CN112985683A - Pulsation damper for diesel engine - Google Patents
Pulsation damper for diesel engine Download PDFInfo
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- CN112985683A CN112985683A CN202110387480.1A CN202110387480A CN112985683A CN 112985683 A CN112985683 A CN 112985683A CN 202110387480 A CN202110387480 A CN 202110387480A CN 112985683 A CN112985683 A CN 112985683A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0609—Pressure pulsation damping arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a diesel engine oil pressure testing device, in particular to a pulsation damper for a diesel engine. The pulsation damper for the diesel engine comprises a shell with a hexagonal cross section; the shell is provided with a threaded shaft on one end surface; the center of the threaded shaft is provided with an oil delivery hole with the lower end surface being a claw-shaped concave spherical surface, and a steel ball is arranged in the oil delivery hole; the upper end surface of the oil transportation hole is provided with a baffle plate; the bottom of the oil conveying hole is provided with a channel communicated with the oil conveying hole; the lower end of the channel extends into the shell; an internal thread hole is formed in the other side of the shell corresponding to the threaded shaft; the bottom surface of the internal thread hole is provided with an offset hole which is communicated with the internal thread hole and is eccentrically arranged; a stepped hole for communicating the offset hole with the channel is arranged in the wall surface of one side of the shell; a needle valve is matched with the stepped hole; a gap is formed between the needle valve and the stepped hole, and the gap forms an oil chamber. The invention effectively attenuates the pressure fluctuation in the lubricating oil pressure test pipeline and avoids the lubricating oil pressure test equipment from being damaged due to the pressure fluctuation.
Description
Technical Field
The invention relates to a diesel engine oil pressure testing device, in particular to a pulsation damper for a diesel engine.
Background
In the process of fluid conveying, because the conveying pressure of power devices such as pumps has a pulsation rule, the pressure of fluid can be caused to fluctuate according to factors such as pipe diameter change and bending of pipeline arrangement, the accuracy of pressure testing equipment on a fluid conveying pipeline can be influenced by the fluctuation, and the testing equipment can be damaged in severe cases.
The diesel engine is used as a complex power machine, and the operation of each system of the diesel engine has the characteristic of periodicity, so that the diesel engine has high safety detection requirements in the operation process, needs to detect the pressure in supply systems such as lubricating oil and the like, and needs to be stopped emergently when the pressure exceeds a certain range; the phenomenon of oil pressure fluctuation can interfere with the measurement of oil pressure, and the measurement equipment can be damaged when the fluctuation is too severe; therefore, it is necessary to control the pressure fluctuation in the pressure test line of the diesel engine oil supply system.
Disclosure of Invention
The invention aims to provide a pulsation damper for a diesel engine, which can effectively attenuate pressure fluctuation in a lubricating oil pressure test pipeline and avoid damage to lubricating oil pressure test equipment due to the pressure fluctuation.
The invention adopts the following technical scheme for achieving the purpose:
a pulsation damper for a diesel engine has a housing having a hexagonal cross section; a raised threaded shaft is arranged on one end face of the shell; the threaded shaft and the shell are coaxially arranged; the center of the threaded shaft is provided with an oil delivery hole with a claw-shaped concave spherical surface at the lower end surface, and a steel ball is arranged in the oil delivery hole; the upper end surface of the oil transportation hole is provided with a baffle plate for preventing the steel balls from falling; the bottom of the oil conveying hole is provided with a channel communicated with the oil conveying hole; the size of the channel is smaller than that of the oil conveying hole; the lower end of the channel extends into the shell; an internal thread hole is formed in the other side of the shell corresponding to the threaded shaft; the internal thread hole is coaxially arranged with the threaded shaft; the bottom surface of the internal thread hole is provided with an offset hole which is communicated with the internal thread hole and is eccentrically arranged; the axis of the offset hole is parallel to the axis of the channel; a stepped hole is formed in one side wall surface of the shell; the stepped hole is communicated with the offset hole and the channel; a needle valve in a stepped shaft shape is matched with the stepped hole; a gap for engine oil to flow is formed between the needle valve and the stepped hole, and the gap forms an oil chamber; the needle valve is matched with the stepped hole to form a pulsation buffer which plays a role of buffering external oil pressure when the pressure in the oil chamber and the input oil pressure borne by the steel ball maintain a balance force.
The stepped hole is provided with a first-stage threaded stepped hole, a second-stage stepped hole, a third-stage stepped hole and a fourth-stage stepped hole which are sequentially communicated from the outside to the inside of the shell; the four-stage stepped hole is communicated with the offset hole of the threaded hole, and the three-stage stepped hole is communicated with the channel at the bottom of the oil transportation hole;
the stepped hole the apertures of the first-stage external thread stepped hole, the second-stage stepped hole, the third-stage stepped hole and the fourth-stage stepped hole are reduced in sequence.
The needle valve is in a stepped shaft shape and sequentially comprises a first-stage threaded stepped shaft, a second-stage stepped shaft, a third-stage stepped shaft and a fourth-stage stepped shaft, wherein the first-stage threaded stepped shaft is provided with an inner hexagonal hole; and a gasket and an O-shaped ring are sleeved on the three-stage stepped shaft.
The pulsation buffer for the diesel engine provided by the invention has the advantages of simple structure, convenience in manufacturing and convenience in maintenance, effectively attenuates pressure fluctuation in a lubricating oil pressure test pipeline, and avoids damage to lubricating oil pressure test equipment due to pressure fluctuation.
Drawings
FIG. 1 is a schematic view of the construction of the integral mounting member of the present invention.
Fig. 2 is a schematic view of the overall structure of the present invention.
Fig. 3 is a schematic view of the structure of the housing of the present invention.
FIG. 4 is a schematic view of a needle valve configuration of the present invention.
In the figure: 1-shell, 2-steel ball, 3-needle valve, 4-gasket, 5-O-shaped ring, 10-oil delivery hole, 11-shaft thread, 12-baffle, 13-claw-shaped concave spherical surface, 14-unthreaded hole, 15-threaded hole, 16-offset hole, 17-first-level threaded stepped hole, 18-second-level stepped hole, 19-third-level stepped hole, 110-fourth-level stepped hole, 31-hexagon socket hole, 32-first-level threaded stepped shaft, 33-second-level stepped shaft, 34-third-level stepped shaft and 35-fourth-level stepped shaft.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in the attached drawings, the pulsation damper for the diesel engine comprises a shell 1, a steel ball 2, a needle valve 3, a gasket 4, an O-shaped ring 5 and the like, wherein the shell 1 is in a step outer hexagon shape, one end of the shell is provided with a shaft thread 11, the end face of the shaft thread 11 is provided with a baffle 12, the baffle 12 is arranged after the steel ball 2 is placed in an oil delivery hole 10, the root of the oil delivery hole 10 is a claw-shaped concave spherical surface 13, the root of the oil delivery hole 10 is provided with an unthreaded hole 14, the other end of the oil delivery hole is provided with a threaded hole 15, the root of the threaded hole 15 is provided with an eccentric hole 16, a first-stage stepped threaded hole 17, a second-stage stepped hole 18, a third-stage stepped hole 19 and a fourth-stage stepped hole 110 are arranged in one outer hexagon of the shell 1, the fourth-stage stepped hole 110 is communicated; the needle valve 3 is in a stepped shaft shape and sequentially comprises a first-stage stepped shaft thread 32, a second-stage stepped shaft 33, a third-stage stepped shaft 34 and a fourth-stage stepped shaft 35, the first-stage stepped shaft thread 32 is provided with an inner hexagonal hole 31, and a gasket 4 and an O-shaped ring 5 are sequentially arranged on the third-stage stepped shaft 34; the assembled needle valve 3 is arranged in the shell 1 to form a pulsation damper
The assembled pulsation damper is used, the threaded hole 15 and the shaft thread 11 are connected with the corresponding pipe connector in series, fuel flows into the unthreaded hole 14 from the oil delivery hole 10 through the steel ball 2 in the engine oil transmission process, flows through the offset hole 16 through the gap between the stepped shaft and the stepped hole of the needle valve 3, an oil chamber can be formed between the stepped shaft and the stepped hole of the needle valve 3 by adjusting the needle valve 3, and when the pressure in the oil chamber and the pressure of the input oil on the steel ball 2 maintain a balance force, the pulsation damper plays a role in buffering the external oil pressure.
The lubricating oil pressure fluctuation buffer is simple in structure, convenient to manufacture and convenient to maintain, pressure fluctuation in a lubricating oil pressure test pipeline is effectively attenuated, and damage to lubricating oil pressure test equipment due to the pressure fluctuation is avoided.
Claims (4)
1. A pulsation damper for a diesel engine, characterized in that: the pulsation damper is provided with a shell with a hexagonal cross section; a raised threaded shaft is arranged on one end face of the shell; the threaded shaft and the shell are coaxially arranged; the center of the threaded shaft is provided with an oil delivery hole with a claw-shaped concave spherical surface at the lower end surface, and a steel ball is arranged in the oil delivery hole; the upper end surface of the oil transportation hole is provided with a baffle plate for preventing the steel balls from falling; the bottom of the oil conveying hole is provided with a channel communicated with the oil conveying hole; the size of the channel is smaller than that of the oil conveying hole; the lower end of the channel extends into the shell; an internal thread hole is formed in the other side of the shell corresponding to the threaded shaft; the internal thread hole is coaxially arranged with the threaded shaft; the bottom surface of the internal thread hole is provided with an offset hole which is communicated with the internal thread hole and is eccentrically arranged; the axis of the offset hole is parallel to the axis of the channel; a stepped hole is formed in one side wall surface of the shell; the stepped hole is communicated with the offset hole and the channel; a needle valve in a stepped shaft shape is matched with the stepped hole; a gap for engine oil to flow is formed between the needle valve and the stepped hole, and the gap forms an oil chamber; the needle valve is matched with the stepped hole to form a pulsation buffer which plays a role of buffering external oil pressure when the pressure in the oil chamber and the input oil pressure borne by the steel ball maintain a balance force.
2. A pulsation damper for a diesel engine according to claim 1, characterized in that: the stepped hole is provided with a first-stage threaded stepped hole, a second-stage stepped hole, a third-stage stepped hole and a fourth-stage stepped hole which are sequentially communicated from the outside to the inside of the shell; the four-stage stepped hole is communicated with the offset hole of the threaded hole, and the three-stage stepped hole is communicated with the channel at the bottom of the oil conveying hole.
3. A pulsation damper for a diesel engine according to claim 2, characterized in that: the stepped hole the apertures of the first-stage external thread stepped hole, the second-stage stepped hole, the third-stage stepped hole and the fourth-stage stepped hole are reduced in sequence.
4. A pulsation damper for a diesel engine according to claim 1, characterized in that: the needle valve is in a stepped shaft shape and sequentially comprises a first-stage threaded stepped shaft, a second-stage stepped shaft, a third-stage stepped shaft and a fourth-stage stepped shaft, wherein the first-stage threaded stepped shaft is provided with an inner hexagonal hole; and a gasket and an O-shaped ring are sleeved on the three-stage stepped shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110387480.1A CN112985683A (en) | 2021-04-12 | 2021-04-12 | Pulsation damper for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110387480.1A CN112985683A (en) | 2021-04-12 | 2021-04-12 | Pulsation damper for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112985683A true CN112985683A (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110387480.1A Pending CN112985683A (en) | 2021-04-12 | 2021-04-12 | Pulsation damper for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112985683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551826A (en) * | 2021-07-22 | 2021-10-26 | 西人马联合测控（泉州）科技有限公司 | Pressure sensor and preparation method thereof |
-
2021
- 2021-04-12 CN CN202110387480.1A patent/CN112985683A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551826A (en) * | 2021-07-22 | 2021-10-26 | 西人马联合测控（泉州）科技有限公司 | Pressure sensor and preparation method thereof |
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