CN102261553B - Plunger-type lubricating grease pump - Google Patents
Plunger-type lubricating grease pump Download PDFInfo
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- CN102261553B CN102261553B CN201110121033.8A CN201110121033A CN102261553B CN 102261553 B CN102261553 B CN 102261553B CN 201110121033 A CN201110121033 A CN 201110121033A CN 102261553 B CN102261553 B CN 102261553B
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- plunger
- pump
- exhaust port
- oil
- lubricating grease
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Abstract
The invention discloses a plunger-type lubricating grease pump. The plunger-type lubricating grease pump comprise a pump body and a plunger, wherein an oil outlet and an oil sucking hole are formed in the front end and the middle part of the pump body; the plunger is provided with an oil pumping end; the plunger is arranged at the back end of the pump body and the oil pumping end is put into a pump cavity of the pump body; a pump body vent is formed in the back end of the pump body; a plunger cavity and a one-way valve which is used for controlling fluid to flow from the pump cavity to the plunger cavity are arranged in the plunger; and a first plunger vent for communicating the plunger cavity and the pump body vent when the oil pumping end moves to a position between the oil sucking hole and an oil outlet and is a certain distance away from the oil sucking hole is arranged on the plunger. By using pressure difference and combining the compressibility of gas, the plunger-type lubricating grease pump can automatically exhaust the gas accumulated in the pump cavity under a certain condition, so that a gas blockage phenomenon is effectively eliminated, the normal work of a lubricating oil pump is ensured, the working efficiency is obviously improved, and manpower and materials are saved.
Description
Technical field
The present invention relates to a kind of pump, particularly relate to a kind of plunger-type lubricating grease pump.
Background technique
In plunger-type lubricating grease pump working procedure, plunger can move to oil suction position in pump chamber, utilize negative pressure to extract the oil-sucking hole of the lubricant grease in fuel tank from the pump housing in pump chamber, lubricant grease to oil outlet direction straight line motion until pump oil pole extreme position, pumps from oil outlet by plunger again.
But lubricant grease is have certain viscosity and denseness, can not complete free-pouring fluid, be wherein inevitably mixed with bubble, therefore lubricating grease pump may suction part gas simultaneously in oil-absorbing process; After accumulating a certain amount of gas in pump chamber, once plunger moves to oil suction position in pump chamber, air pressure in pump chamber may be greater than tank pressure and be difficult to form underbalance effect, " vent plug " phenomenon is caused to make lubricating grease pump cannot normally oil suction, certainly can not pump lubricant grease from oil outlet, make lubricating grease pump enter idling conditions.
When lubricating grease pump occur this " vent plug " phenomenon and cannot normally oil suction time, usually arrestment is needed to run and taken out from fuel tank by lubricating grease pump, then the mode of artificial exhaust is taked to fix a breakdown, this mode not only inefficiency, affect project progress, and also may there are some hidden danger in safety etc. in manual operation.
Summary of the invention
The main technical problem to be solved in the present invention is, provides a kind of plunger-type lubricating grease pump, automatically can discharge the too much gas of accumulation in pump chamber, ensures the normal work of lubricating grease pump.
For solving the problems of the technologies described above, the invention provides a kind of plunger-type lubricating grease pump, comprise the pump housing and plunger, described pump housing front end and middle part are respectively equipped with oil outlet and oil-sucking hole, described plunger has pump oil end, described plunger is arranged on described pump housing rear end and is placed in the pump chamber of the described pump housing by pump oil end, described pump housing rear end is also provided with pump housing exhaust port, be provided with plunger cavity in described plunger and flow to the one-way valve of described plunger cavity for controlling fluid from described pump chamber, described plunger is also provided with when the end motion of described pump oil is between described inlet port and oil outlet, and apart from during described inlet port certain distance by the first plunger exhaust port that described plunger cavity is communicated with described pump housing exhaust port.
Further, described certain distance is at least greater than 20% of the total kilometres of described pump oil end, and described total kilometres refer to that the stroke moved between oil suction position and pump oil pole extreme position held by described pump oil.
Preferably, described certain distance equals the total kilometres of described pump oil end.
In a kind of mode of execution, described plunger is also provided with the second plunger exhaust port be communicated with described pump housing exhaust port by described plunger cavity when described pump oil end is in oil suction position, described second plunger exhaust port is between described one-way valve and the first plunger exhaust port.
Described pump housing exhaust port can comprise the two groups of pump housing exhaust ports be communicated with described plunger cavity with the second plunger exhaust port respectively by described first plunger exhaust port.
Preferably, the difference in the aperture of described second plunger exhaust port and described pump housing exhaust port is within 30%.
Preferably, the outer surface of described plunger has the second groove of annular, and described second plunger exhaust port extends to described plunger cavity from the bottom of described second groove.
Preferably, the outer surface of described plunger has the first groove of annular, and described first plunger exhaust port extends to described plunger cavity from the bottom of described first groove.
Preferably, the aperture of described first plunger exhaust port is less than the half of described pump housing exhaust port.
The sealing means that described one-way valve is can be sphere, the conical surface or plane.
The invention has the beneficial effects as follows: plunger-type lubricating grease pump of the present invention by arranging pump housing exhaust port on the pump housing, plunger arranges the structures such as plunger cavity, one-way valve and the first plunger exhaust port, utilize the effect of pressure difference, and make plunger-type lubricating grease pump automatically discharge the gas of accumulation in pump chamber under certain condition in conjunction with the compressible performance of gas, effectively eliminate " vent plug " phenomenon, ensure that the normal work of lubricating grease pump, significantly improve working efficiency, save manpower and materials simultaneously.
Preferably, plunger also can arrange the second plunger exhaust port, and pass through the arrangement position of optimization first plunger exhaust port and the second plunger exhaust port, the exhaust velocity of plunger-type lubricating grease pump is significantly improved, on the basis not affecting pump oil effect, lubricating grease pump is made to recover normal working state as early as possible.
Accompanying drawing explanation
Fig. 1 is the plunger-type lubricating grease pump sectional view of an embodiment of the present invention;
Fig. 2 is the pump housing stereogram of an embodiment of the present invention;
Fig. 3 is the plunger stereogram of an embodiment of the present invention;
Phase diagram when Fig. 4 is plunger-type lubricating grease pump of the present invention existence " vent plug " phenomenon in pump oil process;
When Fig. 5 is plunger-type lubricating grease pump of the present invention existence " vent plug " phenomenon, pump oil end is in the phase diagram of pump oil pole extreme position;
Phase diagram when Fig. 6 is plunger-type lubricating grease pump of the present invention existence " vent plug " phenomenon in oilhole process;
Fig. 7 is the phase diagram of plunger-type lubricating grease pump of the present invention when there is not " vent plug " phenomenon in pump oil process;
Fig. 8 be plunger-type lubricating grease pump of the present invention when there is not " vent plug " phenomenon pump oil end in the phase diagram close to pump oil pole extreme position;
Fig. 9 is the phase diagram of plunger-type lubricating grease pump of the present invention when there is not " vent plug " phenomenon in oil-absorbing process.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
First embodiment:
Please refer to Fig. 1 and Fig. 2, the plunger-type lubricating grease pump of the present embodiment comprises the pump housing 1 and plunger 2, the pump housing 1 front end and middle part are respectively equipped with oil outlet 12 and oil-sucking hole 13, the pump chamber 11 for holding lubricant grease is formed between oil outlet 12 and oil-sucking hole 13, plunger 2 is installed in the pump housing 1 rear end, the pump oil end of plunger 2 is placed in pump chamber 11, and the other end stretches out the pump housing 1 to operate, and moves reciprocatingly under the effect of external force.
The pump housing 1 rear end is also provided with pump housing exhaust port 14, and this pump housing exhaust port 14 can be arranged on the sidewall of the pump housing 1 rear end, is communicated with the pump housing 1 inside and outside, and is located at the opening of the pump housing 1 outside and oil-sucking hole 13 is together placed in fuel tank.Also be provided with plunger cavity 21 in plunger 2, this plunger cavity 21 can extend certain length from the pump oil end of plunger 2 to plunger 2 inside, and is connected with pump chamber 11 by one-way valve 4.One-way valve 4 is arranged in plunger 2, plunger cavity 21 is flowed to from pump chamber 11 for controlling the fluid such as lubricant grease or gas, plunger 2 is in pump oil process, one-way valve 4 is forced automatically to be opened when pump chamber 11 internal pressure is increased to a certain degree, allow the portion gas in pump chamber 11 to enter plunger cavity 21, make the gas flow of accumulation in pump chamber 11 reduce and alleviate or eliminate " vent plug " phenomenon.Plunger 2 is also provided with at least one group of the first plunger exhaust port 22, this the first plunger exhaust port 22 can be arranged on the sidewall of plunger 2, before generation vent plug, lubricant grease is full of in plunger cavity 21, move between oil-sucking hole 13 and oil outlet 12 after pump oil end closes oil-sucking hole 13, and during distance inlet port 13 certain distance, plunger cavity 21 is communicated with pump housing exhaust port 14 by the first plunger exhaust port 22, one-way valve 4 is opened because pump chamber 11 pressure is higher, portion gas or lubricant grease in pump chamber 11 are outwards drained into plunger cavity 21 and fuel tank by the first plunger exhaust port 22 and pump housing exhaust port 14 successively.
Under working state, the total kilometres of plunger 2 driven pump oil end motion refer to that the stroke moved between oil suction position and pump oil pole extreme position held by pump oil.Particularly, the end motion of pump oil makes it be communicated with pump chamber 11 to opening oil-sucking hole 13 during oil-sucking hole position, and now tank pressure is greater than pump chamber 11 internal pressure, and the lubricant grease in fuel tank can be extracted in pump chamber 11 from oil-sucking hole 13 under suction function; Then plunger 2 is again to oil outlet 12 direction straight line motion until pump oil pole extreme position, now pump chamber 11 internal pressure progressively increases, lubricant grease pumps from oil outlet 12 by driven pump oil one-way valve 3, and pump oil end gets back to oil-sucking hole 13 oil suction again from pump oil pole extreme position again, circulates successively.
After measured, in pump oil process, when distance between pump oil end and inlet port 13 is at least greater than 20% of the total kilometres that pump oil is held, pump chamber 11 internal pressure is increased to a certain degree and is greater than plunger cavity 21 internal pressure and one-way valve 4 is opened, once the first plunger exhaust port 22 is communicated with pump housing exhaust port 14, open one-way valve 4 because pump chamber 11 pressure is higher, the portion gas of pump chamber 11 or lubricant grease are outwards drained into plunger cavity 21 and fuel tank by the first plunger exhaust port 22 and pump housing exhaust port 14 successively.According to specific needs, when the end motion of pump oil can be set to pump oil pole extreme position or close pump oil pole extreme position, first plunger exhaust port 22 is communicated with pump housing exhaust port 14, now, the distance of pump oil end distance inlet port 13 just in time equals or close to the oily total kilometres held of pump, this position gas pressure is higher, is beneficial to exhaust, and this process duration is very short, discharges too much lubricant grease and affect integral pump oil mass when plunger cavity 21 can be avoided outwards to be vented by the first plunger exhaust port 22.
Too much lubricant grease is discharged when being outwards vented by the first plunger exhaust port 22 to avoid plunger cavity 21 further, the aperture of the first plunger exhaust port 22 should limit within the specific limits and be less than pump housing exhaust port 14, preferably, the aperture arranging the first plunger exhaust port 22 is less than the half of pump housing exhaust port 14.
Plunger is repeatedly after shuttling movement, in pump chamber 11, the gas flow of accumulation gradually reduces or disappears completely, and by the first plunger exhaust port 22 and pump housing exhaust port 14 progressively removal of lubricant fat pump, when making plunger 2 be in oil suction position, pump chamber 11 internal pressure is less than tank pressure, to utilize the smooth oil suction of underbalance effect, " vent plug " fault can be got rid of automatically.Present embodiment does not need arrestment run and taken out from fuel tank by lubricating grease pump, does not need the measure taking artificial exhaust yet, therefore not only increases working efficiency, and avoid the hidden danger of the aspect existence such as safety.
In the present embodiment, the particular location of pump housing exhaust port 14 and the first plunger exhaust port 22, quantity, shape all can set according to specific needs.Preferably, as shown in Figure 3, the outer surface of plunger 2 has the first groove 24 of annular, first plunger exhaust port 24 extends to plunger cavity 21 from the bottom of the first groove 24, such as multiple first plunger exhaust port 24 can be evenly distributed in the first groove 24, and the first plunger exhaust port 24 and pump housing exhaust port 14 are interconnected by the first groove 24.After the gas in plunger cavity 21 or liquid enter the first groove 24 by the first plunger exhaust port 24, progressively discharged by pump housing exhaust port 14 again, not only make exhaust more smooth, and be convenient to assembling, avoid pump housing exhaust port 14 and the first plunger exhaust port 22 dislocation occurs and causes the fault that gas cannot be discharged.
As required, the sealing means of one-way valve 3 can be sphere, the conical surface or plane.
Second embodiment:
Please refer to Fig. 1 and Fig. 3, the plunger 2 of the present embodiment plunger-type lubricating grease pump is also provided with the second plunger exhaust port 23, this the second plunger exhaust port 23 is between one-way valve 4 and the first plunger exhaust port 22, when pump oil end is in oil suction position and opens inlet port 13, plunger cavity 21 is communicated with pump housing exhaust port 14 by the second plunger exhaust port 23, the gas now in plunger cavity 21 with certain pressure can expand, and in the process that the second plunger exhaust port 23 is communicated with pump housing exhaust port 14, the portion gas in plunger cavity 21 or lubricant grease are outwards drained into fuel tank by the second plunger exhaust port 23 and pump housing exhaust port 14 successively.
In present embodiment, pump housing exhaust port 14 on the pump housing 1 can only arrange one group, and the distance between the first plunger exhaust port 22 and the second plunger exhaust port 23 equals the total kilometres that pump oil is held, when the end motion of pump oil is communicated with to pump housing exhaust port 14 during pump oil pole extreme position with the first plunger exhaust port 22, when the end motion of pump oil is communicated with to pump housing exhaust port 14 during oil suction position with the second plunger exhaust port 23, lubricating grease pump can be made like this in oil-absorbing process to discharge portion gas in plunger cavity 21 or lubricant grease by the second plunger exhaust port 23, improve exhaust velocity, solve " vent plug " fault as early as possible, can avoid discharging too much lubricant grease by the first plunger exhaust port 22 in pump oil process simultaneously.
Certainly, pump housing exhaust port 14 also can arrange two groups, lays respectively at the diverse location of the pump housing 1 rear end, and the two can be communicated with plunger cavity 21 with the second plunger exhaust port 23 respectively by the first plunger exhaust port 22.
Preferably, the second plunger exhaust port 23 is equal with the aperture of pump housing exhaust port 14 or difference is less, such as, the difference in aperture both arranging within 30% so that gas or lubricant grease are discharged smoothly.
In present embodiment, the outer surface of plunger 2 also can arrange the second groove 25 of the annular being similar to the first groove 24, second plunger exhaust port 23 extends to plunger cavity 21 from the bottom of the second groove 24, play the effect being vented smoothly and being convenient to assemble equally, the particular location of the second plunger exhaust port 23, quantity, shape and arrangement mode also can set according to specific needs.
The working procedure of the present embodiment plunger-type lubricating grease pump when there is " vent plug " phenomenon is as follows:
As shown in Figure 4, when pump oil end moves from oil-sucking hole 12 to oil outlet 13 and carries out pump oil, when pump chamber 11 internal pressure increases to a certain degree and is greater than plunger cavity 21 internal pressure, one-way valve 4 is opened automatically, and the portion gas in pump chamber 11 and a small amount of lubricant grease can enter plunger cavity 21.
As shown in Figure 5, when the end motion of pump oil is to pump oil pole extreme position, pump chamber 11 internal pressure is larger, first plunger exhaust port 22 is communicated with by the fuel tank that pump housing exhaust port 14 is relatively little with pressure, one-way valve 4 is opened automatically, portion gas in pump chamber 11 can enter plunger cavity 21, and a small amount of gas simultaneously in plunger cavity 21 or lubricant grease discharge fuel tank by the first plunger exhaust port 22.
As shown in Figure 6, when the end motion of pump oil is to oil suction position, pump chamber 11 is communicated with therefore pressure with fuel tank relatively low, one-way valve 4 is closed, second plunger exhaust port 23 is communicated with fuel tank by pump housing exhaust port 14, the time continued in oil suction position due to pump oil end is longer, and the gas in plunger cavity 21 can fully expand, thus discharges a small amount of lubricant grease or gas by the second plunger exhaust port 22.
In addition, for the plunger-type lubricating grease pump of the present embodiment, if there is not bubble in lubricant grease in fuel tank or bubble is less, still can normally work when lubricating grease pump does not exist " vent plug " phenomenon and, can not produce substantial effect to oil suction and pump functional oil, its working procedure is as follows:
As shown in Figure 7, when pump oil end moves from oil-sucking hole 12 to oil outlet 13 and carries out pump oil, the first plunger exhaust port 22 is not all communicated with pump housing exhaust port 14 with the second plunger exhaust port 22, the normal pump oil of lubricating grease pump.
As shown in Figure 8, when the end motion of pump oil is to pump oil pole extreme position, first plunger exhaust port 22 is communicated with pump housing exhaust port 14, the improper discharge of a small amount of lubricant grease in plunger cavity 21, but it is because the endurance is shorter and the first less thus flow in plunger exhaust port 22 aperture is very little, very little on the integral pump oil mass impact of lubricating grease pump.
As shown in Figure 9, when the end motion of pump oil is to oil suction position, although the second plunger exhaust port 23 is communicated with pump housing exhaust port 14, but now there is not gas in plunger cavity 21, there is not gas expansion phenomenon yet, therefore the second plunger exhaust port 22 discharge section lubricant grease or gas can not be passed through, the normal oil suction of lubricating grease pump.
Above content is in conjunction with concrete mode of execution further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. a plunger-type lubricating grease pump, comprise the pump housing and plunger, described pump housing front end and middle part are respectively equipped with oil outlet and oil-sucking hole, described plunger has pump oil end, described plunger is arranged on described pump housing rear end and is placed in the pump chamber of the described pump housing by pump oil end, it is characterized in that, described pump housing rear end is also provided with pump housing exhaust port, be provided with plunger cavity in described plunger and flow to the one-way valve of described plunger cavity for controlling fluid from described pump chamber, described plunger is also provided with when the end motion of described pump oil is between described inlet port and oil outlet, and apart from during described inlet port certain distance by the first plunger exhaust port that described plunger cavity is communicated with described pump housing exhaust port,
Described plunger is also provided with the second plunger exhaust port be communicated with described pump housing exhaust port by described plunger cavity when described pump oil end is in oil suction position, described second plunger exhaust port is between described one-way valve and the first plunger exhaust port;
The outer surface of described plunger has the second groove of annular, and described second plunger exhaust port extends to described plunger cavity from the bottom of described second groove;
The outer surface of described plunger has the first groove of annular, and described first plunger exhaust port extends to described plunger cavity from the bottom of described first groove.
2. plunger-type lubricating grease pump as claimed in claim 1, is characterized in that, described certain distance is at least greater than 20% of the total kilometres of described pump oil end, and described total kilometres refer to that the stroke moved between oil suction position and pump oil pole extreme position held by described pump oil.
3. plunger-type lubricating grease pump as claimed in claim 2, is characterized in that, described certain distance equals the total kilometres of described pump oil end.
4. plunger-type lubricating grease pump as claimed in claim 2, it is characterized in that, described pump housing exhaust port comprises the two groups of pump housing exhaust ports be communicated with described plunger cavity with the second plunger exhaust port respectively by described first plunger exhaust port.
5. plunger-type lubricating grease pump as claimed in claim 2, it is characterized in that, the difference in the aperture of described second plunger exhaust port and described pump housing exhaust port is within 30%.
6. the plunger-type lubricating grease pump according to any one of claim 1 to 5, is characterized in that, the aperture of described first plunger exhaust port is less than the half of described pump housing exhaust port.
7. the plunger-type lubricating grease pump according to any one of claim 1 to 5, is characterized in that, the sealing means of described one-way valve be sphere, the conical surface or plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110121033.8A CN102261553B (en) | 2011-05-11 | 2011-05-11 | Plunger-type lubricating grease pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110121033.8A CN102261553B (en) | 2011-05-11 | 2011-05-11 | Plunger-type lubricating grease pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261553A CN102261553A (en) | 2011-11-30 |
| CN102261553B true CN102261553B (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110121033.8A Expired - Fee Related CN102261553B (en) | 2011-05-11 | 2011-05-11 | Plunger-type lubricating grease pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN102261553B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105644583B (en) * | 2016-02-16 | 2018-01-09 | 西安凯丰铁路机电设备有限公司 | DC intelligent coating equipment for track |
| CN108692172B (en) * | 2018-07-06 | 2023-08-15 | 浙江流遍机械润滑有限公司 | Pneumatic travel split-flow type multi-point grease lubrication pump |
| CN113738635A (en) * | 2021-09-15 | 2021-12-03 | 北京华德液压工业集团有限责任公司 | Plunger structure of plunger type hydraulic pump and plunger type hydraulic pump comprising same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1803312A (en) * | 1928-06-18 | 1931-05-05 | Min A Max Co | High-pressure grease gun |
| CN201269394Y (en) * | 2008-10-21 | 2009-07-08 | 张宝书 | Long-life grease gun |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6736292B2 (en) * | 2002-03-01 | 2004-05-18 | Lincoln Industrial Corporation | Pneumatic reciprocating motor and grease gun incorporating same |
| CN2765044Y (en) * | 2004-08-02 | 2006-03-15 | 上海民奥机电制造有限公司 | Direct current electric grease gun |
| CN201066028Y (en) * | 2007-02-15 | 2008-05-28 | 王和明 | Automatic air-discharging grease gun |
| CN201561255U (en) * | 2009-11-04 | 2010-08-25 | 陆兆金 | Novel grease gun |
-
2011
- 2011-05-11 CN CN201110121033.8A patent/CN102261553B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1803312A (en) * | 1928-06-18 | 1931-05-05 | Min A Max Co | High-pressure grease gun |
| CN201269394Y (en) * | 2008-10-21 | 2009-07-08 | 张宝书 | Long-life grease gun |
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| Publication number | Publication date |
|---|---|
| CN102261553A (en) | 2011-11-30 |
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