CN110145473A - A kind of detection method judging hydraulic pump self-priming performance - Google Patents
A kind of detection method judging hydraulic pump self-priming performance Download PDFInfo
- Publication number
- CN110145473A CN110145473A CN201910514367.8A CN201910514367A CN110145473A CN 110145473 A CN110145473 A CN 110145473A CN 201910514367 A CN201910514367 A CN 201910514367A CN 110145473 A CN110145473 A CN 110145473A
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- China
- Prior art keywords
- hydraulic pump
- measured
- self
- priming performance
- vacuum degree
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/02—Self-priming pumps
Abstract
The invention discloses a kind of detection methods for judging hydraulic pump self-priming performance, belong to pump performance detection technique field.The present invention first increases the oil suction resistance extremely setting oil suction resistance of hydraulic pump inlet to be measured, and detect the variable quantity of oil liquid discharge capacity in hydraulic pump to be measured during this, then the variable quantity and standard variation amount are compared, if variable quantity is less than or equal to standard variation amount, then hydraulic pump self-priming performance to be measured is qualified, otherwise unqualified；The present invention is by directly examining pumpage change indicator.Exact displacement variation numerical value can be provided to the producer and user, more can accurately reflect out the variation pumped under the conditions of certain vacuum degree, testing result is more accurate；And detection process is convenient and easy, exploitativeness is strong.
Description
Technical field
The present invention relates to pump performance detection technique field, more specifically to a kind of judgement hydraulic pump from absorption
The detection method of energy.
Background technique
Hydraulic pump is the power unit of hydraulic system, mechanical energy can be changed into pressure energy, be hydraulic system " heart ",
Pressure, flow are provided for entire hydraulic system.Performance quality, the service life length of pump often decide the maintenance frequency of hydraulic system
Secondary, therefore, the performance test of pump is just particularly important.An important indicator of the self-priming performance as pump, by the producer and
User's concern, and a kind of simple and easy, easy to operate self-priming performance test method is just particularly important.
In the practical operation of current standard self-priming performance test method, the aperture of inlet throttle valve need to be repeatedly adjusted, is remembered
Revolution speed, the flow under different opening are recorded, and is accordingly calculated, until meeting test discharge capacity declines certain value, can be recorded
The vacuum degree of lower pump intake, vacuum degree as defined in the vacuum degree and standard is compared.During the test, the variable of adjusting
Vacuum degree (oil suction resistance), rather than discharge capacity, discharge capacity are calculated by two parameters of measuring flow and revolving speed, it with
The conditions such as oil suction resistance change and change.It is known that a pump product, the producer and user are concerned with the entrance of pump
When oil suction resistance changes, which kind of influence can be generated on its output flow, that is, reality output discharge capacity has He Bianhua；The producer is also
Time and economic cost during concern test.A kind of suitable test method not only wants that displacement variation value can be examined
Core will also be readily able to realize, economical rationality.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to be directed to poor operability in existing hydraulic pump self-priming performance detection process and detect knot
Fruit is not intuitive, and testing result fails to embody pumpage the technical issues of setting the definite changing value under vacuum degree, provides one
The detection method of kind judgement hydraulic pump self-priming performance；The detection method is by increasing hydraulic pump inlet to be measured to setting oil suction resistance
Whether the variable quantity of power, detection oil liquid discharge capacity is less than or equal to standard variation amount, which facilitates implementation and result is quasi-
Really.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of detection method of judgement hydraulic pump self-priming performance of the invention first increases the oil suction resistance of hydraulic pump inlet to be measured
Power extremely setting oil suction resistance, and the variable quantity of hydraulic pump discharge to be measured during this is detected,
Above-mentioned displacement variation amount and standard displacement variation amount are compared, displacement variation amount is less than or equal to standard discharge capacity
Variable quantity, then hydraulic pump self-priming performance to be measured is qualified, otherwise unqualified.
Preferably, the specific steps are that:
Pump to be measured is set into rated speed and carries pressure surely, and sets initial for hydraulic pump inlet to be measured vacuum degree
Vacuum degree detects initial flow qv2,i；And acquire hydraulic pump revolving speed n to be measuredi, calculate initial displacement
Hydraulic pump inlet to be measured vacuum degree is increased into setting vacuum degree, detects terminal flow qv1,e1, acquisition at this time to
Survey hydraulic revolution speed nel, and calculate terminal discharge capacity
Calculated pump rate variable quantity is compared with discharge capacity standard variation amount, if being less than or equal to discharge capacity standard variation amount, to
The self-priming performance pass the test of hydraulic pump is surveyed, it is otherwise unqualified.
Preferably, after terminal discharge capacity is calculated, then calculated pump rate variable quantity:Δη'
For discharge capacity standard variation amount, if Δ ηe≤ Δ η ', the self-priming performance pass the test of hydraulic pump to be measured are otherwise unqualified.
Preferably, carrying pressure surely is unloaded pressure.
Preferably, initial depression 0.
Preferably, vacuum degree is set as 16kPa.
Preferably, discharge capacity standard variation amount Δ η '=1%.
Preferably, by reducing the aperture of hydraulic pump throttle valve to be measured, hydraulic pump inlet to be measured vacuum degree is increased to
Set vacuum degree.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
A kind of detection method of judgement hydraulic pump self-priming performance of the invention first increases the oil suction resistance of hydraulic pump inlet to be measured
Power extremely setting oil suction resistance, and the variable quantity of hydraulic pump discharge to be measured during this is detected, then the variable quantity and standard are become
Change amount compares, if variable quantity is less than or equal to standard variation amount, hydraulic pump self-priming performance to be measured is qualified, does not otherwise conform to
Lattice；The detection method directly examines pumpage change indicator, can provide to the producer and user in setting vacuum degree
Under exact displacement variation numerical value, more can accurately reflect out variation of pumpage under the conditions of certain vacuum degree, testing result is more
It is accurate；And detection process is convenient and easy, exploitativeness is strong.
Detailed description of the invention
Fig. 1 is a kind of flow diagram for the detection method for judging hydraulic pump self-priming performance of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；Moreover, be not between each embodiment it is relatively independent, according to
It needs can be combined with each other, to reach more preferably effect.Therefore, below to the embodiment of the present invention provided in the accompanying drawings
Detailed description is not intended to limit the range of claimed invention, but is merely representative of selected embodiment of the invention.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of detection method of judgement hydraulic pump self-priming performance of the present embodiment, by first increasing prepare liquid
The oil suction resistance of press pump entrance detects the variable quantity of oil liquid discharge capacity in hydraulic pump to be measured during this to setting oil suction resistance,
Then the variable quantity and standard variation amount are compared, if variable quantity is less than or equal to standard variation amount, hydraulic pump to be measured
Self-priming performance is qualified, otherwise unqualified.The detailed process of the present embodiment are as follows:
Testing staff first will be fully open by the throttle valve of hydraulic pump inlet to be measured, and rises to rated speed, imposes and determines load
Pressure, the present embodiment are to carry out under idle condition.The vacuum meter being arranged at this time from entrance records initial depression, the present embodiment
Middle initial depression is 0, i.e., when the pressure registration on vacuum meter is zero, the revolving speed n of hydraulic pump to be measured is recorded in detectioni, stream
Measure qv2,i；Then initial displacement is calculatedIt should be noted that revolving speed niTheoretically rated speed, but operated
Small-scale fluctuation, detection record revolving speed n can inevitably occur in journeyiIt is in order to which more accurate initial row can be calculated
Amount.
Then it is gradually reduced throttle valve opening, increases the oil suction resistance of hydraulic pump inlet to be measured to oil suction resistance is set, originally
In embodiment, increase the oil suction resistance of hydraulic pump inlet to be measured by way of increasing hydraulic pump inlet to be measured vacuum degree, it will
Hydraulic pump inlet to be measured vacuum degree increases to setting vacuum degree, and setting vacuum degree means setting oil suction resistance in the present embodiment
Power；Whether the vacuum meter for observing hydraulic pump inlet to be measured setting reaches setting vacuum degree, set in the present embodiment vacuum degree as
16kPa, i.e., when the pressure shown on vacuum meter is -0.0160MPa, the revolving speed n of hydraulic pump to be measured at this time is recorded in detectione1With
Terminal flow qv1,e1, it should be noted that revolving speed ne1Theoretically rated speed, but can inevitably occur in operating process small
The fluctuation of range, detection record revolving speed ne1It is in order to which more accurate terminal discharge capacity can be calculated；It is as follows to be computed formula:
Test discharge capacity:
Discharge capacity drop-out value:
If Δ ηe≤ Δ η ', the self-priming performance pass the test of hydraulic pump to be measured are otherwise unqualified；Discharge capacity mark in the present embodiment
Quasi- variation delta η '=1%.
In actual tests operation, testing crew measures unloaded discharge capacity first:Then gradually
Reduce inlet restriction valve opening, records revolving speed n when vacuum degree reaches 16kPa when that is, pump inlet pressure is -0.0160MPae1
=999.5r/min, flow qv1,e1=20L/23.02s, is computed and learns:
Test discharge capacity:
Displacement variation amount:
Δηe≤ Δ η ', so the hydraulic pump to be measured of the present embodiment is qualified.
Specific detection process data record is as shown in table 1:
1 embodiment of table, 1 data record sheet
Comparative example 1
The comparative example is by taking JB/T 7041-2006 " hydraulic gear pump " standard as an example, detection method are as follows: " rated speed,
Discharge capacity under unloaded pressure working condition, when measurement subject pump intake vacuum degree is zero.As benchmark, suction resistance is gradually increased,
Until measuring its vacuum degree when discharge capacity decline 1% ".
According to standard requirements, testing staff should be fully open by the throttle valve for being tested pump intake first, and will be by pump testing liter
To rated speed, under idle condition, be gradually reduced the aperture of throttle valve, increase the oil suction resistance of subject pump intake, observe into
The vacuum meter of mouth setting.When being tested pump inlet pressure is zero, the revolving speed n of pump is recordedi, flow qv2,i, calculate unloaded discharge capacityIt is gradually reduced the aperture of throttle valve, the oil suction resistance of increasing pump, while recording the revolving speed n of pumpe1, flow qv1,e1, meter
Calculate test discharge capacityWhen test discharge capacity decline 1%, that is, work as v2,e1=(1-1%) × v2,iWhen, it records at pump intake
Vacuum degree should be not less than 16kPa.If v2,e1≠ (1-1%) × v2,i, then the aperture of throttle valve is reduced or increased, to increase accordingly
Or reduce the oil suction resistance of pump, and record revolving speed n respectivelye2, ne3, ne4...nei, flow qv1,e2, qv1,e3, qv1,e4...qv1,ei,
And calculate corresponding test discharge capacity v2,e2, v2,e3, v2,e4...v2,ei, until v2,e1=(1-1%) × v2,iUntil, while recording pump
The vacuum degree of inlet should be not less than 16kPa.
According to detection method specified in standard, self-priming performance detection is carried out to by pump testing.Testing crew first will subject
Pump intake throttle valve is fully open, rises to rated speed, after stable operation for a period of time, gradually turns down entrance throttle, works as pump
Inlet vacuum list index is indicated at " 0 ", records inlet vacuum degree: 0.0000MPa, revolving speed n respectivelyi: 999.13r/
Min measures output flow, and: 20L/22.86s is computed and learns:
Flow qv2,i=52.49L/min；
Unloaded discharge capacity
Then testing staff is gradually reduced the aperture of throttle valve, while recording the data of each instrument and meter after operation, and
It is calculated, middle data 2 that see Table 2 for details to data 7.Testing crew discovery, when the 7th group of data are recorded, by the discharge capacity of pump testing
For drop-out value very close to as defined in standard 1% (data 7 during see Table 2 for details), continuation reduces throttle valve opening by a small margin, and records
Lower 8th group of data (data 8 during see Table 2 for details), while calculating subject pumpage drop-out value at this time is 1.12%, alreadys exceed mark
1% as defined in standard, throttle valve need to reversely be adjusted, increase aperture, while record data 9 (data 9 during see Table 2 for details), calculated
Learn that being tested pumpage drop-out value is 1.07%, continuation increases throttle valve opening by a small margin, and record data 10 (count during see Table 2 for details
It according to 10), is computed, being tested pumpage drop-out value at this time is 1.00%, has met wanting for the decline of discharge capacity specified in standard 1%
It asks, recording subject pump inlet pressure is -0.0190MPa, i.e., by pump testing under rated speed, unloaded pressure working condition, discharge capacity
When declining 1%, vacuum degree 19kPa.According to specified in standard " suction capacity is not less than 16kPa vacuum degree " requires, and determines
This is by pump testing " self-priming performance " qualification.
From the point of view of the data that table 2 records, in addition to data 1 be measure unloaded discharge capacity and must measured data, data 10 be test most
Outside whole the data obtained, other data 2 to data 8 are running test data, and in the process, testing crew needs to carry out not
Disconnected adjustment record, calculates, compares, and opens from operability, relatively cumbersome, and above-mentioned testing crew is to have to survey for many years
Even there is the case where adjusting repeatedly, if it is ordinary test personnel, be greatly likely to occur throttling in the expert engineer of examination experience
Valve adjusts repeatedly, can not also to be right up to 1% by the discharge capacity drop-out value of pump testing, or allow to just make by pump testing
Discharge capacity drop-out value be 1%, that also by repeatedly adjusting repeatedly.
2 comparative example of table, 1 data record
Comparative example 1 and embodiment 1 are compared, from the comparison of Tables 1 and 2, it is apparent that the detection method of embodiment 1
Operability is better than the detection method of comparative example 1, and embodiment 1 requires to reduce to the profile of testing staff, test operation letter
It is single, easy, even if ordinary test personnel, can also be quickly completed；And it is avoided in testing and repeatedly adjusts, records, calculating, comparing
Process, save the plenty of time.In addition while reducing separate unit test period, reduce personal services, the expenditure on power of test
Deng reducing production cost；Importantly, the detection method of embodiment 1 can directly examine pumpage change indicator,
Exact displacement variation numerical value is provided to the producer and user, more can accurately reflect out and pump discharge capacity under the conditions of certain vacuum degree
Changing value, as a result have more practicability.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
Claims (8)
1. a kind of detection method for judging hydraulic pump self-priming performance, which is characterized in that first increase the oil suction of hydraulic pump inlet to be measured
Resistance extremely setting oil suction resistance, and the variable quantity of hydraulic pump discharge to be measured during this is detected,
Above-mentioned displacement variation amount and standard displacement variation amount are compared, displacement variation amount is less than or equal to standard displacement variation
Amount, then hydraulic pump self-priming performance to be measured is qualified, otherwise unqualified.
2. a kind of detection method for judging hydraulic pump self-priming performance according to claim 1, which is characterized in that its specific step
Suddenly are as follows:
Pump to be measured is set into rated speed and carries pressure surely, and sets initial vacuum for hydraulic pump inlet to be measured vacuum degree
Degree detects initial flow qv2,i；And acquire hydraulic pump revolving speed n to be measuredi, calculate initial displacement
Hydraulic pump inlet to be measured vacuum degree is increased into setting vacuum degree, detects terminal flow qv1,e1, acquire prepare liquid at this time
Press pump revolving speed nel, and calculate terminal discharge capacity
Calculated pump rate variable quantity is compared with discharge capacity standard variation amount, if being less than or equal to discharge capacity standard variation amount, prepare liquid
The self-priming performance pass the test of press pump, it is otherwise unqualified.
3. a kind of detection method for judging hydraulic pump self-priming performance according to claim 2, which is characterized in that be calculated
After terminal discharge capacity, then calculated pump rate variable quantity:Δ η ' is discharge capacity standard variation amount, if Δ ηe
≤ Δ η ', the self-priming performance pass the test of hydraulic pump to be measured are otherwise unqualified.
4. a kind of detection method for judging hydraulic pump self-priming performance according to claim 2, which is characterized in that carry pressure surely
For unloaded pressure.
5. a kind of detection method for judging hydraulic pump self-priming performance according to claim 2, which is characterized in that initial vacuum
Degree is 0.
6. a kind of detection method for judging hydraulic pump self-priming performance according to claim 2, which is characterized in that setting vacuum
Degree is 16kPa.
7. a kind of detection method for judging hydraulic pump self-priming performance according to claim 2, which is characterized in that discharge capacity standard
Variation delta η '=1%.
8. a kind of described in any item detection methods for judging hydraulic pump self-priming performance, feature exist according to claim 1~7
In by reducing the aperture of hydraulic pump throttle valve to be measured, hydraulic pump inlet to be measured vacuum degree is increased to setting vacuum degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910514367.8A CN110145473B (en) | 2019-06-14 | 2019-06-14 | Detection method for judging self-suction performance of hydraulic pump |
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| CN201910514367.8A CN110145473B (en) | 2019-06-14 | 2019-06-14 | Detection method for judging self-suction performance of hydraulic pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793878A (en) * | 2019-10-24 | 2020-02-14 | 江门联福广科新材料科技有限公司 | Method for testing performance of scale-inhibiting filter material |
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|---|---|---|---|---|
| EP0233411A1 (en) * | 1985-12-20 | 1987-08-26 | Ngk Insulators, Ltd. | Leakless pump |
| CN102777370A (en) * | 2012-01-11 | 2012-11-14 | 福州大学 | Realization method of LabVIEW-based high-pressure pump performance testing system |
| CN106438580A (en) * | 2016-11-30 | 2017-02-22 | 宿州市金河矿山设备有限公司 | Hydraulic motor overhaul testing method |
| CN108916020A (en) * | 2018-07-05 | 2018-11-30 | 北京联合大学 | Hydraulic pump pressure maintaining automatic detection system |
| CN109630394A (en) * | 2019-01-24 | 2019-04-16 | 重庆大学 | A kind of Hydraulic Experimental Platform system and Hydraulic Experimental Platform |
-
2019
- 2019-06-14 CN CN201910514367.8A patent/CN110145473B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0233411A1 (en) * | 1985-12-20 | 1987-08-26 | Ngk Insulators, Ltd. | Leakless pump |
| CN102777370A (en) * | 2012-01-11 | 2012-11-14 | 福州大学 | Realization method of LabVIEW-based high-pressure pump performance testing system |
| CN106438580A (en) * | 2016-11-30 | 2017-02-22 | 宿州市金河矿山设备有限公司 | Hydraulic motor overhaul testing method |
| CN108916020A (en) * | 2018-07-05 | 2018-11-30 | 北京联合大学 | Hydraulic pump pressure maintaining automatic detection system |
| CN109630394A (en) * | 2019-01-24 | 2019-04-16 | 重庆大学 | A kind of Hydraulic Experimental Platform system and Hydraulic Experimental Platform |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793878A (en) * | 2019-10-24 | 2020-02-14 | 江门联福广科新材料科技有限公司 | Method for testing performance of scale-inhibiting filter material |
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| CN110145473B (en) | 2020-06-05 |
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