CN214837435U - Supercharger of pulse test bed - Google Patents
Supercharger of pulse test bed Download PDFInfo
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- CN214837435U CN214837435U CN202120298293.1U CN202120298293U CN214837435U CN 214837435 U CN214837435 U CN 214837435U CN 202120298293 U CN202120298293 U CN 202120298293U CN 214837435 U CN214837435 U CN 214837435U
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Abstract
The utility model relates to a booster of pulse test bench relates to high-pressure hose nipple connecting piece's pressure test technical field, and the booster of having solved among the prior art is because there is an off-set oil inlet, and the piston initial velocity is slower to can produce the yawing force to the piston rod of booster, the not good technical problem of pressure waveform of pressure sensor output. The hydraulic cylinder is technically characterized by comprising a normal-pressure cylinder body and a high-pressure cylinder body, wherein the high-pressure cylinder body is arranged at one end of the normal-pressure cylinder body and is coaxial with the normal-pressure cylinder body, and the normal-pressure cylinder body is provided with a first oil port and a second oil port; the piston is in sliding fit with the inner cavities of the normal-pressure cylinder body and the high-pressure cylinder body; one end of the normal-pressure cylinder body is also provided with a one-way oil balancing structure which is used for balancing acting force on the piston and increasing oil inlet amount, and the one-way oil balancing structure is connected with the first oil port in parallel. The method has the advantages that the initial oil inlet amount of the supercharger can be increased, and the initial speed of the piston is improved.
Description
Technical Field
The utility model relates to a pressure test technical field of high pressure hose nipple connecting piece, in particular to booster of pulse test bench.
Background
The fatigue pressure test of the high-pressure hose requires that the pressure of an oil pipe of the tested pipe is increased to 1.5 times of the working pressure of the tested pipe at the frequency of 0.5Hz to 1.25Hz, the operation is continued until the pipe is burst, and the fatigue life of the pipe is tested in a quadratic method. Because the working pressure of the existing large-flow hydraulic pump is 35MPa at most, the requirement of the maximum pressure of 100MPa of a test pipe fitting cannot be met, a supercharger needs to be additionally arranged between a pressure oil source and an output of equipment, and the method is used for improving the output pressure value to finish the test work of the pipe fitting;
the booster of prior art kind is because there is an offset oil inlet, and the piston initial velocity is slower to can produce the yawing force to the piston rod of booster, the pressure waveform of pressure sensor output is not good.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the booster among the prior art because there is an off-set oil inlet, the piston initial velocity is slower to can produce the yawing force to the piston rod of booster, the not good technical problem of pressure waveform of pressure sensor output provides a pulse test bench's booster.
In order to solve the technical problem, the technical scheme of the utility model is specifically as follows:
a booster for a pulse test stand, comprising:
the high-pressure oil cylinder is mounted at one end of the normal-pressure cylinder and is coaxial with the normal-pressure cylinder, and the normal-pressure cylinder is provided with a first oil port and a second oil port;
the piston is in sliding fit with the inner cavities of the normal-pressure cylinder body and the high-pressure cylinder body;
one end of the normal-pressure cylinder body is also provided with a one-way oil balancing structure which is used for balancing acting force on the piston and increasing oil inlet amount, and the one-way oil balancing structure is connected with the first oil port in parallel.
Further, the atmospheric cylinder includes:
the bottom of the normal-pressure cylinder barrel is provided with a second oil port;
the normal pressure end cover is fixedly arranged at one end of the normal pressure cylinder barrel, and a first oil port is formed in the normal pressure end cover.
Furthermore, one end of the high-pressure cylinder body is fixedly connected with the bottom end face of the normal-pressure cylinder barrel, the other end of the high-pressure cylinder body is provided with a high-pressure oil outlet, and the high-pressure oil outlet is communicated with a test pipeline.
Furthermore, the piston comprises a first end, a second end and a third end which are sequentially arranged, the first end and the second end of the piston are positioned in the normal pressure cylinder barrel and are in sliding fit with an inner cavity of the normal pressure cylinder barrel, and the third end part of the piston is positioned in the high pressure cylinder body and is in sliding fit with an inner cavity of the high pressure cylinder barrel; the second end of the piston is located between the first oil port and the second oil port, a cavity between the second end of the piston and the first oil port is a first cavity, a cavity between the second end of the piston and the second oil port is a second cavity, a cavity between the third end of the piston and the high-pressure cylinder body is a high-pressure cavity, and the high-pressure cavity is communicated with the high-pressure oil outlet.
Further, the normal pressure end cover is provided with a first buffer cavity, the diameter of the first buffer cavity is larger than 1.5mm of the diameter of the first end of the piston, and a second buffer cavity is arranged between the end part of the normal pressure end cover and the second end of the piston.
Further, the one-way oil-balancing structure comprises:
the tee joint is connected with the oil inlet pipeline and the first oil port;
the oil inlet end of the one-way valve is communicated with a bypass of the tee joint;
the third hydraulic fluid port, the third hydraulic fluid port sets up on the ordinary pressure end cover, the one end of third hydraulic fluid port and the play oil end intercommunication of check valve, the other end of third hydraulic fluid port with second cushion chamber intercommunication, the ordinary pressure end cover is in the terminal surface of second cushion chamber is equipped with the oil equalizing groove, the oil equalizing groove is the ring groove, the ring groove with the other end intercommunication of third hydraulic fluid port.
The utility model discloses following beneficial effect has:
the utility model discloses a booster of pulse test bed, through setting up one-way oil-equalizing structure, one-way oil-equalizing structure connects in parallel with first hydraulic fluid port, can increase the initial oil input of booster, improve the piston initial velocity; meanwhile, the one-way oil-equalizing structure can also evenly distribute pressure oil entering the supercharger, so that the piston is stressed evenly, the influence of lateral force is avoided when the piston initially moves, and the pressure waveform output by the pressure sensor is good; because of the one-way oil inlet, when the piston returns, the pressure oil can only return from the first oil port and cannot return from the one-way oil balancing structure, the effect of buffering the piston can be achieved, and the safety and the reliability of the supercharger are guaranteed.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a supercharger of a pulse test bed according to the present invention;
the reference numerals in the figures denote:
1. a one-way oil-balancing structure; 101. a tee joint; 102. a one-way valve; 103. a third oil port; 104. an oil equalizing groove; 2. a normal pressure cylinder body; 201. a normal pressure cylinder barrel; 202. a normal pressure end cover; 203. a first oil port; 204. a second oil port; 205. a first buffer chamber; 206. a second buffer chamber; 207. a second cavity; 3. a piston; 301. a first end; 302. a second end; 303. a third end; 4. a high pressure cylinder; 401. a high pressure chamber; 402. and a high-pressure oil outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a supercharger of a pulse test bed includes:
the hydraulic cylinder comprises a normal pressure cylinder body 2 and a high pressure cylinder body 4, wherein the high pressure cylinder body 4 is installed at one end of the normal pressure cylinder body 2 and is coaxial with the normal pressure cylinder body 2, and the normal pressure cylinder body 2 is provided with a first oil port 203 and a second oil port 204;
the piston 3 is in sliding fit with the inner cavities of the normal pressure cylinder body 2 and the high pressure cylinder body 2;
one end of the normal pressure cylinder body 2 is also provided with a one-way oil-balancing structure 4 which is used for uniformly applying force to the piston 3 and increasing the oil inlet amount, and the one-way oil-balancing structure 4 is connected with the first oil port 203 in parallel.
Specifically, by arranging the one-way oil balancing structure 4, the one-way oil balancing structure 4 is connected with the first oil port 203 in parallel, and the two oil inlets can increase the initial oil inlet amount of the supercharger, improve the initial speed of the piston 3 and meet the test requirements; meanwhile, the one-way oil equalizing structure 4 can also evenly distribute pressure oil entering the supercharger, so that the end part of the piston 3 is evenly stressed, the piston 3 does not have the influence of lateral force when initially moving, the pressure waveform output by the pressure sensor is good, and the normal service life of a sealing ring between the piston 3 and the normal-pressure cylinder body 2 is also ensured; and, one-way oil feed structure 4 is one-way oil feed, and when piston 3 return stroke, pressure oil can only be followed first hydraulic fluid port 203 and returned, and can't follow one-way oil feed structure 4 oil return, can play the effect to piston 3 buffering, prevents that the tip of piston 3 from taking place to collide with the tip of ordinary pressure cylinder body 2, has guaranteed the safe and reliable of booster.
The atmospheric cylinder 2 includes:
the bottom of the normal-pressure cylinder barrel 201 is provided with a second oil port 204;
the normal pressure end cover 202 is fixedly arranged at one end of the normal pressure cylinder barrel 201, and the normal pressure end cover 202 is provided with a first oil port 203.
One end of the high-pressure cylinder body 4 is fixedly connected with the bottom end face of the normal-pressure cylinder barrel 201, the other end of the high-pressure cylinder body 4 is provided with a high-pressure oil outlet 402, and the high-pressure oil outlet 402 is communicated with a test pipeline.
Specifically, the normal-pressure cylinder barrel 201, the normal-pressure end cover 202 and the piston 3 form a hydraulic oil cylinder, and the piston 3 can be controlled to move back and forth by using oil feeding and returning of the first oil port 203 and the second oil port 204, so that the piston 3 moves back and forth according to the frequency required by the test; as shown in FIG. 1, the sectional areas of the pistons 3 are different, when the piston 3 moves rightwards, the end part of the piston 3 in the high-pressure cylinder 4 and the inner cavity of the high-pressure cylinder 4 generate high-pressure oil, and the high-pressure oil enters a test pipeline from a high-pressure oil outlet 402 to test the tested pipeline.
The piston 3 comprises a first end 301, a second end 302 and a third end 303 which are sequentially arranged, the first end 301 and the second end 302 of the piston 3 are positioned in the normal pressure cylinder 201 and are in sliding fit with an inner cavity of the normal pressure cylinder 201, and the third end 303 of the piston 3 is partially positioned in the high pressure cylinder 4 and is in sliding fit with an inner cavity of the high pressure cylinder 4; the second end 302 of the piston 3 is located between the first oil port 203 and the second oil port 204, a cavity between the second end 302 of the piston 3 and the first oil port 203 is a first cavity, a cavity between the second end 302 of the piston 3 and the second oil port 204 is a second cavity 207, a cavity between the third end 303 of the piston 3 and the high-pressure cylinder 4 is a high-pressure cavity 401, and the high-pressure cavity 401 is communicated with the high-pressure oil outlet 402.
Specifically, the diameters of the first end 301, the second end 302 and the third end 303 are different, the diameter of the second end 302 is the largest, the first end 301, the second end 302 and the third end 303 are respectively in sealing fit with the normal-pressure cylinder 201 and the high-pressure cylinder 4, so that independent operation of the first cavity and the second cavity 207 is guaranteed, oil inlet and oil return of the first cavity and the second cavity 207 can be controlled by using an external electromagnetic valve, the piston 3 moves back and forth according to the frequency required by the test, when the piston 3 moves right, hydraulic oil in the high-pressure cavity 401 is compressed to generate high-pressure oil, the high-pressure oil enters the test pipeline from the high-pressure oil outlet 402, and the tested pipeline is tested.
The normal pressure end cover 202 has a first buffer cavity 205, the diameter of the first buffer cavity 205 is larger than 1.5mm of the diameter of the first end 301 of the piston 3, and a second buffer cavity 206 is arranged between the end of the normal pressure end cover 202 and the second end 302 of the piston 3.
Specifically, when the piston 3 returns, that is, as shown in fig. 1, when the piston 3 moves leftward, the hydraulic oil in the second buffer chamber 206 can only enter the first buffer chamber 205 through the gap between the first end 301 of the piston 3 and the inner diameter of the first buffer chamber 205, and then returns from the first oil port 203, so that the speed of the return stroke of the piston 3 is greatly delayed, the resistance of the return stroke is increased, the purpose of buffering the piston 3 is finally achieved, the piston 3 is prevented from colliding with the normal-pressure end cover 202, and the normal service life of the supercharger is ensured; the diameter of the first buffer cavity 205 is larger than 1.5mm of the diameter of the first end 301 of the piston 3, and the gap is small, so that the purpose of delaying the speed of hydraulic oil in the second buffer cavity 206 entering the first buffer cavity 205 can be achieved, and the buffer effect on the piston 3 is finally realized.
The unidirectional oil-balancing structure 4 comprises:
the tee joint 101, wherein the tee joint 101 is connected with an oil inlet pipeline and a first oil port 203;
the oil inlet end of the one-way valve 102 is communicated with a bypass of the tee 101;
the third oil port 103 is arranged on the normal-pressure end cover 202, one end of the third oil port 103 is communicated with the oil outlet end of the check valve 102, the other end of the third oil port 103 is communicated with the second buffer cavity 206, the normal-pressure end cover 202 is located on the end face of the second buffer cavity 206 and is provided with an oil equalizing groove 104, the oil equalizing groove 104 is an annular groove, and the annular groove is communicated with the other end of the third oil port 103.
Specifically, when oil is fed into the first cavity, pressure oil of an external oil source is divided into two paths through the tee joint 101 from the oil inlet pipeline, the first path enters the first buffer cavity 205 from the first oil port 203, the pressure oil in the first buffer cavity 205 provides pressure for the end part of the first end 301 of the piston 3, the second path enters the second buffer cavity 206 from the check valve 102 through the third oil port 103, the pressure oil in the second buffer cavity 206 provides pressure for the end part of the second end 302 of the piston 3, and the two paths of oil feeding increase the oil feeding amount, so that the initial moving speed of the piston 3 is increased, and the test requirements are met; when the piston 3 is in an initial state of the end part, that is, when the end part of the second end 302 is attached to the normal pressure end cover 202, the second path of pressure oil enters from the third oil port 103, and then the pressure oil is quickly filled in the oil equalizing groove 104, so that the pressure oil can uniformly act on the end surface of the second end 302, the piston 3 can smoothly move, the problem that the piston 3 generates lateral force to act on one point of the second end 302 of the piston 3 due to the fact that only one oil port supplies oil, and further the sealing ring is lost is solved, meanwhile, the lateral force influence is avoided, and the pressure waveform output by the pressure sensor is good; when the piston 3 returns, that is, as shown in fig. 1, when the piston 3 moves leftward, due to the arrangement of the check valve 102, hydraulic oil in the second buffer cavity 206 can only enter the first buffer cavity 205 through a gap between the first end 301 of the piston 3 and the inner diameter of the first buffer cavity 205, and then the hydraulic oil returns from the first oil port 203, the hydraulic oil in the second buffer cavity 206 cannot flow back through the check valve 102 through the third oil port 103, so that the return speed of the piston 3 is greatly delayed, the return resistance is increased, the purpose of buffering the piston 3 is finally achieved, the collision between the piston 3 and the normal-pressure end cover 202 is prevented, and the normal service life of the supercharger is ensured.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (6)
1. A booster for a pulse test stand, comprising:
the high-pressure oil cylinder is mounted at one end of the normal-pressure cylinder and is coaxial with the normal-pressure cylinder, and the normal-pressure cylinder is provided with a first oil port and a second oil port;
the piston is in sliding fit with the inner cavities of the normal-pressure cylinder body and the high-pressure cylinder body;
one end of the normal-pressure cylinder body is also provided with a one-way oil balancing structure which is used for balancing acting force on the piston and increasing oil inlet amount, and the one-way oil balancing structure is connected with the first oil port in parallel.
2. The pulse test stand booster of claim 1, wherein the atmospheric cylinder block comprises:
the bottom of the normal-pressure cylinder barrel is provided with a second oil port;
the normal pressure end cover is fixedly arranged at one end of the normal pressure cylinder barrel, and a first oil port is formed in the normal pressure end cover.
3. The supercharger of claim 2, wherein one end of the high-pressure cylinder body is fixedly connected with the bottom end face of the normal-pressure cylinder barrel, the other end of the high-pressure cylinder body is provided with a high-pressure oil outlet, and the high-pressure oil outlet is communicated with a test pipeline.
4. The supercharger of claim 3, wherein the piston comprises a first end, a second end and a third end which are sequentially arranged, the first end and the second end of the piston are located in the normal pressure cylinder and are in sliding fit with an inner cavity of the normal pressure cylinder, and the third end of the piston is partially located in the high pressure cylinder and is in sliding fit with the inner cavity of the high pressure cylinder; the second end of the piston is located between the first oil port and the second oil port, a cavity between the second end of the piston and the first oil port is a first cavity, a cavity between the second end of the piston and the second oil port is a second cavity, a cavity between the third end of the piston and the high-pressure cylinder body is a high-pressure cavity, and the high-pressure cavity is communicated with the high-pressure oil outlet.
5. The pulse test stand booster of claim 4, wherein the atmospheric end cap has a first buffer cavity having a diameter greater than 1.5mm of a diameter of the first end of the piston, and a second buffer cavity is between an end of the atmospheric end cap and the second end of the piston.
6. The pulse test stand booster of claim 5, wherein the one-way oil-balancing structure comprises:
the tee joint is connected with the oil inlet pipeline and the first oil port;
the oil inlet end of the one-way valve is communicated with a bypass of the tee joint;
the third hydraulic fluid port, the third hydraulic fluid port sets up on the ordinary pressure end cover, the one end of third hydraulic fluid port and the play oil end intercommunication of check valve, the other end of third hydraulic fluid port with second cushion chamber intercommunication, the ordinary pressure end cover is in the terminal surface of second cushion chamber is equipped with the oil equalizing groove, the oil equalizing groove is the ring groove, the ring groove with the other end intercommunication of third hydraulic fluid port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120298293.1U CN214837435U (en) | 2021-02-02 | 2021-02-02 | Supercharger of pulse test bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120298293.1U CN214837435U (en) | 2021-02-02 | 2021-02-02 | Supercharger of pulse test bed |
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| CN214837435U true CN214837435U (en) | 2021-11-23 |
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| CN202120298293.1U Active CN214837435U (en) | 2021-02-02 | 2021-02-02 | Supercharger of pulse test bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
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2021
- 2021-02-02 CN CN202120298293.1U patent/CN214837435U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
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