Pump cover integrated with pressure relief valve and electronic oil pump

Abstract

The utility model provides a pump cover and electronic oil pump of integrated pressure relief valve belongs to electronic oil pump technical field, include: cover the article piece is provided with low pressure groove, valve cavity and rotor groove, valve cavity is located between low pressure groove with rotor groove, valve cavity forms has open position and close position, valve body subassembly, it includes valve core, valve core is located in valve cavity and can remove open position or close position. The utility model discloses by integrating valve cavity in cover the article piece inside, and set up valve core in the flow channel between low pressure groove and rotor groove, make pump cover own have pressure relief function, when system pressure is unusually high, valve core can remove open position automatically, and the low pressure groove is connected with rotor groove, realizes pressure release, under normal circumstances valve core is in close position, and the valve cavity is blocked, and the system tightness is maintained, and the external pressure relief valve is saved, and the whole structure of oil pump is simplified, and the leakage point is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of electronic oil pump technology, and relates to a pump cover with an integrated pressure relief valve and an electronic oil pump. Background Technology

[0002] In positive displacement hydraulic systems such as electric oil pumps, gear pumps, or rotary pumps, pressure relief valves are usually installed to prevent abnormal increases in system pressure due to outlet blockage, temperature rise, or control failure. These valves protect the pump body and downstream components from damage. In traditional designs, pressure relief valves are often independent external components, connected to the outside of the pump body or the oil circuit system via pipelines or threaded interfaces.

[0003] However, such external pressure relief valves have significant drawbacks: First, the additional connection interface increases potential leakage points and reduces the system's sealing reliability; second, the external structure occupies extra installation space, making it difficult to place in space-sensitive applications such as new energy vehicles and compact industrial equipment; third, external piping introduces fluid inertia and volumetric hysteresis, affecting the pressure relief response speed and potentially causing excessively high pressure peaks that could damage precision components; furthermore, independent pressure relief valves require separate assembly, debugging, and maintenance, increasing manufacturing costs and after-sales complexity, thus leaving considerable room for improvement. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a pump cover with an integrated pressure relief valve and an electronic oil pump.

[0005] The objective of this utility model can be achieved through the following technical solution: a pump cover with an integrated pressure relief valve, comprising:

[0006] The cover has a low-pressure groove, a valve chamber and a rotor groove. The valve chamber is located between the low-pressure groove and the rotor groove and has an open position and a closed position.

[0007] A valve body assembly includes a valve core located within the valve cavity and movable to the open position or the closed position. When the valve core is in the open position, the low-pressure slot communicates with the rotor slot through the valve cavity. When the valve core is in the closed position, the valve cavity is blocked.

[0008] In the pump cover of the aforementioned integrated pressure relief valve, the valve chamber includes a first channel and a second channel. The first channel is connected to the second channel, the first channel is connected to the low-pressure groove, and the second channel is connected to the rotor groove. The open position and the closed position are both located in the second channel.

[0009] In the pump cover of the aforementioned integrated pressure relief valve, the diameter of the second channel is smaller than the diameter of the first channel.

[0010] In the pump cover of the aforementioned integrated pressure relief valve, the valve body assembly further includes a spring located inside the valve cavity. The two ends of the spring are respectively connected to the valve core and the cover body. The spring pushes the valve core to move from the open position to the closed position.

[0011] In the pump cover of the aforementioned integrated pressure relief valve, the valve core is configured as a ball.

[0012] In the pump cover of the aforementioned integrated pressure relief valve, the cover body is further provided with a plug, and one end of the spring is connected to the cover body through the plug.

[0013] In the pump cover of the aforementioned integrated pressure relief valve, the cover body is further provided with a first connecting part, and the plug is provided with a second connecting part. The plug is detachably connected to the first connecting part of the cover body through the second connecting part.

[0014] In the pump cover of the aforementioned integrated pressure relief valve, the first connecting part is configured with an internal thread, and the second connecting part is configured with an external thread, and the second connecting part can be threadedly connected to the first connecting part.

[0015] In the pump cover of the aforementioned integrated pressure relief valve, the cover itself is further provided with a high-pressure groove and an outlet, the high-pressure groove being connected to the outlet.

[0016] Secondly, an electronic oil pump, including the pump cover with the aforementioned integrated pressure relief valve.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By integrating a valve chamber inside the cover and placing the valve core in the flow channel between the low-pressure groove and the rotor groove, the pump cover itself has a pressure relief function. When the system pressure rises abnormally, the valve core can automatically move to the open position, connecting the low-pressure groove and the rotor groove to release the pressure. Under normal operating conditions, the valve core is in the closed position, sealing the valve chamber and maintaining the system's sealing performance. This integrated design eliminates the need for an external pressure relief valve, simplifies the overall structure of the oil pump, reduces leakage points, improves reliability, and reduces assembly costs and space occupation.

[0019] 2. The valve chamber is divided into a first channel and a second channel to form a clear guiding structure for the fluid path. The first channel is connected to the low-pressure groove as the inlet, and the second channel is connected to the rotor groove as the outlet. The valve core's movement position is concentrated in the second channel, which is conducive to precise control of the opening and closing state, avoids response delay or poor sealing caused by mixed flow channels, and improves the stability and repeatability of the pressure relief action.

[0020] 3. By installing a spring in the valve cavity, the valve core is always pushed to the closed position by elastic force when there is no abnormal high pressure, ensuring the sealing of the system under normal conditions. This passive reset mechanism does not require external control, has a simple and reliable structure, responds quickly, and effectively prevents accidental opening caused by valve core jamming or gravity offset. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pump cover of the integrated pressure relief valve of this utility model.

[0022] Figure 2 This is a schematic diagram of the pump cover of the integrated pressure relief valve of this utility model.

[0023] Figure 3 This is an exploded view of the pump cover of the integrated pressure relief valve of this utility model.

[0024] Figure 4 This is a top view of the pump cover of the integrated pressure relief valve of this utility model.

[0025] Figure 5 for Figure 4 A cross-sectional view from the perspective of AA.

[0026] In the figure, 100 is the cover; 110 is the low-pressure groove; 120 is the valve chamber; 121 is the first channel; 122 is the second channel; 130 is the rotor groove; 140 is the plug; 150 is the high-pressure groove; 160 is the outlet; 200 is the valve body assembly; 210 is the valve core; and 220 is the spring. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0033] like Figures 1-5 As shown, a pump cover with an integrated pressure relief valve includes: a cover body 100 and a valve body assembly 200.

[0034] The cover element 100 is provided with a low-pressure groove 110, a valve chamber 120 and a rotor groove 130. The valve chamber 120 is located between the low-pressure groove 110 and the rotor groove 130, and the valve chamber 120 has an open position and a closed position.

[0035] The valve body assembly 200 includes a valve core 210, which is located in the valve cavity 120 and can be moved to the open position or the closed position. When the valve core 210 is in the open position, the low pressure groove 110 is connected to the rotor groove 130 through the valve cavity 120. When the valve core 210 is in the closed position, the valve cavity 120 is blocked.

[0036] In this embodiment, by integrating a valve cavity 120 inside the cover 100 and placing the valve core 210 in the flow channel between the low-pressure groove 110 and the rotor groove 130, the pump cover itself has a pressure relief function. When the system pressure rises abnormally, the valve core 210 can automatically move to the open position, connecting the low-pressure groove 110 and the rotor groove 130 to release pressure. Under normal operating conditions, the valve core 210 is in the closed position, sealing the valve cavity 120 and maintaining the system's sealing performance. This integrated design eliminates the need for an external pressure relief valve, simplifies the overall structure of the oil pump, reduces leakage points, improves reliability, and reduces assembly costs and space occupation.

[0037] like Figures 1-5 As shown, based on the above embodiment, the valve chamber 120 includes a first channel 121 and a second channel 122. The first channel 121 is connected to the second channel 122. The first channel 121 is connected to the low-pressure groove 110. The second channel 122 is connected to the rotor groove 130. The open position and the closed position are both located in the second channel 122.

[0038] In this embodiment, the valve chamber 120 is divided into a first channel 121 and a second channel 122, so that the fluid path forms a clear guiding structure. The first channel 121 is connected to the low-pressure groove 110 as an inlet, and the second channel 122 is connected to the rotor groove 130 as an outlet 160. The action position of the valve core 210 is concentrated in the second channel 122, which is conducive to precise control of the opening and closing state, avoiding response delay or poor sealing caused by mixed flow channels, and improving the stability and repeatability of the pressure relief action.

[0039] Preferably, the first channel 121 and the second channel 122 are integrally formed.

[0040] like Figures 1-5 As shown, based on the above embodiment, the diameter of the second channel 122 is smaller than the diameter of the first channel 121.

[0041] In this embodiment, the diameter of the second channel 122 is smaller than that of the first channel 121, which can enhance the sealing contact pressure when the valve core 210 is closed and improve the reliability of the seal.

[0042] like Figures 1-5 As shown, based on the above embodiment, the valve body assembly 200 further includes a spring 220, which is located inside the valve cavity 120. The two ends of the spring 220 are respectively connected to the valve core 210 and the cover body. The spring 220 pushes the valve core 210 to move from the open position to the closed position.

[0043] In this embodiment, by setting a spring 220 in the valve cavity 120, the valve core 210 is always pushed to the closed position by elastic force when there is no abnormal high pressure, ensuring the sealing of the system under normal conditions. This passive reset mechanism does not require external control, has a simple and reliable structure, responds quickly, and effectively prevents accidental opening caused by valve core 210 jamming or gravity offset.

[0044] like Figures 1-5 As shown, based on the above embodiment, the valve core 210 is configured as a ball.

[0045] In this embodiment, the valve core 210 is set as a ball. Utilizing its smooth surface and isotropic geometric characteristics, it has low frictional resistance and smooth movement when moving in the valve cavity 120. It can also form line contact or near-point contact with the channel opening in the closed position, thereby increasing the sealing specific pressure, enhancing the sealing effect, reducing wear, and extending service life.

[0046] like Figures 1-5 As shown, based on the above embodiment, the cover body is also provided with a plug 140, and one end of the spring 220 is connected to the cover body through the plug 140.

[0047] In this embodiment, by adding a plug 140 to fix one end of the spring 220, the spring 220 is more securely installed and positioned, preventing it from shifting or falling off during long-term vibration or high-frequency operation. As an independent component, the plug 140 facilitates the pre-installation of the spring 220 before overall assembly, improving the convenience of manufacturing and maintenance.

[0048] like Figures 1-5 As shown, based on the above embodiment, the cover body is further provided with a first connecting part (not shown in the figure), and the plug 140 is provided with a second connecting part (not shown in the figure). The plug 140 is detachably connected to the first connecting part of the cover body through the second connecting part.

[0049] In this embodiment, the plug 140 is connected to the cover body in a detachable connection manner, so that the valve body assembly 200 (including spring 220 and valve core 210) can be removed from the cover body as a whole, which facilitates maintenance, replacement or cleaning of the internal pressure relief channel and improves service life.

[0050] like Figures 1-5 As shown, based on the above embodiment, the first connecting part is configured with an internal thread, the second connecting part is configured with an external thread, and the second connecting part can be threadedly connected to the first connecting part.

[0051] In this embodiment, a threaded connection method with internal and external threads is adopted. The structure is mature, the connection is reliable, the sealing is good, and the disassembly and assembly can be completed with only conventional tools, making the operation simple. At the same time, the threaded fit can also provide a certain preload, thereby preventing the plug 140 from loosening under high pressure pulsation and ensuring the stability of long-term operation.

[0052] like Figures 1-5 As shown, based on the above embodiment, the cover 100 is further provided with a high-pressure groove 150 and an outlet 160, and the high-pressure groove 150 and the outlet 160 are connected.

[0053] In this embodiment, a high-pressure groove 150 and an outlet 160 are further integrated on the cover 100, so that the pump cover can simultaneously perform three major functions: low-pressure suction, high-pressure discharge and pressure regulation, thus achieving a high degree of integration of the flow channel.

[0054] In general, such as Figures 1-5 As shown, a pump cover with an integrated pressure relief valve and an electronic oil pump including the pump cover are disclosed. The pump cover includes a cover body 100 and a valve body assembly 200. The cover body 100 integrates a low-pressure groove 110, a valve chamber 120, and a rotor groove 130. The valve chamber 120 is located between the low-pressure groove 110 and the rotor groove 130 and has an open position and a closed position. The valve body assembly 200 includes a movable valve core 210. When the system pressure rises abnormally, the valve core 210 automatically moves to the open position, allowing the low-pressure groove 110 to communicate with the rotor groove 130 through the valve chamber 120 to achieve pressure relief. Under normal operating conditions, the valve core 210 returns to the closed position under the action of elastic force, sealing the valve chamber 120 and maintaining the system's sealing performance. By directly integrating the pressure relief function inside the pump cover, an external pressure relief valve is eliminated, significantly simplifying the structure, reducing the risk of leakage, and improving overall reliability and space utilization.

[0055] Furthermore, the valve chamber 120 is divided into a first channel 121 and a second channel 122, which are interconnected. The valve core 210's movement is concentrated in the smaller diameter second channel 122, optimizing flow channel guidance and enhancing sealing contact pressure. The valve core 210 adopts a spherical structure, resulting in low friction, good sealing performance, and long service life. The spring 220 is fixed in the valve chamber 120 by a detachable threaded plug 140, facilitating assembly and maintenance. Simultaneously, the cover 100 integrates a high-pressure groove 150 and an outlet 160, enabling the pump cover to perform three functions: suction, discharge, and pressure regulation, achieving a highly integrated flow channel design. Based on the above structure, this utility model also provides an electronic oil pump using this pump cover, which has advantages such as compact structure, sensitive response, reliable sealing, and easy maintenance, making it particularly suitable for automotive or industrial hydraulic systems with stringent reliability and space requirements.

[0056] like Figures 1-5As shown, an electronic oil pump includes a pump cover with an integrated pressure relief valve.

Claims

1. A pump cover with an integrated pressure relief valve, characterized in that, include: The cover has a low-pressure groove, a valve chamber and a rotor groove. The valve chamber is located between the low-pressure groove and the rotor groove and has an open position and a closed position. A valve body assembly includes a valve core located within the valve cavity and movable to the open position or the closed position. When the valve core is in the open position, the low-pressure slot communicates with the rotor slot through the valve cavity. When the valve core is in the closed position, the valve cavity is blocked.

2. The pump cover with an integrated pressure relief valve as described in claim 1, characterized in that: The valve chamber includes a first channel and a second channel. The first channel is connected to the second channel and the first channel is connected to the low-pressure groove. The second channel is connected to the rotor groove. The open position and the closed position are both located in the second channel.

3. The pump cover with an integrated pressure relief valve as described in claim 2, characterized in that: The diameter of the second channel is smaller than the diameter of the first channel.

4. The pump cover with an integrated pressure relief valve as described in claim 1, characterized in that: The valve body assembly also includes a spring located inside the valve cavity. The two ends of the spring are connected to the valve core and the cover body, respectively. The spring pushes the valve core to move from the open position to the closed position.

5. The pump cover with an integrated pressure relief valve as described in claim 4, characterized in that: The valve core is configured as a ball.

6. The pump cover with an integrated pressure relief valve as described in claim 4, characterized in that: The cover body is also provided with a plug, and one end of the spring is connected to the cover body through the plug.

7. The pump cover with an integrated pressure relief valve as described in claim 6, characterized in that: The cover body is further provided with a first connecting part, and the plug is provided with a second connecting part. The plug is detachably connected to the first connecting part of the cover body through the second connecting part.

8. The pump cover with an integrated pressure relief valve as described in claim 7, characterized in that: The first connecting part is configured with an internal thread, and the second connecting part is configured with an external thread. The second connecting part can be threadedly connected to the first connecting part.

9. The pump cover with an integrated pressure relief valve as described in claim 1, characterized in that: The cover element is also provided with a high-pressure tank and an outlet, and the high-pressure tank is connected to the outlet.

10. An electronic oil pump, characterized in that, A pump cover including an integrated pressure relief valve as described in any one of claims 1-9.

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