CN201621114U - Pressure ascending and descending device of constant pressure variable displacement pump - Google Patents
Pressure ascending and descending device of constant pressure variable displacement pump Download PDFInfo
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- CN201621114U CN201621114U CN2010201340205U CN201020134020U CN201621114U CN 201621114 U CN201621114 U CN 201621114U CN 2010201340205 U CN2010201340205 U CN 2010201340205U CN 201020134020 U CN201020134020 U CN 201020134020U CN 201621114 U CN201621114 U CN 201621114U
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- variable displacement
- displacement pump
- constant pressure
- pressure variable
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Abstract
The utility model relates to a pressure ascending and descending device of a constant pressure variable displacement pump, which is applied for a controllable seismic source in oil seismic exploration. A liquid outlet of a slippage pump is respectively connected with the inlets of a constant pressure variable displacement pump A and a constant pressure variable displacement pump B, a liquid outlet of the slippage pump is provided with a pipeline connected with a pipeline of a load low-pressure end, and the pipeline of the load low-pressure end is connected with a low-pressure overflow valve. The liquid outlets of the constant pressure variable displacement pump A and the constant pressure variable displacement pump B are respectively connected with high-pressure load pipelines. A liquid control port of the constant pressure variable displacement pump A is provided with a pipeline which is connected with a liquid inlet of the stacked overflow valve, and the liquid control port of the constant pressure variable displacement pump B is provided with a pipeline connected with the liquid inlet of the stacked overflow valve. The pipeline between the liquid control port of the constant pressure variable displacement pump B and the liquid inlet of the stacked overflow valve is connected with an energy accumulator. The utility model has the advantages that the constant pressure variable displacement pump gradually ascends the pressure automatically via the delay action of a small-volume energy accumulator so as to improve the safety and reliability of the pressure ascending system of the controllable seismic source; and additionally, the structure is compact, and the operation is convenient.
Description
Technical field
The utility model relates to oil seismic exploration equipment technology field, and particularly the seismic prospecting controlled source is a kind of constant pressure variable displacement pump buck device of controlled source.
Background technique
The vibratory hydraulic system of controlled source adopts the constant-pressure variable oil hydraulic pump as power source, drives hydraulic efficiency servo-valve and drives load movement realization vibration.Controlled source when work, at first vibratory hydraulic system is boosted, make vibration system pressure reach rated working pressure, this moment, the constant-pressure variable oil hydraulic pump was in the constant voltage working state of awaiting orders.
At present, controlled source adopts the two constant pressure variable displacement pumps of hydraulic control interflow to boost.Consult Fig. 1.Figure 1 shows that the original state of constant-pressure variable pump work, the hydraulic oil that constant pressure variable displacement pump 5,6 hydraulic control mouths come out is got back to fuel tank through the selector valve 8 that boosts, and the pressure of load this moment high voltage terminal is approximately 2.5～3.5MPa.Slippage pump 1 output hydraulic oil is kept the pressure (approximately 1MPa is set by low pressure relief valve 2) of two constant pressure variable displacement pump entrance points and the thermal cycle of vibratory hydraulic system to the load low voltage terminal; The hydraulic oil of suction booster output is got back to the load low voltage terminal through the supercharging selector valve, keeps the pressure of two constant pressure variable displacement pump entrance points and the thermal cycle of vibratory hydraulic system.
The two-stage boost operations can be realized in the two constant pressure variable displacement pumps of existing hydraulic control interflow, and first class boost is used for the controlled source assist control of travelling, and secondary boosts and is used for the vibration of controlled source.
First class boost operation: operation supercharging selector valve electromagnet, suction booster output hydraulic oil raises the pressure of load high voltage terminal, observe high pressure gauge, when pressure reaches or near setting pressure (about 16MPa, set by c valve in the overlapping relief valve 7) time, operate and boost selector valve 8 electromagnet b and unclamp supercharging selector valve electromagnet a simultaneously, the start working pressure that makes the load high voltage terminal of constant pressure variable displacement pump 6 reaches the pressure that first class boost is set, the swash plate of constant pressure variable displacement pump 6 pendulum is got back to very small angle position (being used to compensate high-pressure leakage) afterwards, is in the constant voltage working state of awaiting orders.
Secondary boost operations: operation supercharging selector valve electromagnet a, suction booster output hydraulic oil raises the pressure of load high voltage terminal, observe high pressure gauge, when pressure reaches or (about 25MPa during near rated pressure, set by d valve in the overlapping relief valve 7), operate and boost selector valve 8 electromagnet a and unclamp supercharging selector valve electromagnet a simultaneously, constant pressure variable displacement pump 5,6 start working makes the pressure of load high voltage terminal reach the pressure that secondary boosts and sets, constant pressure variable displacement pump 5 afterwards, 6 swash plate pendulum is got back to very small angle position (being used to compensate high-pressure leakage), is in the constant voltage working state of awaiting orders.
In the process of boosting, require the pressure (reading of low-pressure meter 3) of load low voltage terminal must not be lower than 0.7MPa, prevent that the filler opening suction sky of constant pressure variable displacement pump 5,6 from causing pump to damage.
In use there are some problems in the two constant pressure variable displacement pumps of existing hydraulic control interflow, mainly shows as:
1, when from the first class boost state transformation when secondary boosts the position, the suction booster job insecurity sometimes needs to boost inconvenient operation after the step-down more again.
2, because boost pressure is higher, be up to 25MPa, the working life of suction booster (gear pump) is shorter, and reliability is low.
The model utility content
The purpose of this utility model is: a kind of constant pressure variable displacement pump buck device is provided, improves the reliability of controlled source boost operations system.
The technical solution adopted in the utility model is: constant pressure variable displacement pump buck device, mainly by slippage pump, low pressure relief valve, low-pressure meter, high pressure gauge, constant pressure variable displacement pump A, constant pressure variable displacement pump B, the overlapping relief valve, selector valve and accumulator composition boosts, the inlet of slippage pump connects fuel tank, the liquid outlet of slippage pump is connected with the inlet of constant pressure variable displacement pump B with constant pressure variable displacement pump A respectively, the liquid outlet of slippage pump has pipeline to be connected with load low voltage terminal pipeline, be connected with low-pressure meter on the load low voltage terminal pipeline, be connected with low pressure relief valve on the load low voltage terminal pipeline, the liquid outlet of low pressure relief valve connects fuel tank.It is characterized in that: the liquid outlet of constant pressure variable displacement pump A and constant pressure variable displacement pump B is connected with one-way valve respectively, and is connected with the high-voltage load pipeline.On the high-voltage load pipeline, be connected with high pressure gauge.
The hydraulic control mouth of constant pressure variable displacement pump A has pipeline to connect the liquid entering hole A of overlapping relief valve, at the hydraulic control mouth end of constant pressure variable displacement pump A an one-way valve is arranged, and this one-way valve only allows the control oil one-way flow outward of the hydraulic control mouth of constant pressure variable displacement pump A; The hydraulic control mouth of constant pressure variable displacement pump B has pipeline to connect the liquid entering hole P of overlapping relief valve, at the hydraulic control mouth end of constant pressure variable displacement pump B an one-way valve is arranged, and this one-way valve only allows the control oil one-way flow outward of the hydraulic control mouth of constant pressure variable displacement pump B.The overlapping relief valve is fixedlyed connected between the selector valve with boosting, and those skilled in the art know the overlapping relief valve and the oil circuit annexation between the selector valve of boosting.
The liquid outlet T of overlapping relief valve has pipeline to connect fuel tank.To the pipeline between the overlapping relief valve liquid entering hole P, be connected with accumulator at constant pressure variable displacement pump B liquid outlet.
The working principle of constant pressure variable displacement pump buck device: consult Fig. 2.Fig. 2 is the original state of constant-pressure variable pump work, and the hydraulic oil that constant pressure variable displacement pump A 5, constant pressure variable displacement pump B6 hydraulic control mouth come out is got back to fuel tank through the overlapping relief valve 7 and the selector valve 8 that boosts, and the pressure of load this moment high voltage terminal is approximately 2.5～3.5MPa.Slippage pump 1 output hydraulic oil is kept the pressure (approximately 1MPa is controlled by low pressure relief valve 3) of two constant pressure variable displacement pump entrance points and the thermal cycle of vibratory hydraulic system to the load low voltage terminal.
First class boost operation: operate the selector valve 8 electromagnet b that boost, the start working pressure that makes the load high voltage terminal of constant pressure variable displacement pump 6 reaches the pressure that first class boost sets (about 16MPa, set by c valve in the overlapping relief valve 7), the swash plate of constant pressure variable displacement pump 6 pendulum is got back to very small angle position (being used to compensate high-pressure leakage) afterwards, is in the constant voltage working state of awaiting orders.
Secondary boost operations: at first finish the first class boost operation, operate the selector valve 8 electromagnet a that boost then, constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 start working and make the pressure in the load high voltage terminal pipeline reach pressure (about 25MPa that secondary boosts and sets, set by d valve in the overlapping relief valve 7), the swash plate of constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 pendulum is got back to very small angle position (being used to compensate high-pressure leakage) afterwards, is in the constant voltage working state of awaiting orders.
The hydraulic fluid flow rate that constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 hydraulic control mouth come out is very little, about 3-4L/min, the compression energy storage effect of the accumulator 9 by a little volume, the pressure that prolongs constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 hydraulic control mouth raises the time, make the corresponding prolongation of rising time of constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 delivery pressure, avoid the load high voltage terminal to produce compression shock, it is empty to avoid the load low voltage terminal to inhale simultaneously.
The beneficial effects of the utility model: the utility model constant pressure variable displacement pump buck device, by the delay action of a little volume accumulator, constant pressure variable displacement pump (plunger pump) is boosted automatically gradually, can improve the safety reliability of controlled source boost operations system.Compact structure is easy to operate in addition.
Description of drawings
Fig. 1 is that the two constant pressure variable displacement pumps of existing hydraulic control collaborate to boost schematic diagram
Fig. 2 is the utility model constant pressure variable displacement pump buck apparatus structure schematic representation.
Among the figure, 1. slippage pump, 2. low pressure relief valve, 3. low-pressure meter, 4. high pressure gauge, 5. constant pressure variable displacement pump A, 6. constant pressure variable displacement pump B, 7. overlapping relief valve, selector valve, 9. accumulator 8. boost.
Embodiment
Embodiment 1: with a constant pressure variable displacement pump buck device is example, and the utility model is described in further detail.Slippage pump 1, low pressure relief valve 2, low-pressure meter 3, high pressure gauge 4, constant pressure variable displacement pump A 5, constant pressure variable displacement pump B 6, overlapping relief valve 7, the selector valve 8 that boosts, accumulator 9.
Consult Fig. 2.The utility model constant pressure variable displacement pump buck device mainly is made up of slippage pump 1, low pressure relief valve 2, low-pressure meter 3, high pressure gauge 4, constant pressure variable displacement pump A5, constant pressure variable displacement pump B6, overlapping relief valve 7, boost selector valve 8 and accumulator 9.
The model of slippage pump 1 is MHP330A278 (32.3 milliliters/commentaries on classics of discharge capacity), the inlet of slippage pump 1 connects fuel tank, the liquid outlet of slippage pump 1 is connected with the inlet of constant pressure variable displacement pump B6 with constant pressure variable displacement pump A5 respectively, and what constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 adopted is the plunger pump of A11VO130DRL (130 milliliters/commentaries on classics of discharge capacity) model.The liquid outlet of slippage pump 1 has pipeline to be connected with load low voltage terminal pipeline, be connected with low-pressure meter 3 (meaning of low-pressure meter 3 is the pressure gauges on the low-pressure line) on the load low voltage terminal pipeline, be connected with low pressure relief valve 2 on the load low voltage terminal pipeline, the model of low pressure relief valve 2 is DB20A (20 millimeters of latus rectums).The liquid outlet of low pressure relief valve 2 connects fuel tank.
The liquid outlet of constant pressure variable displacement pump A5 and constant pressure variable displacement pump B6 is connected with an one-way valve respectively, and is connected with the high-voltage load pipeline.On the high-voltage load pipeline, be connected with high pressure gauge 4.
The hydraulic control mouth of constant pressure variable displacement pump A5 has pipeline to connect the liquid entering hole A of overlapping relief valve 7, and the hydraulic control mouth of constant pressure variable displacement pump B6 has pipeline to connect the liquid entering hole P of overlapping relief valve 7.Overlapping relief valve 7 is fixedlyed connected between the selector valve 8 with boosting.The model of overlapping relief valve 7 is Z2DB6VC (6 millimeters of latus rectums), and the model of the selector valve 8 that boosts is SWH-G02-C3 (6 millimeters of latus rectums).
The liquid outlet T of overlapping relief valve 7 has pipeline to connect fuel tank.Be connected with the accumulator 9 of one 1 liter capacity to the pipeline between the overlapping relief valve 7 liquid entering hole P at constant pressure variable displacement pump B6 liquid outlet.
Claims (1)
1. constant pressure variable displacement pump buck device, mainly by slippage pump (1), low pressure relief valve (2), low-pressure meter (3), high pressure gauge (4), constant pressure variable displacement pump A (5), constant pressure variable displacement pump B (6), overlapping relief valve (7), selector valve (8) and accumulator (9) composition boosts, the inlet of slippage pump (1) connects fuel tank, the liquid outlet of slippage pump (1) is connected with the inlet of constant pressure variable displacement pump B (6) with constant pressure variable displacement pump A (5) respectively, the liquid outlet of slippage pump (1) has pipeline to be connected with load low voltage terminal pipeline, be connected with low-pressure meter (3) on the load low voltage terminal pipeline, be connected with low pressure relief valve (2) on the load low voltage terminal pipeline, the liquid outlet of low pressure relief valve (2) connects fuel tank; It is characterized in that: the liquid outlet of constant pressure variable displacement pump A (5) and constant pressure variable displacement pump B (6) is connected with one-way valve respectively, and is connected with the high-voltage load pipeline, is connected with high pressure gauge (4) on the high-voltage load pipeline;
The hydraulic control mouth of constant pressure variable displacement pump A (5) has pipeline to connect the liquid entering hole (A) of overlapping relief valve (7), at the hydraulic control mouth end of constant pressure variable displacement pump A (5) one-way valve is arranged; The hydraulic control mouth of constant pressure variable displacement pump B (6) has pipeline to connect the liquid entering hole (P) of overlapping relief valve (7), at the hydraulic control mouth end of constant pressure variable displacement pump B (6) one-way valve is arranged, and fixedlys connected between overlapping relief valve (7) and the selector valve that boosts (8); The liquid outlet (T) of overlapping relief valve (7) has pipeline to connect fuel tank, is connected with accumulator (9) at constant pressure variable displacement pump B (6) hydraulic control mouth to the pipeline between overlapping relief valve (7) liquid entering hole (P).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201340205U CN201621114U (en) | 2010-03-18 | 2010-03-18 | Pressure ascending and descending device of constant pressure variable displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201340205U CN201621114U (en) | 2010-03-18 | 2010-03-18 | Pressure ascending and descending device of constant pressure variable displacement pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621114U true CN201621114U (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201340205U Expired - Fee Related CN201621114U (en) | 2010-03-18 | 2010-03-18 | Pressure ascending and descending device of constant pressure variable displacement pump |
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| CN (1) | CN201621114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883574A (en) * | 2012-12-20 | 2014-06-25 | 国家核电技术有限公司 | Hydraulic multipoint synchronous control system |
-
2010
- 2010-03-18 CN CN2010201340205U patent/CN201621114U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883574A (en) * | 2012-12-20 | 2014-06-25 | 国家核电技术有限公司 | Hydraulic multipoint synchronous control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20160318 |
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| CF01 | Termination of patent right due to non-payment of annual fee |