CN218376704U - Constant pressure valve test system for engine fuel regulation - Google Patents
Constant pressure valve test system for engine fuel regulation Download PDFInfo
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- CN218376704U CN218376704U CN202222335488.6U CN202222335488U CN218376704U CN 218376704 U CN218376704 U CN 218376704U CN 202222335488 U CN202222335488 U CN 202222335488U CN 218376704 U CN218376704 U CN 218376704U
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Abstract
The utility model discloses a level pressure valve test system for engine fuel adjusts relates to engine fuel regulator field, include: one end of the high-pressure oil inlet pipe is communicated with a high-pressure cavity interface of the constant-pressure valve, and the other end of the high-pressure oil inlet pipe is communicated with the oil pump; one end of the low-pressure oil inlet pipe is communicated with a low-pressure cavity interface of the constant-pressure valve, and the other end of the low-pressure oil inlet pipe is connected with a pressure reducing valve which is communicated with the oil pump; one end of the oil outlet pipe is communicated with an oil outlet cavity interface of the constant pressure valve, and the other end of the oil outlet pipe is communicated with an oil tank; one end of the differential pressure transmitter is communicated with the low-pressure oil inlet pipe, and the other end of the differential pressure transmitter is communicated with the oil outlet pipe; a differential pressure transmitter is located at an upstream end of the first throttle valve. Compared with the prior art, the utility model has the advantages as follows: the differential pressure of the low-pressure oil inlet pipe and the low-pressure oil outlet pipe is observed through the differential pressure transmitter, then the first throttle valve is slowly adjusted, the stability of the differential pressure under different flow rates is observed, and the differential pressure test of the constant-pressure valve is realized.
Description
Technical Field
The utility model relates to an engine fuel regulator field specifically is a level pressure valve test system for engine fuel is adjusted.
Background
The constant pressure valve is used for an engine fuel regulator and is a special hydraulic component suitable for kerosene media, as shown in figure 1, the existing constant pressure valve comprises a lining, a gasket, a spring and a valve rod, wherein the gasket, the spring and the valve rod are arranged in the lining, the gasket is arranged at the inner axial end of the lining, the valve rod moves axially, the spring is arranged between the valve rod and the gasket, the spring correspondingly stretches along with the movement of the valve rod, three hydraulic oil ports are formed in the constant pressure valve, low-pressure oil Pb is introduced into a left cavity (a low-pressure cavity), high-pressure oil Ps is introduced into a middle cavity (a high-pressure cavity), and an output oil pressure Pc is introduced into a right cavity (an oil outlet cavity). And adjusting the input quantity of the high-pressure oil Ps according to the pressure change of the output oil pressure Pc to realize the constant-pressure output of the output oil pressure Pc. In order to test the performance of the constant pressure valve, the performance test of the constant pressure valve is required, and the existing test system can only realize single pressure or tightness test and cannot carry out a pressure difference test.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of above-mentioned background art, provide a level pressure valve test system for engine fuel adjusts.
The utility model provides a level pressure valve test system for engine fuel adjusts, include:
an oil tank in which an oil pump is disposed;
one end of the high-pressure oil inlet pipe is communicated with a high-pressure cavity interface of the constant-pressure valve, and the other end of the high-pressure oil inlet pipe is communicated with the oil pump;
one end of the low-pressure oil inlet pipe is communicated with a low-pressure cavity interface of the constant-pressure valve, the other end of the low-pressure oil inlet pipe is connected with a pressure reducing valve, and the pressure reducing valve is communicated with the oil pump;
one end of the oil outlet pipe is communicated with an oil outlet cavity interface of the constant pressure valve, and the other end of the oil outlet pipe is communicated with an oil tank;
the first throttling valve is arranged on the oil outlet pipe;
one end of the differential pressure transmitter is communicated with the low-pressure oil inlet pipe, and the other end of the differential pressure transmitter is communicated with the oil outlet pipe; the differential pressure transmitter is located at an upstream end of the first throttling valve.
Further, still include the second choke valve, set up on the oil outlet pipe, and be located the downstream end of first choke valve.
Further, a second flowmeter is arranged on the second throttle valve.
Further, a first flow meter is arranged on the first throttling valve.
The low-pressure oil inlet pipe is communicated with the low-pressure oil inlet pipe, and the overflow valve is positioned between the pressure reducing valve and the low-pressure cavity interface; and the connecting node of the differential pressure transmitter and the low-pressure oil inlet pipe is positioned between the overflow valve and the low-pressure cavity interface.
Further, still include first manometer, set up on the oil pipe, and be located first choke valve with between the differential pressure transmitter.
Further, still include the second manometer, set up on the low pressure advances oil pipe.
Furthermore, the constant pressure valve further comprises a plurality of adjusting gaskets with different thicknesses, wherein the adjusting gaskets are arranged in the bushing of the constant pressure valve and are positioned at one end, back to the valve rod, of the spring of the constant pressure valve.
Furthermore, a high-pressure three-way joint is arranged on the high-pressure cavity interface, one end of the high-pressure three-way joint is communicated with the high-pressure oil inlet pipe, the other end of the high-pressure three-way joint is connected with a high-pressure inner leakage detection pipe, a first opening and closing valve and a first measuring cup are communicated on the high-pressure inner leakage detection pipe, and the first opening and closing valve is located between the first measuring cup and the high-pressure three-way joint.
Furthermore, a low-pressure three-way joint is arranged on the low-pressure cavity interface, one end of the low-pressure three-way joint is communicated with the low-pressure oil inlet pipe, the other end of the low-pressure three-way joint is connected with a low-pressure inner leakage detection pipe, a second opening and closing valve and a second measuring cup are communicated on the low-pressure inner leakage detection pipe, and the second opening and closing valve is located between the second measuring cup and the low-pressure three-way joint.
Compared with the prior art, the utility model has the advantages as follows: through set up the differential pressure transmitter who is linked together between low pressure oil inlet pipe and play oil pipe to set up first choke valve in its downstream end, through the switching degree of adjusting first choke valve, make the high pressure chamber and the low pressure chamber of level pressure valve reach the technical requirement value, rethread differential pressure transmitter observes the pressure differential of low pressure oil inlet pipe and play oil pipe, and the pressure differential test of level pressure valve is realized to first choke valve of slow adjustment again, the pressure differential stability under the observation different flow.
Drawings
Fig. 1 is a schematic structural view of a constant pressure shutter in the prior art.
Fig. 2 is a schematic structural diagram of a constant pressure valve testing system for adjusting engine fuel according to the present invention.
In the figure: 1-a bushing; 2-a gasket; 3-a spring; 4-a valve rod; 5-an oil tank; 6-high pressure oil inlet pipe; 7-low pressure oil inlet pipe; 8-an oil outlet pipe; 9-a first throttle valve; 10-a second throttle valve; 11-differential pressure transmitter; 12-an overflow valve; 13-a pressure relief valve; 14-a first pressure gauge; 15-a second pressure gauge; 100-constant pressure valve.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein may be implemented by any functional block or functional arrangement, and that any functional block or functional arrangement may be implemented as a physical entity or a logical entity, or a combination of both.
In order to better understand the present invention for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Note that: the following examples are merely one specific example, and are not intended to limit the embodiments of the present invention to the specific steps, values, conditions, data, sequences, etc. described below. Those skilled in the art can, upon reading this specification, utilize the inventive concepts to construct more embodiments than those specifically described herein.
Fig. 1 shows a structure of a conventional constant pressure valve, which includes a bushing, a gasket disposed in the bushing, a spring, and a valve rod, wherein the gasket is disposed at an axial inner end of the bushing, the valve rod moves along an axial direction, the spring is disposed between the valve rod and the gasket, the spring correspondingly extends and retracts along with the movement of the valve rod, the constant pressure valve is provided with three hydraulic ports, a left chamber (a low pressure chamber) is filled with low pressure oil Pb, a middle chamber (a high pressure chamber) is filled with high pressure oil Ps, and a right chamber (an oil outlet chamber) is filled with output oil pressure Pc.
The working principle is as follows: the left cavity is communicated with low-pressure oil, the middle cavity is communicated with high-pressure oil, and the right cavity outputs oil. If the constant pressure oil is consumed too much, the pressure of the right cavity is reduced, the valve rod moves to the right under the action of the spring force, a large oil inlet hole is opened, and the oil pressure is recovered. If the pressure is increased, the control process is opposite, the output oil pressure Pc is kept higher than the low-pressure cavity Pb, and the valve motion balance equation is as follows: 1/4 (Pc-Pb) π D 2 ＝FK。
As shown in fig. 2, the utility model provides a level pressure valve test system for engine fuel adjusts, include: the oil tank, high pressure advance oil pipe, low pressure advance oil pipe, go out oil pipe, first choke valve, second choke valve, differential pressure transmitter, first flowmeter, second flowmeter, overflow valve, first manometer, second manometer.
An oil pump is arranged in the oil tank. The downstream ends of the overflow valve and the second throttle valve are also provided with oil tanks.
One end of the high-pressure oil inlet pipe is communicated with a high-pressure cavity interface of the constant-pressure valve, and the other end of the high-pressure oil inlet pipe is communicated with the oil pump and used for inputting high-pressure oil into the high-pressure cavity of the constant-pressure valve through the high-pressure cavity interface.
One end of the low-pressure oil inlet pipe is communicated with a low-pressure cavity connector of the constant-pressure valve, the other end of the low-pressure oil inlet pipe is connected with a pressure reducing valve, and the pressure reducing valve is communicated with the oil pump. And under the action of the pressure reducing valve, the low-pressure oil inlet pipe inputs low-pressure oil into the low-pressure cavity of the constant-pressure valve through the low-pressure cavity interface.
One end of the oil outlet pipe is communicated with an oil outlet cavity interface of the constant pressure valve, and the other end of the oil outlet pipe is communicated with an oil tank.
The first throttle valve is arranged on the oil outlet pipe.
One end of the differential pressure transmitter is communicated with the low-pressure oil inlet pipe, and the other end of the differential pressure transmitter is communicated with the oil outlet pipe; the differential pressure transmitter is located at an upstream end of the first throttle valve.
The second throttling valve is arranged on the oil outlet pipe and is positioned at the downstream end of the first throttling valve. The upstream and downstream in this embodiment mean the direction of flow of the oil, and the oil flows from the upstream to the downstream. The second throttle valve is arranged at the downstream end of the first throttle valve, and the oil firstly passes through the first throttle valve and then passes through the second throttle valve.
The first throttling valve is provided with a first flow meter. The second throttle valve is provided with a second flowmeter.
The overflow valve is communicated with the low-pressure oil inlet pipe and is positioned between the pressure reducing valve and the low-pressure cavity interface; and the connecting node of the differential pressure transmitter and the low-pressure oil inlet pipe is positioned between the overflow valve and the low-pressure cavity interface.
First manometer setting is in go out on the oil pipe, and be located first choke valve with between the differential pressure transmitter. The second manometer sets up on the low pressure advances oil pipe. The first pressure gauge and the second pressure gauge are used for measuring oil pressure.
The constant pressure valve is characterized by further comprising a plurality of adjusting gaskets with different thicknesses, wherein the adjusting gaskets are arranged in the bushing of the constant pressure valve and are positioned at one end, back to the valve rod, of the spring of the constant pressure valve. In fact, the adjusting shim, that is, the shim in fig. 1 in the prior art, is different in that the shim in the prior art is the only fixed thickness, and the adjusting shims of this embodiment are multiple and have different thicknesses, and according to the pressure difference requirement after the pressure difference test of the constant pressure valve, the original shim in the constant pressure valve is replaced with the adjusting shim with the appropriate thickness, so as to adjust the pressure difference of the constant pressure valve.
The test system of this embodiment is adopted to carry out the constant pressure valve pressure reduction differential pressure test:
the first throttling valve and the second throttling valve are adjusted to be slightly opened, the oil pump is started, the constant-pressure valve is slowly used, the high-pressure cavity and the low-pressure cavity of the constant-pressure valve reach technical requirement values, the pressure difference of the low-pressure oil inlet pipe and the low-pressure oil outlet pipe is observed through the differential pressure transmitter, then the opening degree of the first throttling valve and the opening degree of the second throttling valve are slowly adjusted, and the stability of the pressure difference under different flow rates is observed.
After the pressure difference is stable, if the requirement of the pressure difference between the oil outlet cavity and the low pressure cavity cannot be met, the requirement can be met by adjusting the thickness of an adjusting gasket in the constant pressure piston.
According to the pressure reduction and pressure difference experiment method, the pressure difference of the constant pressure valve is controlled within a required range, the opening degrees of the first throttle valve and the second throttle valve are adjusted, the readings of the first flow meter and the second flow meter are observed, and the maximum limit value, the minimum limit value and the variation amount corresponding to the pressure difference are recorded.
The high-pressure cavity connector is provided with a high-pressure three-way joint, one end of the high-pressure three-way joint is communicated with the high-pressure oil inlet pipe, the other end of the high-pressure three-way joint is connected with a high-pressure inner leakage detection pipe, the high-pressure inner leakage detection pipe is communicated with a first opening and closing valve and a first measuring cup, and the first opening and closing valve is located between the first measuring cup and the high-pressure three-way joint.
The method for testing the internal leakage of the constant pressure valve comprises the following steps: and (3) closing the high-pressure oil inlet pipe, opening the first opening and closing valve to enable the high-pressure inner leakage detection pipe to be communicated with the atmosphere, starting the oil pump, pressurizing the low-pressure cavity of the constant-pressure valve by the low-pressure oil inlet pipe, waiting for 1 minute after the low-pressure oil inlet pipe rises to rated pressure, and detecting the leakage amount of the high-pressure cavity by using the first measuring cup, namely the oil amount flowing out of the high-pressure inner leakage detection pipe. The operation can be repeated for three times, and the leakage test in the high-pressure cavity is carried out.
The low-pressure cavity connector is provided with a low-pressure three-way joint, one end of the low-pressure three-way joint is communicated with the low-pressure oil inlet pipe, the other end of the low-pressure three-way joint is connected with a low-pressure inner leakage detection pipe, the low-pressure inner leakage detection pipe is communicated with a second opening and closing valve and a second measuring cup, and the second opening and closing valve is located between the second measuring cup and the low-pressure three-way joint.
The low pressure chamber may be tested for internal leakage in a manner similar to the high pressure chamber internal leakage test described above. And (3) closing the low-pressure oil inlet pipe, opening a second opening and closing valve to enable the low-pressure internal leakage detection pipe to be communicated with the atmosphere, starting the oil pump, pressurizing the high-pressure cavity of the constant-pressure valve by the high-pressure oil inlet pipe, waiting for 1 minute after the high-pressure oil inlet pipe rises to rated pressure, and detecting the leakage amount of the low-pressure cavity by using a first measuring cup, namely the oil amount flowing out of the low-pressure internal leakage detection pipe. The operation can be repeated for three times to carry out the leakage test in the low-pressure cavity.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A constant pressure valve test system for engine fuel regulation, comprising:
an oil tank in which an oil pump is disposed;
one end of the high-pressure oil inlet pipe is communicated with a high-pressure cavity interface of the constant-pressure valve, and the other end of the high-pressure oil inlet pipe is communicated with the oil pump;
one end of the low-pressure oil inlet pipe is communicated with a low-pressure cavity interface of the constant-pressure valve, and the other end of the low-pressure oil inlet pipe is connected with a pressure reducing valve which is communicated with the oil pump;
one end of the oil outlet pipe is communicated with an oil outlet cavity interface of the constant pressure valve, and the other end of the oil outlet pipe is communicated with an oil tank;
the first throttling valve is arranged on the oil outlet pipe;
one end of the differential pressure transmitter is communicated with the low-pressure oil inlet pipe, and the other end of the differential pressure transmitter is communicated with the oil outlet pipe; the differential pressure transmitter is located at an upstream end of the first throttling valve.
2. The constant pressure valve testing system for engine fuel regulation of claim 1 further comprising a second throttling valve disposed on the flowline at a downstream end of the first throttling valve.
3. The constant pressure valve test system for engine fuel regulation as set forth in claim 2, wherein the second throttle valve is provided with a second flow meter.
4. The constant pressure valve test system for engine fuel regulation as set forth in claim 1, wherein the first throttle valve is provided with a first flow meter.
5. The constant pressure valve testing system for engine fuel regulation of claim 1, further comprising an overflow valve in communication with the low pressure inlet pipe, the overflow valve being located between the pressure reducing valve and the low pressure chamber interface; and the connecting node of the differential pressure transmitter and the low-pressure oil inlet pipe is positioned between the overflow valve and the low-pressure cavity interface.
6. The constant pressure valve testing system for engine fuel regulation of claim 1, further comprising a first pressure gauge disposed on the flowline and located between the first throttle valve and the differential pressure transmitter.
7. The system for testing the constant pressure valve used for regulating the fuel of the engine as claimed in claim 1, further comprising a second pressure gauge disposed on the low pressure fuel inlet pipe.
8. A constant pressure valve test system for engine fuel regulation as defined in claim 1 further comprising a plurality of shims of different thicknesses, said shims being disposed within a liner of the constant pressure valve at an end of the constant pressure valve spring opposite the valve stem.
9. The system for testing the constant-pressure valve used for regulating the fuel of the engine as claimed in claim 1, wherein a high-pressure tee joint is arranged on the high-pressure cavity interface, one end of the high-pressure tee joint is communicated with the high-pressure fuel inlet pipe, the other end of the high-pressure tee joint is connected with a high-pressure inner leakage detection pipe, a first on-off valve and a first measuring cup are communicated on the high-pressure inner leakage detection pipe, and the first on-off valve is positioned between the first measuring cup and the high-pressure tee joint.
10. The constant pressure valve testing system for engine fuel regulation according to claim 1, wherein a low pressure three-way joint is arranged on the low pressure cavity interface, one end of the low pressure three-way joint is communicated with the low pressure oil inlet pipe, the other end of the low pressure three-way joint is connected with a low pressure inner leakage detection pipe, a second open and close valve and a second measuring cup are communicated with the low pressure inner leakage detection pipe, and the second open and close valve is positioned between the second measuring cup and the low pressure three-way joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335488.6U CN218376704U (en) | 2022-08-31 | 2022-08-31 | Constant pressure valve test system for engine fuel regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222335488.6U CN218376704U (en) | 2022-08-31 | 2022-08-31 | Constant pressure valve test system for engine fuel regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218376704U true CN218376704U (en) | 2023-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222335488.6U Active CN218376704U (en) | 2022-08-31 | 2022-08-31 | Constant pressure valve test system for engine fuel regulation |
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| Country | Link |
|---|---|
| CN (1) | CN218376704U (en) |
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2022
- 2022-08-31 CN CN202222335488.6U patent/CN218376704U/en active Active
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