A device for separating lubricating oil contaminants from internal combustion engines

Abstract

The present invention relates to a device for separating lubricating oil contaminants from an internal combustion engine. The device is provided with a filter core at the bottom, and a rotor centrifugal separator driven by the flowing lubricating oil is provided at the top of the filter core. The rotor centrifugal separator and the filter core are arranged up and down in a common, two-body housing that is closed during the operation of the device. The housing is composed of a removable spiral upper cover and a fixed lower shell. A spiral lower cover is arranged in the lower shell between the rotor centrifugal separator and the filter core. The spiral lower cover divides the device into an upper and lower closed cavity. The spiral upper cover and the spiral lower cover are independently connected to the lower shell with threads. The spiral upper cover and the spiral lower cover of the device form a mutually independent closed space, and there is no complex meshing structure between the two. The structure is simple and stable, and the production and processing cost of parts is low. The high-voltage pulse generated in the closed cavity below the spiral lower cover will not be transmitted to the spiral upper cover, and the operation is more stable.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engines, and in particular to a device for separating lubricating oil contaminants from internal combustion engines. Background Art

[0002] At present, many filtering and separation module devices used in the lubrication system of internal combustion engines aim to save the layout space of engine accessories as much as possible. The module device form that integrates centrifugal rotor filters and filter element filters is divided into two cavities independently connected in parallel on a large shell and two upper and lower cavities coaxially arranged in series in a large shell. The coaxial series arrangement is more advantageous in terms of spatial volume as well as in maintenance, assembly and maintenance.

[0003] Chinese patent CN1835785A discloses a device for separating dirt from lubricating oil of an internal combustion engine, wherein the device has a filter core at the bottom and a centrifugal separator located above it with a rotor driven by the flowing lubricating oil, wherein the filter core and the centrifugal separator are arranged in a common, closed, two-body housing in the operation of the device, and the housing is composed of a removable upper screw cover and a fixed lower housing, wherein a removable partition cover is arranged between the filter core and the centrifugal separator in the housing, and the centrifugal separator, the partition cover and the filter core can be taken out of the housing in its open state. In addition, it is stipulated for the device that the screw cover and the partition cover have a detachable connection mechanism that can be meshed with each other for transmitting axial tension or axial tension pressure.

[0004] Chinese patent CN106795784A discloses a device for removing impurities from the lubricating oil of an internal combustion engine, wherein the device has a filter element at the bottom in its working state and a centrifugal separator with a rotatably driven rotor thereon, wherein the filter element and the centrifugal separator are arranged one on top of another in a common two-part housing which is closed during operation of the device and has a removable upper cover and a fixed lower housing part, wherein a removable partition plate which is inserted in a sealed manner is arranged in the housing between the filter element and the centrifugal separator, which separates a lower filter chamber which is under lubricating oil pressure during operation of the device from an upper centrifugal separator chamber which is pressure-free, wherein in the case of a closed cover, the partition plate is radially supported on the cover on the outside, wherein a rotor shaft which rotatably carries the rotor is mounted with its lower end in or on the partition plate, and wherein in the case of an open cover, the rotor, the partition plate with the rotor shaft and the filter element can be removed from the housing. The device according to the invention is characterized in that the cover has a support surface on the inside in its center and that when the cover is closed the rotor shaft is axially supported on the cover with its upper end at the support surface.

[0005] The existing device uses a screw cover and a partition cover with a mutually meshing, detachable connection mechanism to transmit axial tension or axial tension. The meshing structure is relatively complex, and the size control of the screw cover and the partition cover requires high precision. When in working state, and because the cavity under the partition cover is under high pressure pulse and high temperature conditions during operation, the shaft on the partition cover body also limits the rotation of the rotor centrifuge around the axis, and various pulse pressures and radial centrifugal forces will be transmitted to the threads of the screw cover, and the screw cover also needs to withstand the axial tension and radial centrifugal force generated when the rotor centrifuge rotates, which easily causes the partition cover and the screw cover to fail alone or in combination. During maintenance, the screw cover and the partition plate use the meshing structure to simultaneously bring out the rotor centrifuge and the filter element, and the meshing structure also has the risk of breaking, which ultimately causes the engine lubrication system to fail, causing unnecessary losses. Summary of the invention

[0006] The object of the present invention is to provide a device for separating contaminants from lubricating oil of an internal combustion engine in order to solve the above-mentioned problem.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A device for separating lubricating oil contaminants from an internal combustion engine, the device is provided with a filter core at the bottom, and a rotor centrifugal separator driven by the flowing lubricating oil is provided at the top of the filter core, the rotor centrifugal separator and the filter core are arranged in a common, closed, two-body housing in the operation of the device, the housing is composed of a removable spiral upper cover and a fixed lower shell, a spiral lower cover is arranged in the lower shell between the rotor centrifugal separator and the filter core, the spiral lower cover divides the device into an upper and lower closed cavity, and the spiral upper cover and the spiral lower cover are independently connected to the lower shell by threads. Since the spiral upper cover and the spiral lower cover are independently connected to the lower shell by threads, the two form a mutually independent closed space, and there is no complex meshing structure between the two, so that the structure is stable, and the high-voltage pulse generated by the closed cavity below the spiral lower cover will not be transmitted to the spiral upper cover, so that the rotor centrifugal separator is more stable when working.

[0009] Furthermore, the upper end of the rotor centrifugal separator is connected to the spiral upper cover through an upper cover bearing assembly, and the lower end of the rotor centrifugal separator is connected to the spiral lower cover through a lower cover bearing assembly, and the rotor centrifugal separator rotates around an axis formed by the upper cover bearing assembly and the lower cover bearing assembly.

[0010] Furthermore, the upper cover bearing assembly is fixedly connected to the spiral upper cover by means of a snap fastener, and the lower cover bearing assembly is connected to the spiral lower cover by means of a thread.

[0011] Furthermore, the interior of the spiral upper cover is provided with guide ribs for installing the rotor centrifugal separator.

[0012] Furthermore, sealing rings are provided at the threaded connections between the spiral upper cover and the lower shell body, and between the spiral lower cover and the lower shell body.

[0013] Furthermore, the filter core and the spiral lower cover are connected via a detachable connecting mechanism.

[0014] Furthermore, the spiral upper cover and the spiral lower cover are in a bell-shaped shape, and an anti-slip groove is provided on the upper part of the spiral lower cover to prevent the spiral lower cover assembly from falling off and causing damage due to falling when being taken out.

[0015] Furthermore, a flow channel is provided in the middle of the spiral lower cover to connect the upper and lower closed cavities, and an adjustable valve group opening component is provided in the flow channel.

[0016] Furthermore, the valve group opening assembly includes a pressure regulating valve body and a pressure regulating spring connected to the pressure regulating valve body, the outer end of the pressure regulating spring is limited by a limiting screw plug, when the lubricating liquid pressure in the lower closed cavity is greater than the opening pressure of the valve group opening assembly, the upper and lower closed cavities are connected, and the lower lubricating liquid enters the upper rotor centrifugal separator.

[0017] Furthermore, a nozzle for spraying filtered lubricating oil is provided at the lower part of the rotor centrifugal separator, and a reflux channel for recovering filtered lubricating oil is provided in the lower shell.

[0018] Furthermore, the outer hexagonal geometric dimensions of the screw-on cover and the screw-on lower cover are the same, and the screw-on cover and the screw-on lower cover can be easily disassembled and assembled using the same type of sleeve, making maintenance more convenient.

[0019] The specific working principle of the device of the present invention is:

[0020] The upper spiral cover and the lower spiral cover are independently connected to the lower shell with threads, and the device is divided into an upper and a lower closed cavity. The rotor centrifugal separator and the filter core are respectively arranged in the upper and lower closed cavities to filter and separate particles of the lubricating liquid of the internal combustion engine lubrication system. The lubricating liquid enters the shell from the outside, passes through the filter core to complete the particle filtration, and then flows into the middle flow channel to enter the main flow channel of the internal combustion engine. The lower end of the rotor centrifugal separator is inserted into the lower cover bearing assembly, and the spiral upper cover is gradually screwed into the lower shell through the thread. The upper end of the rotor centrifugal separator is gradually inserted into the upper cover bearing assembly through the guide ribs inside the spiral upper cover, thereby forming an upper closed cavity. When the lubricating liquid pressure in the lower closed cavity is greater than the opening pressure of the valve group composed of the pressure regulating valve body and the pressure regulating spring, the flow of the upper and lower closed cavities will be opened, and the lubricating liquid will enter the rotor centrifugal separator upward through the flow channel in the spiral lower cover. The particles in the lubricating liquid are separated from the lubricating liquid by the centrifugal action of the rotor centrifugal separator and adhere to the inner cavity side wall of the rotor centrifugal separator 4. After the particle separation is completed, the lubricating liquid is ejected from the nozzle at the bottom thereof, forming a reaction force, driving the rotor centrifugal separator to rotate around the axis formed by the upper cover bearing assembly and the lower cover bearing assembly, and finally the ejected lubricating liquid flows to the reflux channel of the lower shell to complete the filtering process.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. The spiral upper cover and the spiral lower cover are respectively connected to the shell by threads, and the two form independent closed spaces. There is no complicated meshing structure between the two. They are independently connected to the shell by threads. The structure is simple and stable, and the production and processing cost of parts is relatively low. The high-voltage pulse generated by the closed cavity under the spiral lower cover will not be transmitted to the spiral upper cover, making the rotor centrifugal separator more stable during operation.

[0023] 2. When removing the spiral upper cover, the rotor centrifugal separator can be replaced independently without rotating the spiral lower cover and filter element assembly together, saving disassembly and assembly space.

[0024] 3. The outer hexagonal geometric dimensions of the screw upper cover and the screw lower cover are the same. The same type of sleeve can be used to easily disassemble and assemble the screw upper cover and the screw lower cover, making maintenance more convenient.

[0025] 4. There are anti-slip grooves in the upper area of ​​the screw lower cover to prevent it from falling off and causing damage when taking out the screw lower cover assembly.

[0026] 5. According to the engine lubrication system pressure and customer needs, the corresponding pressure regulating spring can be selected to adjust the opening pressure of the rotor centrifugal separator to ensure the oil pressure of each lubrication point in the internal combustion engine lubrication system.

[0027] 6. A rotor centrifugal separator can be optionally installed. According to the needs, you only need to replace the spiral lower cover, remove the spiral upper cover and the rotor centrifugal separator to form a modular device with filtering function. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a partial structural schematic diagram of the device of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the device of the present invention when the spiral upper cover and the lower shell are separated;

[0030] Figure 3 It is a schematic diagram of the structure of the device of the present invention without a rotor centrifugal separator;

[0031] Figure 4 It is a schematic diagram of the structure of the device of the present invention having a filter element alone;

[0032] In the figure: 1-upper cover bearing assembly; 2-spiral upper cover; 3-rotor centrifugal separator; 4-lower cover bearing assembly; 5-limiting screw plug; 6-pressure regulating spring; 7-pressure regulating valve body; 8-filter core; 9-spiral lower cover; 10-anti-slip groove; 11-lower shell; 12-nozzle; 13-reflux channel; 14-guide rib. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example

[0035] A device for separating contaminants from lubricating oil of an internal combustion engine, referring to Figure 1-3 The device is provided with a filter core 8 at the bottom, and a rotor centrifugal separator 3 driven by the flowing lubricating oil is provided at the upper part of the filter core 8. The rotor centrifugal separator 3 and the filter core 8 are arranged up and down in a common, two-body housing that is closed during the operation of the device. The housing consists of a removable screw upper cover 2 and a fixed lower shell 11. A screw lower cover 9 is arranged between the rotor centrifugal separator 3 and the filter core 8 in the lower shell 11. The screw lower cover 9 divides the device into an upper and a lower closed cavity. The filter core 8 is located in the lower closed cavity, and the rotor centrifugal separator 3 is located in the upper closed cavity. The filter core 8 and the screw lower cover 9 are connected by a detachable connecting mechanism for easy disassembly.

[0036] In order to solve the problem that the meshing structure of the screw cover and the diaphragm cover in the existing device is relatively complex, the size control of the screw cover and the diaphragm cover requires high precision, and the diaphragm cover and the screw cover alone or in combination are easily failed during operation, the present device adopts a method in which the screw upper cover 2 and the screw lower cover 9 are independently and threadedly connected to the lower shell 11. The screw upper cover 2 and the screw lower cover 9 are independently and threadedly connected to the lower shell 11 to form a mutually independent closed space without a complex meshing structure, thereby ensuring a stable structure, and the high-voltage pulse generated by the closed cavity below the screw lower cover 9 will not be transmitted to the screw upper cover 2, thereby making the rotor centrifugal separator more stable during operation.

[0037] Furthermore, in the present device, the upper end of the rotor centrifugal separator 3 is connected to the spiral upper cover 2 through the upper cover bearing assembly 1, and the lower end of the rotor centrifugal separator 3 is connected to the spiral lower cover 9 through the lower cover bearing assembly 4. The rotor centrifugal separator 3 rotates around the axis formed by the upper cover bearing assembly 1 and the lower cover bearing assembly 4. The upper cover bearing assembly 1 and the lower cover bearing assembly 4 can be arranged with bearing structures commonly used in the art. The upper cover bearing assembly 1 and the spiral upper cover 2 are fixedly connected by snaps for easy disassembly, and the lower cover bearing assembly 4 and the spiral lower cover 9 are threadedly connected.

[0038] In order to securely install, the spiral upper cover 2 is provided with a guide rib 14 for installing the rotor centrifugal separator 3, which can play a role in stabilizing operation during operation. To ensure good sealing, the spiral upper cover 2 and the lower shell 11, as well as the spiral lower cover 9 and the lower shell 11, are provided with sealing rings at the threaded connection.

[0039] The upper spiral cover 2 and the lower spiral cover 9 are in a bell-shaped configuration. The upper portion of the lower spiral cover 9 is provided with an anti-slip groove 10 to prevent the lower spiral cover assembly from falling off and causing damage when the lower spiral cover assembly is taken out.

[0040] The upper and lower sealed cavities of the device can be interconnected to increase the filtering and processing capacity of the device. A flow channel is provided in the middle of the spiral lower cover 9, and an adjustable valve group opening component is provided in the flow channel. The valve group opening component includes a pressure regulating valve body 7 and a pressure regulating spring 6 connected to the pressure regulating valve body 7. The outer end of the pressure regulating spring 6 is limited by a limiting screw plug 5. When the lubricating liquid pressure in the lower closed cavity is greater than the opening pressure of the valve group opening component, the pressure regulating valve body 7 moves to the right, the channel opens, the upper and lower closed cavities are connected, and the lower lubricating liquid enters the upper rotor centrifugal separator 3, and the lubricating oil is processed by the rotor centrifugal separator 3. The lower part of the rotor centrifugal separator 3 is provided with a nozzle 12 for spraying filtered and filtered lubricating oil. When the nozzle 12 sprays the oil, it drives the rotor centrifugal separator 3 to rotate. The lower shell 11 is provided with a reflux channel 13 for recovering the filtered lubricating oil, so that the clean oil flows into the engine.

[0041] In addition, a rotor centrifugal separator can be optionally installed. According to the needs, only the lower spiral cover 9 needs to be replaced, and the upper spiral cover 2 and the rotor centrifugal separator 3 need to be removed to form a modular device with filtering function, such as Figure 4 shown.

[0042] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A device for separating lubricating oil contaminants from an internal combustion engine, the device comprising a filter core (8) at the bottom, a rotor centrifugal separator (3) driven by the flowing lubricating oil at the top of the filter core (8), the rotor centrifugal separator (3) and the filter core (8) being arranged in a common two-body housing which is closed during operation of the device, the housing comprising a removable screw upper cover (2) and a fixed lower housing (11), a screw lower cover (9) being arranged in the lower housing (11) between the rotor centrifugal separator (3) and the filter core (8), the screw lower cover (9) dividing the device into an upper and a lower sealed chamber, characterized in that: The screw upper cover (2) and the screw lower cover (9) are respectively and independently connected to the lower shell body (11) by threading; The upper end of the rotor centrifugal separator (3) is connected to the spiral upper cover (2) via an upper cover bearing assembly (1), and the lower end of the rotor centrifugal separator (3) is connected to the spiral lower cover (9) via a lower cover bearing assembly (4); the rotor centrifugal separator (3) rotates around an axis formed by the upper cover bearing assembly (1) and the lower cover bearing assembly (4); A flow channel is provided in the middle of the spiral lower cover (9) for connecting the upper and lower closed cavities, and an adjustable valve group opening component is provided in the flow channel; the valve group opening component comprises a pressure regulating valve body (7) and a pressure regulating spring (6) connected to the pressure regulating valve body (7), and the outer end of the pressure regulating spring (6) is limited by a limit screw plug (5); a nozzle (12) for spraying filtered lubricating oil is provided at the lower part of the rotor centrifugal separator (3), and a reflux channel (13) for recovering the filtered lubricating oil is provided in the lower shell (11); When the lubricating liquid pressure in the lower sealed cavity is greater than the opening pressure of the valve group composed of the pressure regulating valve body (7) and the pressure regulating spring (6), the flow channels of the upper and lower sealed cavities will be opened, and the lubricating liquid will enter the rotor centrifugal separator (3) through the flow channel in the spiral lower cover (9). The particles in the lubricating liquid are separated from the lubricating liquid under the centrifugal action and adhere to the inner cavity side wall of the rotor centrifugal separator (3). After the particle separation is completed, the lubricating liquid is sprayed out from the nozzle (12), forming a reaction force, driving the rotor centrifugal separator (3) to rotate around the axis formed by the upper cover bearing assembly (1) and the lower cover bearing assembly (4), and finally the sprayed lubricating liquid flows into the reflux channel (13) of the lower shell body, completing the filtering process.

2. A device for separating lubricating oil contaminants from an internal combustion engine according to claim 1, characterized in that: The upper cover bearing assembly (1) and the spiral upper cover (2) are fixedly connected by means of buckles, and the lower cover bearing assembly (4) and the spiral lower cover (9) are connected by means of threads.

3. The device for separating lubricating oil contaminants from an internal combustion engine according to claim 1, characterized in that: The interior of the spiral upper cover (2) is provided with guide ribs (14) for installing the rotor centrifugal separator (3).

4. The device for separating lubricating oil contaminants from an internal combustion engine according to claim 1, characterized in that: The screw upper cover (2) and the lower shell (11), as well as the screw lower cover (9) and the lower shell (11), are both provided with sealing rings at the threaded connections.

5. The device for separating lubricating oil contaminants from an internal combustion engine according to claim 1, characterized in that: The filter core (8) and the screw lower cover (9) are connected via a detachable connecting mechanism.

6. The device for separating lubricating oil contaminants from an internal combustion engine according to claim 1, characterized in that: The spiral upper cover (2) and the spiral lower cover (9) are in a bell-shaped shape, and an anti-slip groove (10) is provided on the upper part of the spiral lower cover (9).

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