘉善海力达工具有限公司 | Telescopic cylindrical type high-low pressure plunger pump |
-
2013
- 2013-05-13 CN CN 201320261154 patent/CN203272051U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291576A (en) * | 2013-05-13 | 2013-09-11 | 嘉善海力达工具有限公司 | Telescopic cylindrical type high-low pressure plunger pump |
| CN103291576B (en) * | 2013-05-13 | 2016-04-13 | 嘉善海力达工具有限公司 | Telescopic cylindrical type high-low pressure plunger pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |