CN211975302U - Plunger structure for preventing hydraulic clamping stagnation - Google Patents
Plunger structure for preventing hydraulic clamping stagnation Download PDFInfo
- Publication number
- CN211975302U CN211975302U CN202020273686.2U CN202020273686U CN211975302U CN 211975302 U CN211975302 U CN 211975302U CN 202020273686 U CN202020273686 U CN 202020273686U CN 211975302 U CN211975302 U CN 211975302U
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- plunger
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- cylinder section
- bulb
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Abstract
The utility model provides a prevent plunger structure of hydraulic pressure jamming, its characterized in that: the plunger comprises a plunger body, the plunger body is including locating the downthehole cylinder section of plunger and being located the plunger hole outside with the bulb of piston shoe mutually supporting, cylinder section and bulb smooth transition connect prevent that piston shoe and cylinder section from taking place to interfere, the central line of cylinder section and bulb is located same straight line, this internal central line along cylinder section and bulb of plunger is equipped with the through-hole that is used for carrying liquid, cylinder section side is equipped with the ring channel that is used for improving lubricating condition and storage impurity along the circumference. The utility model discloses plunger simple structure, easy to process can play balanced yawing force, improve the effect of lubricated condition and storage foul, avoid the hydraulic pump at the in-process of work, have the foreign matter to arouse the plunger jamming in cylinder body plunger hole and the plunger complex clearance, have reduced the wearing and tearing between cylinder body plunger hole and plunger, avoid the plunger pump to lose efficacy early, have improved the life and the value of utilizing of plunger pump.
Description
Technical Field
The utility model relates to a prevent plunger structure of hydraulic pressure jamming belongs to plunger pump hydraulic pressure class product technical field.
Background
The swash plate type axial plunger pump is an important part in a hydraulic system, changes the volume in a plunger cavity by the reciprocating motion of the plunger in the plunger cavity to realize oil absorption and oil discharge, is a positive displacement hydraulic pump, and for the swash plate type axial plunger pump, a thrust plate and a cylinder body, and the cylinder body and the plunger are two important pairs of friction pairs, so that the efficiency and the service life of the pump are directly influenced.
The cylinder body and the plunger are used as important friction pairs of the swash plate type plunger pump, the plunger and the cylinder hole form precise clearance fit during assembly, the plunger moves axially while rotating at high speed along with the cylinder body in the working process of the plunger pump, so that the plunger generates certain displacement, the flow change of the plunger pump is realized, and the friction pairs play an important role in the swash plate type plunger pump. However, the currently used plunger pump often has a clamping stagnation phenomenon in work, and many problems exist in disassembling the test piece, the most serious is that the plunger pump is subjected to abnormal sound and increased internal discharge caused by hair-plucking phenomenon due to hair-plucking between the cylinder body and the plunger and early and serious abrasion between the cylinder body and the plunger, and even the more serious damage to the plunger pump causes great pollution to the whole hydraulic system.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the hydraulic pump is at the in-process of work, the easy jamming phenomenon's that appears between cylinder body plunger hole and the plunger problem.
In order to solve the problem, the technical scheme of the utility model provides a prevent plunger structure of hydraulic pressure jamming, its characterized in that: the plunger comprises a plunger body, the plunger body is including locating the downthehole cylinder section of plunger and being located the plunger hole outside with the bulb of piston shoe mutually supporting, cylinder section and bulb smooth transition connect prevent that piston shoe and cylinder section from taking place to interfere, the central line of cylinder section and bulb is located same straight line, this internal central line along cylinder section and bulb of plunger is equipped with the through-hole that is used for carrying liquid, cylinder section side is equipped with the ring channel that is used for improving lubricating condition and storage impurity along the circumference.
Preferably, the cylindrical section is connected with the ball head through a concave arc surface.
Preferably, the through hole comprises a first hole and a second hole, the first hole is arranged in the cylindrical section, the second hole is arranged in the ball head, the first hole is connected with the second hole, and the hole diameters of the first hole and the second hole are different.
Preferably, the pore diameter of the first pore is larger than that of the second pore.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses plunger simple structure, easy to process can play balanced yawing force, improve the effect of lubricated condition and storage foul, avoid the hydraulic pump at the in-process of work, have the foreign matter to arouse the plunger jamming in cylinder body plunger hole and the plunger complex clearance, have reduced the wearing and tearing between cylinder body plunger hole and plunger, avoid the plunger pump to lose efficacy early, have improved the life and the value of utilizing of plunger pump.
Drawings
FIG. 1 is a sectional view of a hydraulic pump according to the present invention;
fig. 2 is a sectional view of the structure of the present invention.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model relates to a prevent plunger structure of hydraulic pressure jamming is arranged in hydraulic pressure plunger pump, including the plunger body, plunger body one end is the bulb 1 with 8 precision fits of piston shoes, and the other end is the cylinder section 3 with 7 precision fits of plunger hole, is connected with 2 smooth transition of concave arc surface between bulb 1 and the cylinder section 3, takes place to interfere with cylinder section 3 when preventing 8 rotations of piston shoes. An annular groove 4 is formed in the side face of the cylindrical section 3 along the circumference, so that the lubricating condition is improved, dirt and impurities are stored, and hydraulic clamping stagnation of the plunger in the working process can be avoided; the edges at the two ends of the annular groove 4 need to be deburred, and sharp edges are not allowed to exist, so that the plunger is prevented from scratching the wall surface of the plunger hole 7 of the cylinder body in the working process. The central lines of the cylindrical section 3 and the ball head 1 are located on the same straight line, a first hole 5 and a second hole 6 with different apertures are machined in the plunger body along the central lines of the cylindrical section 3 and the ball head 1, the first hole 5 is connected with the second hole 6, the first hole 5 and the second hole 6 are arranged in the ball head 1, and therefore high-pressure oil is introduced between two sliding surfaces of the sliding shoe 8 and the swash plate friction pair to form an oil film.
Because the plunger rotates at a high speed in the working process and is precisely matched with the sliding shoes 8 and the plunger hole 7, in order to ensure that the plunger has certain strength and wear resistance, the plunger is subjected to nitriding and grinding processing by using 38 CrMoAl.
Claims (4)
1. The utility model provides a prevent plunger structure of hydraulic pressure jamming which characterized in that: the plunger comprises a plunger body, the plunger body is including locating cylinder section (3) in plunger hole (7) and being located outside plunger hole (7) bulb (1) of mutually supporting with piston shoes (8), cylinder section (3) and bulb (1) smooth transition connect prevent that piston shoes (8) and cylinder section (3) from taking place to interfere, the central line of cylinder section (3) and bulb (1) is located same straight line, this internal central line along cylinder section (3) and bulb (1) of plunger is equipped with the through-hole that is used for carrying liquid, cylinder section (3) side is equipped with ring channel (4) that are used for improving lubricating condition and storage impurity along the circumference.
2. A hydraulic stagnation prevention ram structure as claimed in claim 1, wherein: the cylindrical section (3) is connected with the ball head (1) through a concave arc surface (2).
3. A hydraulic stagnation prevention ram structure as claimed in claim 1, wherein: the through hole comprises a first hole (5) arranged in the cylindrical section (3) and a second hole (6) arranged in the ball head (1), the first hole (5) is connected with the second hole (6), and the hole diameters of the first hole (5) and the second hole (6) are different.
4. A hydraulic stagnation prevention ram structure as claimed in claim 3, wherein: the aperture of the first hole (5) is larger than that of the second hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020273686.2U CN211975302U (en) | 2020-03-06 | 2020-03-06 | Plunger structure for preventing hydraulic clamping stagnation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020273686.2U CN211975302U (en) | 2020-03-06 | 2020-03-06 | Plunger structure for preventing hydraulic clamping stagnation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211975302U true CN211975302U (en) | 2020-11-20 |
Family
ID=73393587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020273686.2U Active CN211975302U (en) | 2020-03-06 | 2020-03-06 | Plunger structure for preventing hydraulic clamping stagnation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211975302U (en) |
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2020
- 2020-03-06 CN CN202020273686.2U patent/CN211975302U/en active Active
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