High-pressure rail regulating valve of high-pressure common rail pump
By designing a high-pressure rail regulating valve in a high-pressure common rail pump, and adjusting the spring pressure using the adjustment screws to realize automatic adjustment of high-pressure oil, the problem of narrow application range of high-pressure rail caused by the pressure fixation of the pressure relief valve in the prior art is solved, and the application range of high-pressure rails is improved. Scope of application and efficiency of high-voltage rails.
Patent Information
- Application Number
- CN202420204988.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-26
AI Technical Summary
The pressure relief valve of the existing high-pressure common rail pump is fixed, resulting in a narrow application range of high-pressure rail and cannot be effectively adjusted.
A high-pressure common rail pump high-pressure rail regulating valve is designed. By installing a control valve on the high-pressure rail, the spring pressure is adjusted by adjusting the adjustment screws, and the automatic adjustment of the pressure relief hole is achieved, so that the high-pressure oil can be adjusted between 800 and 1500 bar.
The scope of application of high-pressure rails has been expanded, and the regulation flexibility and use efficiency of high-pressure oil have been improved.
Smart Images
Figure CN222254177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-pressure common rail pumps, in particular to a high-pressure rail regulating valve for a high-pressure common rail pump. Background Art
[0002] The high-pressure common rail pump concentrates the high-pressure oil generated by the injection pump into the high-pressure rail, and controls the opening of each injector through the solenoid valve. During the operation of the injection pump, high-pressure oil is continuously delivered to the high-pressure rail, and the oil pressure in the high-pressure rail continues to increase. Generally, a pressure relief valve is installed on the high-pressure rail. When the oil pressure in the high-pressure rail exceeds the pressure of the pressure relief valve, the oil will be automatically discharged. At present, the pressure of the pressure relief valve is fixed and cannot be adjusted, resulting in a narrow application range of the high-pressure rail. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a high-pressure rail regulating valve for a high-pressure common rail pump in view of the deficiencies of the above-mentioned prior art.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] A high-pressure rail regulating valve of a high-pressure common rail pump comprises a high-pressure rail, an oil outlet hole is processed on the high-pressure rail, high-pressure joints and pressure sensors are respectively connected to the two sides of the high-pressure rail, the high-pressure rail is processed with oil discharge holes and regulating valve mounting holes that are interconnected, a valve seat is installed in the regulating valve mounting hole, a steel ball is arranged between the bottom of the valve seat and the oil discharge hole, an adjusting seat is installed above the regulating valve mounting hole, a spring is arranged between the adjusting seat and the valve seat, a fixing seat is installed at the regulating valve mounting hole, an adjusting screw is connected to the fixing seat, the bottom of the adjusting screw faces the adjusting seat, a locking nut is connected to the adjusting screw, a pressure relief hole is processed at the bottom of the regulating valve mounting hole, the pressure relief hole is connected to an external oil discharge joint, and when the pressure in the high-pressure rail breaks through the spring resistance, the high-pressure oil in the high-pressure rail is discharged from the pressure relief hole.
[0006] Furthermore, the orifice position of the oil drain hole and the bottom of the valve seat are processed with a tapered hole that matches the steel ball.
[0007] Furthermore, a compression spring is installed in the valve seat, and the compression spring compresses the steel ball.
[0008] Furthermore, a sealing ring is arranged on the outer side above the valve seat.
[0009] Furthermore, a guide column is processed on the bottom of the adjustment seat, a mounting groove is processed on the upper surface of the valve seat, the upper end of the spring is sleeved on the outside of the guide column, and the lower end of the spring is arranged in the mounting groove.
[0010] Furthermore, a limiting step is processed above the regulating valve mounting hole, and a limiting baffle is arranged around the top of the regulating seat.
[0011] Compared with the prior art, the utility model provides a high-pressure rail regulating valve for a high-pressure common rail pump, which adjusts the spring pressure by adjusting the screw, so that the regulating valve is adjustable between 800 and 1500 bar, thereby improving the application range of the high-pressure rail. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 yes Figure 1 The enlarged view of point A in the middle;
[0014] Among them, 1. high-pressure rail, 2. oil outlet hole, 3. high-pressure connector, 4. pressure sensor, 5. oil drain hole, 6. valve seat, 7. steel ball, 8. compression spring, 9. adjustment seat, 10. spring, 11. fixed seat, 12. adjusting screw, 13. locking nut, 14. pressure relief hole, 15. sealing ring, 16. limit step, 17. limit baffle. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present utility model will be described clearly and completely below.
[0016] like Figure 1 and Figure 2 As shown, a high-pressure rail regulating valve of a high-pressure common rail pump comprises a high-pressure rail 1, on which a plurality of oil outlet holes 2 are processed, and high-pressure connectors 3 and pressure sensors 4 are respectively connected on both sides of the high-pressure rail 1, and oil discharge holes 5 and regulating valve mounting holes which are interconnected are processed on the high-pressure rail 1, and a valve seat 6 is installed in the regulating valve mounting hole, and a steel ball 7 is arranged between the bottom of the valve seat 6 and the oil discharge hole 5, and a tapered hole matching the steel ball 7 is processed at the orifice position of the oil discharge hole 5 and the bottom of the valve seat 6, wherein a clamping spring 8 is installed in the valve seat 6, and the clamping spring 8 clamps the steel ball 7 to eliminate the gap generated during the processing, so that the steel ball 7 is pressed at the orifice position of the oil discharge hole 5.
[0017] An adjusting seat 9 is installed above the regulating valve mounting hole, and a spring 10 is arranged between the adjusting seat 9 and the valve seat 6, wherein a guide column is processed at the bottom of the regulating seat 9, and a mounting groove is processed on the upper surface of the valve seat 6. The upper end of the spring 10 is sleeved on the outside of the guide column, and the lower end of the spring 10 is arranged in the mounting groove. A fixing seat 11 is installed at the mounting hole of the regulating valve, and an adjusting screw 12 is connected to the fixing seat 11. The bottom of the adjusting screw 12 faces the adjusting seat 9, and a locking nut 13 is connected to the adjusting screw 12. When in use, the adjusting screw 12 is screwed, and the adjusting screw 12 squeezes the adjusting seat 9 to control the elastic force of the spring. After the adjustment is completed, the adjusting screw 12 is locked by the locking nut 13. A pressure relief hole 14 is processed at the bottom of the regulating valve mounting hole, and the pressure relief hole 14 is connected to an external oil drain joint. When the pressure in the high-pressure rail breaks through the resistance of the spring 10, the high-pressure oil in the high-pressure rail is discharged from the pressure relief hole 14.
[0018] A sealing ring 15 is arranged on the outer side above the valve seat 6 to prevent leakage of high-pressure oil.
[0019] A limiting step 16 is processed above the regulating valve mounting hole, and a limiting baffle 17 is arranged around the upper part of the regulating seat 9. The limiting step 16 can block the limiting baffle 17 to prevent the spring 10 from being excessively squeezed.
[0020] The present invention is not limited to the described embodiments. Those skilled in the art may make some modifications or changes without departing from the spirit and scope of the present invention, that is, within the scope of disclosure. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the claims.
Claims
1. A high-pressure rail regulating valve for a high-pressure common rail pump, comprising a high-pressure rail, an oil outlet hole being machined on the high-pressure rail, and high-pressure connectors and pressure sensors being connected to both sides of the high-pressure rail, characterized in that: The high-pressure rail is processed with an oil drain hole and a regulating valve mounting hole that are interconnected. A valve seat is installed in the regulating valve mounting hole, and a steel ball is arranged between the bottom of the valve seat and the oil drain hole. An adjusting seat is installed above the regulating valve mounting hole, and a spring is arranged between the adjusting seat and the valve seat. A fixing seat is installed at the opening of the regulating valve mounting hole, and an adjusting screw is connected to the fixing seat. The bottom of the adjusting screw faces the adjusting seat, and a locking nut is connected to the adjusting screw. A pressure relief hole is processed at the bottom of the regulating valve mounting hole, and the pressure relief hole is connected to an external oil drain joint. When the pressure in the high-pressure rail breaks through the spring resistance, the high-pressure oil in the high-pressure rail is discharged from the pressure relief hole.
2. A high-pressure rail regulating valve for a high-pressure common rail pump according to claim 1, characterized in that: The orifice position of the oil drain hole and the bottom of the valve seat are processed with a tapered hole that matches the steel ball.
3. The high-pressure rail regulating valve of a high-pressure common rail pump according to claim 1, characterized in that: A compression spring is installed in the valve seat, and the compression spring compresses the steel ball.
4. The high-pressure rail regulating valve of a high-pressure common rail pump according to claim 1, characterized in that: A sealing ring is arranged on the outer side above the valve seat.
5. The high-pressure rail regulating valve of a high-pressure common rail pump according to claim 1, characterized in that: A guide column is processed at the bottom of the regulating seat, a mounting groove is processed on the upper surface of the valve seat, the upper end of the spring is sleeved on the outside of the guide column, and the lower end of the spring is arranged in the mounting groove.
6. The high-pressure rail regulating valve of a high-pressure common rail pump according to claim 1, characterized in that: A limited step is processed above the regulating valve mounting hole, and a limited baffle is arranged around the upper part of the regulating seat.