Distributor integrating high-pressure oil and low-pressure oil and having pressure maintaining function

Abstract

The invention provides a distributor integrating high-pressure oil and low-pressure oil and having a pressure maintaining function. The distributor comprises a distributor body, a plurality of rail pressure sensors are installed above the distributor body, a low-pressure oil return main oil return connector is further installed above the distributor body, and a safety valve is installed on one side of the distributor body. The high-pressure common rail distributor has the beneficial effects that a low-pressure oil return oil way channel is integrated on a traditional distributor, the pressure protection function and the double rail pressure monitoring function are achieved, the whole high-pressure common rail system can be protected, an oil way is simplified, and the risk of oil seepage and oil leakage is reduced.

Description

Technical Field

[0001] The invention belongs to the field of oil circuit distributors, and in particular relates to a distributor which integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function. Background Art

[0002] As the core of the new generation of diesel engine technology, the high-pressure common rail system has been fully developed and widely used in vehicles, electricity, ships, military and other fields.

[0003] The distributor is a key component for achieving stable and consistent rail pressure in the high-pressure common rail system and is widely used in high-power diesel engines. The high-pressure oil supplied by the high-pressure pump first enters the high-pressure oil chamber of the distributor, and is distributed to the common rail pipe in the high-pressure common rail system through the high-pressure oil outlet, so that the high-pressure oil pressure entering each common rail pipe is consistent, thereby making the high-pressure oil pressure entering each injector consistent, and achieving consistent injection pressure in each cylinder. At present, the widely used distributor in diesel engines only has the function of high-pressure oil circuit distribution, such as Figure 1 As shown, this distributor can only distribute the high-pressure oil entering the cavity to the common rail pipe, and does not integrate the low-pressure oil circuit distribution function, which makes the overall oil circuit of the diesel engine complicated and increases the risk of oil seepage and leakage in the oil circuit. Summary of the invention

[0004] In view of this, the present invention aims to provide a distributor that integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function, so as to solve at least one problem existing in the above-mentioned prior art.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A distributor that integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function, comprising a distributor body, a plurality of rail pressure sensors are installed above the distributor body, a low-pressure return oil main return oil joint is also installed above the distributor body, and a safety valve is installed on one side of the distributor body;

[0007] A high-pressure oil circuit and a low-pressure oil circuit are provided inside the distributor body. Both the high-pressure oil circuit and the low-pressure oil circuit are connected to the safety valve, and the high-pressure oil circuit is also connected to the rail pressure sensor.

[0008] Furthermore, there are two rail pressure sensors, which are used to monitor the pressure of the high-pressure oil in the distributor body.

[0009] Furthermore, a sensor mounting hole for mounting a rail pressure sensor is provided above the distributor body.

[0010] Furthermore, the high-pressure oil circuit includes a high-pressure oil inlet circuit and a high-pressure oil outlet circuit, and the high-pressure oil inlet circuit and the high-pressure oil outlet circuit are connected.

[0011] Furthermore, a through hole for a high-pressure oil inlet interface is provided above the distributor body.

[0012] Furthermore, the valve core of the safety valve is connected to the high-pressure oil circuit. When the oil pressure in the high-pressure oil circuit inside the distributor body exceeds the specified oil pressure and is higher than the opening pressure of the safety valve core, the safety valve opens, and the high-pressure oil circuit is connected to the low-pressure oil circuit.

[0013] Furthermore, the low-pressure oil return total oil return joint is a hollow bolt, and the low-pressure oil pipe joint matching the low-pressure oil return total oil return joint is a swivel pipe joint.

[0014] Compared with the prior art, the distributor of the present invention which integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function has the following advantages:

[0015] The present invention discloses a distributor that integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function. The distributor integrates a low-pressure return oil channel on a traditional distributor and has a pressure protection function and a dual rail pressure monitoring function. It can protect the entire high-pressure common rail system and simplify the oil circuit, thereby reducing the risk of oil seepage and leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of a traditional distributor in the prior art;

[0018] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 3 A vertical cross-sectional diagram of the distribution of the high-pressure oil circuit and the low-pressure oil circuit inside the distributor body according to an embodiment of the present invention;

[0020] Figure 4 A schematic cross-sectional view of the oil path distribution inside the distributor body according to an embodiment of the present invention;

[0021] Figure 5 It is a schematic front view of the overall structure described in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0026] like Figures 2 to 5 As shown, a distributor that integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function includes a distributor body, a rail pressure sensor, a safety valve, and a low-pressure return oil return joint. The present invention improves on the traditional distributor and adds a low-pressure oil circuit distribution function and a high-pressure oil pressure protection function. The distributor body schematic diagram is shown in Figure 2 shown.

[0027] The high-pressure oil circuit and low-pressure oil circuit inside the distributor body are distributed as follows Figure 3-Figure 5 shown.

[0028] like Figure 3-Figure 5As shown, the distributor body is equipped with a rail pressure sensor to monitor the pressure of the high-pressure oil in the distributor body. For safety reasons, a redundant design is carried out and two rail pressure sensors are installed. The distributor body is equipped with a safety valve, and the valve core of the safety valve is connected to the high-pressure oil circuit. When the oil pressure of the high-pressure oil circuit inside the distributor body exceeds the specified oil pressure and is higher than the opening pressure of the safety valve valve core, the safety valve will open. At this time, the high-pressure oil circuit is connected to the low-pressure oil circuit for pressure relief, and the oil pressure of the high-pressure oil circuit is reduced, thereby protecting the entire high-pressure common rail system. The low-pressure return oil total return oil joint on the distributor body is a hollow bolt design, and the matching low-pressure oil pipe joint uses a swivel pipe joint. After the injector return oil and the high-pressure pump return oil merge, the total return oil flows to the engine tank through the low-pressure return oil total return oil joint.

[0029] The distributor integrates a low-pressure oil return oil channel on the traditional distributor, and has pressure protection function and dual rail pressure monitoring function. It can not only protect the entire high-pressure common rail system but also simplify the oil circuit and reduce the risk of oil seepage and leakage.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A distributor that integrates high-pressure oil and low-pressure oil and has a pressure-maintaining function, characterized in that: It includes a distributor body, a plurality of rail pressure sensors are installed above the distributor body, a low-pressure oil return main oil return joint is also installed above the distributor body, and a safety valve is installed on one side of the distributor body; A high-pressure oil circuit and a low-pressure oil circuit are provided inside the distributor body. Both the high-pressure oil circuit and the low-pressure oil circuit are connected to the safety valve, and the high-pressure oil circuit is also connected to the rail pressure sensor.

2. A distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 1, characterized in that: There are two rail pressure sensors, which are used to monitor the pressure of the high-pressure oil in the distributor body.

3. A distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 1, characterized in that: A sensor mounting hole for mounting a rail pressure sensor is provided above the distributor body.

4. The distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 1, characterized in that: The high-pressure oil circuit comprises a high-pressure oil inlet oil circuit and a high-pressure oil outlet oil circuit, and the high-pressure oil inlet oil circuit and the high-pressure oil outlet oil circuit are connected.

5. A distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 4, characterized in that: A through hole for a high-pressure oil inlet oil circuit interface is provided above the distributor body.

6. A distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 1, characterized in that: The valve core of the safety valve is connected to the high-pressure oil circuit. When the oil pressure in the high-pressure oil circuit inside the distributor body exceeds the specified oil pressure and is higher than the opening pressure of the valve core of the safety valve, the safety valve opens, and the high-pressure oil circuit is connected to the low-pressure oil circuit.

7. The distributor integrating high-pressure oil and low-pressure oil and having a pressure-maintaining function according to claim 1, characterized in that: The low-pressure oil return total oil return joint is a hollow bolt, and the low-pressure oil pipe joint matching the low-pressure oil return total oil return joint is a swivel pipe joint.

Images