Feed pump

Abstract

The present application discloses a feed pump, including a rotating shaft that can rotate around its own axis, at least two cams arranged on the rotating shaft, a first feeding system for supplying a first material to a first material chamber, a second feeding system for supplying a second material to a second material chamber, a first movable part that can enter the first material chamber along a first through hole, and a second movable part that can enter the second material chamber along a second through hole; the first movable part and the second movable part are respectively in contact with the outer wheel surface of a cam; because the cam has a high point, the rotating shaft rotates and drives the cam to rotate, and when the high point contacts the first movable part or the second movable part, at least part of the first movable part or at least part of the second movable part extends into the corresponding material chamber to process the material in the material chamber. By setting cams with high points in different positions and numbers, one rotating shaft can realize the independent movement of multiple movable parts, thereby realizing the processing of materials in different material chambers.

Description

Technical Field

[0001] The present application relates to the technical field of pumps, and in particular to a feed pump. Background Art

[0002] In order to achieve efficient driving, existing vehicles or engines are generally equipped with a dual-fuel injection device, which realizes the separate supply of two fuels by independently injecting high-pressure fuel and hydraulic oil.

[0003] In order to achieve high-pressure injection of two fuels, two sets of pressure sources are provided in the injection device, such as a high-pressure pump, which is used as the pressure source of the high-pressure fuel injection system, and a hydraulic pump, which is used as the pressure source of the hydraulic system.

[0004] This type of injection device has a complex structure, occupies a large space and is costly. Summary of the invention

[0005] The purpose of the present application is to overcome the deficiencies in the prior art and provide a feed pump.

[0006] To achieve the above technical objectives, the present application provides a feed pump, comprising: a rotating shaft capable of rotating around its own axis; at least two cams arranged on the rotating shaft at intervals along the axis direction of the rotating shaft; a first feeding system connected to the first material chamber and capable of supplying the first material to the first material chamber; a second feeding system connected to the second material chamber and capable of supplying the second material to the second material chamber; a first movable member, a first through hole is provided on the first material chamber, one end of the first movable member is penetrated through the first through hole, and the other end of the first movable member contacts one cam; a second movable member, a second through hole is provided on the second material chamber, one end of the second movable member is penetrated through the second through hole, and the other end of the second movable member contacts another cam; wherein any cam has at least one high point, and any cam has a first state and a second state; when the rotating shaft rotates and drives the cam to be in the first state, the high point is away from the first movable member or the second movable member; when the rotating shaft rotates and drives the cam to be in the second state, the high point contacts the first movable member or the second movable member, so that at least part of the first movable member extends into the first material chamber, or at least part of the second movable member extends into the second material chamber.

[0007] Further, the feed pump also includes: a first transmission mechanism, including a first transmission member and a first elastic member, the first transmission member contacts a cam, and the first elastic member is connected to the first movable member; when the cam is in the second state, the high point contacts the first transmission member, so that the first transmission member drives the first movable member to move along the first through hole toward the inside of the first material chamber, and the first elastic member is compressed; when the cam is in the first state, the high point is away from the first transmission member, and the first elastic member is restored, so that the first transmission member is against the cam; and / or, a second transmission mechanism, including a second transmission member and a second elastic member, the second transmission member contacts another cam, and the second elastic member is connected to the second movable member; when the cam is in the second state, the high point contacts the second transmission member, so that the second transmission member drives the second movable member to move along the second through hole toward the inside of the second material chamber, and the second elastic member is compressed; when the cam is in the first state, the high point is away from the second transmission member, and the second elastic member is restored, so that the second transmission member is against the cam.

[0008] Furthermore, one cam has at least one high point which is located at a different position from the high point of the other cam, and when the rotating shaft rotates by a certain angle, the high point of one cam contacts the first movable part, and the high point of the other cam is away from the second movable part; or, one cam has at least one high point which is located at the same position as the high point of the other cam, and when the rotating shaft rotates by a certain angle, the high point of one cam contacts the first movable part, and the high point of the other cam contacts the second movable part.

[0009] Furthermore, the first feeding system includes: a first material box, used to store the first material and connected to the first material cavity through a first pipeline; a first feed pump, arranged at the feed end of the first pipeline, capable of drawing the first material in the first material box into the first pipeline; a first flow valve, arranged in the first pipeline, capable of controlling the flow in the first pipeline; a first discharge valve, arranged at the discharge end of the first pipeline, capable of controlling the circulation of the first material.

[0010] Furthermore, the first feeding system also includes a first coarse filter, which is arranged in the first pipeline and can filter impurities in the first material.

[0011] Furthermore, the first feeding system also includes a first fine filter, which is arranged in the first pipeline and downstream of the first coarse filter, and can further filter impurities in the first material.

[0012] Furthermore, the first feeding system also includes an overflow valve, which is arranged in the first pipeline and upstream of the first discharge valve; when the pressure in the first pipeline is greater than a preset pressure, part of the first material is discharged through the overflow valve.

[0013] Further, the overflow valve is connected to the first material box; or, the overflow valve is connected to the rotating shaft.

[0014] Furthermore, the feed pump also includes: a first material receiving system, connected to the first material chamber; after the first movable part enters the first material chamber, the pressure of the first material in the first material chamber increases, and the pressurized first material enters the first material receiving system; and / or, a second material receiving system, connected to the second material chamber; after the second movable part enters the second material chamber, the pressure of the second material in the second material chamber increases, and the pressurized second material enters the second material receiving system.

[0015] Further, the first material receiving system includes: a first material receiving valve, connected to the first material chamber; a first oil rail, connected to the first material receiving valve and capable of receiving the pressurized first material; and / or, the second material receiving system includes: a second material receiving valve, connected to the second material chamber; a second oil rail, connected to the second material receiving valve and capable of receiving the pressurized second material.

[0016] The present application provides a feed pump, including a rotating shaft that can rotate around its own axis, at least two cams arranged on the rotating shaft, a first feeding system for supplying the first material to the first material chamber, a second feeding system for supplying the second material to the second material chamber, a first movable part that can enter the first material chamber along the first through hole, and a second movable part that can enter the second material chamber along the second through hole; the first movable part and the second movable part are respectively in contact with the outer wheel surface of a cam; because the cam has a high point, the rotating shaft rotates and drives the cam to rotate, and when the high point contacts the first movable part or the second movable part, at least part of the first movable part or at least part of the second movable part extends into the corresponding material chamber to process the material in the material chamber. By setting cams with different positions and numbers of high points, one rotating shaft can realize the independent movement of multiple movable parts, thereby realizing the processing of materials in different material chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a feed pump provided in this application;

[0018] Figure 2 for Figure 1 A magnified view of the dotted line portion;

[0019] Figure 3 for Figure 2 Schematic diagram of another state of the structure;

[0020] Figure 4 for Figure 1 Enlarged view of the dotted line portion in B. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] Reference Figure 1 The present application provides a feeding pump, comprising: a rotating shaft 1, which can rotate around its own axis; at least two cams 2, which are arranged on the rotating shaft 1 along the axial direction of the rotating shaft 1 and at intervals; a first feeding system 10, which is connected to the first material chamber 3 and can supply the first material to the first material chamber 3; a second feeding system 20, which is connected to the second material chamber 4 and can supply the second material to the second material chamber 4; a first movable member 5, a first through hole is provided on the first material chamber 3, one end of the first movable member 5 is penetrated through the first through hole, and the other end of the first movable member 5 contacts one cam 2; a second movable member 6, a second through hole is provided on the second material chamber 4, one end of the second movable member 6 is penetrated through the second through hole, and the other end of the second movable member 6 contacts another cam 2.

[0028] It can be seen that when the rotating shaft 1 is controlled to rotate around its own axis, all the cams 2 are driven to rotate at the same time. The end of the first movable member 5 away from the first material cavity 3 contacts the outer wheel surface of one of the cams 2, and the end of the second movable member 6 away from the second material cavity 4 contacts the outer wheel surface of another cam 2. Since the outer diameter of the cam 2 is variable, when the cam 2 rotates to a position where its outer diameter is larger and contacts the movable member (the first movable member 5 or the second movable member 6), the movable member is subjected to a force moving toward the inside of the material cavity (the first material cavity 3 or the second material cavity 4); the cam 2 continues to rotate, and as the position where its outer diameter is larger gradually moves away from the movable member, the movable member gradually moves away from the material cavity.

[0029] It should be added that, since the cam 2 is affected by the rotating shaft 1 to make a rotational motion, when the movable part is affected by the cam 2 to move, in addition to having a tendency to move closer to or away from the rotating shaft 1 , it also has a tendency to rotate with the cam 2 .

[0030] In order to prevent the movable part from rotating with the cam 2, the first through hole and the second through hole can be arranged to point to the axis of the rotating shaft 1. Take the first through hole as an example for explanation. The first movable part 5 is arranged in the first through hole. Since the first through hole has a guiding function, when the first movable part 5 moves, it can only approach or move away from the rotating shaft 1 along the first through hole. Since the first through hole points to the axis of the rotating shaft 1, the extension direction of the first through hole is the direction of the centripetal force when the rotating shaft 1 rotates. When the cam 2 rotates with the rotating shaft 1, the cam 2 has a radial component and a normal component. The normal component makes the first movable part 5 move along the first through hole, and the radial component is blocked by the hole wall of the first through hole. Therefore, the setting of the first through hole can limit the movement direction of the first movable part 5. At this time, when the first movable part 5 is close to the rotating shaft 1, the first movable part 5 is away from the first material cavity 3; when the first movable part 5 is away from the rotating shaft 1, the first movable part 5 is close to the first material cavity 3.

[0031] Preferably, to ensure that the first movable member 5 moves along the first through hole, the end of the first movable member 5 away from the cam 2 will not leave the first through hole. To this end, in some embodiments, a limiting device may be provided for the first movable member 5 to limit the extent to which the first movable member 5 moves away from the first material cavity 3, ensuring that at least the end of the first movable member 5 that is used to extend into the first material cavity 3 will not escape from the first through hole. For example, a limiting block may be provided at one end of the first through hole away from the first material cavity 3, and as the first movable member 5 moves away from the first material cavity 3, the first movable member 5 will be stopped by the limiting block, thereby ensuring that the first movable member 5 always moves along the first through hole.

[0032] The first movable member 5 and the second movable member 6 may be of a rod-shaped structure or a columnar structure. To facilitate the movable member to move in the through hole (the first through hole or the second through hole) and to avoid the movable member and the through hole from rubbing against each other and wearing each other's structure, the movable member may be of a columnar shape.

[0033] It should be explained that the outer diameter of the cam 2 refers to the distance from its outer wheel surface to the axis of the rotating shaft 1. Therefore, the position of the cam 2 with a larger outer diameter is farther from the axis of the rotating shaft; at this time, this position is closer to the corresponding material cavity than other positions with smaller outer diameters. When the position of the cam 2 with a larger outer diameter contacts the movable part, the movable part moves toward the material cavity with a large amplitude. When the cam 2 continues to rotate, as the outer diameter of the position where it contacts the movable part becomes smaller and smaller, the movable part moves away from the material cavity. When the cam 2 continues to rotate, as the position where it has a larger outer diameter continues to approach the movable part, the outer diameter of the position where it contacts the movable part becomes larger and larger, and the movable part moves closer to the material cavity.

[0034] It is also necessary to explain that the high point of the cam 2 is the position where the outer diameter of the cam 2 is larger. When the cam 2 rotates and the high point on it approaches the movable part, the movable part moves toward the material cavity along the corresponding through hole; when the cam 2 continues to rotate and the high point on it moves away from the movable part, the movable part moves away from the material cavity along the corresponding through hole.

[0035] To facilitate the moving part to enter or leave the high point along the outer wheel surface of cam 2, the high point of cam 2 can be composed of two ramps facing opposite directions. The ramp is an inclined surface or curved surface extending obliquely. The two ramps at the same high point can be arranged radially or have different slopes or lengths. For example, referring to Figure 2 and Figure 3 , the cam 2 rotates clockwise, and as the high point approaches the first movable part 5, the first movable part 5 moves up along the right ramp of the high point until it reaches the highest position of the high point; then, the first movable part 5 moves down along the left ramp of the high point until it leaves the high point. The provision of the ramp is conducive to guiding the stable movement of the movable part, and avoids the movable part being stuck at the high point and unable to move up when the high point is vertically or approximately vertically set on the outer wheel surface of the cam 2, or the movable part directly falling from the highest position of the high point, thereby damaging its own structure.

[0036] Furthermore, a connecting bridge can be provided between the two ramps at the high point of the cam 2, and the outer diameter of the outer wheel surface where the connecting bridge is located remains unchanged. When the movable part moves to the connecting bridge, the cam 2 continues to rotate, and the movable part moves along the connecting bridge. At this time, the movable part remains in the state of extending into the material cavity. By adjusting the length of the connecting bridge, the length of time that the movable part extends into the material cavity can be controlled.

[0037] Specifically, any cam 2 has at least one high point, and any cam 2 has a first state and a second state. When the rotating shaft 1 rotates and drives the cam 2 to be in the first state, the high point is away from the first movable member 5 or the second movable member 6; when the rotating shaft 1 rotates and drives the cam 2 to be in the second state, the high point contacts the first movable member 5 or the second movable member 6, so that at least part of the first movable member 5 extends into the first material cavity 3, or at least part of the second movable member 6 extends into the second material cavity 4.

[0038] In one embodiment, by extending the movable member into the material cavity, the effective space in the material cavity can be adjusted, thereby achieving pressurization of the material (the first material or the second material).

[0039] Specifically, when the cam 2 is in the first state, the high point is away from the first movable member 5 or the second movable member 6, and the volume of the first material cavity 3 or the second material cavity 4 is V1; when the cam 2 is in the second state, since the high point contacts the first movable member 5 or the second movable member 6, at least part of the first movable member 5 extends into the first material cavity 3, or at least part of the second movable member 6 extends into the second material cavity 4, the volume of the first material cavity 3 or the second material cavity 4 is V2. Among them, V1 is greater than V2.

[0040] It can be seen that after a certain amount of material enters the cavity, it can originally occupy a space of size V1. Assuming that the material is in a relatively balanced state at this time, as the internal space of the cavity decreases, the material is compressed, the internal stress between molecules increases, and finally the material pressure in the cavity increases.

[0041] It should be added that when the cam 2 is in the first state, the movable part can be completely separated from the material cavity, so that the space in the material cavity is completely used to receive the material. Alternatively, when the cam 2 is in the first state, part of the movable part is still in the material cavity; at this time, affected by the high point of the cam 2, the movable part will further extend into the material cavity, thereby occupying more internal space of the material cavity, which can also reduce the volume of the material cavity.

[0042] In order to improve the efficiency of pressurizing the material, preferably, when the cam 2 is in the first state, part of the movable parts are still in the material cavity. At this time, at least part of the movable parts are always in the material cavity. On the one hand, it can reduce the surface area of ​​the movable parts entering the material cavity when the cam 2 is in the second state, avoiding excessive material from adhering to the surface of the movable parts, and on the other hand, it can improve the response speed of the movable parts.

[0043] In this embodiment, the volume of material supplied to the material chamber is preferably V1; in this way, each time the material is loaded, the material chamber can be just filled. Of course, in some embodiments, the volume of material supplied to the material chamber may be smaller than V1, but the volume of material supplied to the material chamber needs to be larger than V2. Alternatively, when the material is compressible, the volume of material supplied to the material chamber may also be larger than V1. In any case, as the movable part is extended, the internal space of the material chamber is reduced, the material is compressed, and its pressure becomes larger. In other words, by extending the movable part, the material in the material chamber can be pressurized.

[0044] For example, the feed pump provided in the present application can be applied to an internal combustion engine.

[0045] In a specific embodiment, the first material is fuel (such as diesel) and the second material is engine oil. At this time, the first material is used to be input into the engine for combustion, and the second material is used to be input into the hydraulic system and used as a power source. At this time, after the first material enters the first material chamber 3, the first movable member 5 extends into the first material chamber 3, so that the first material in the first material chamber 3 is pressurized, so that the high-pressure fuel is sprayed into the engine. Similarly, after the second material enters the second material chamber 4, the second movable member 6 extends into the second material chamber 4, so that the second material in the second material chamber 4 is pressurized, so that the high-pressure engine oil is sprayed into the hydraulic system.

[0046] In other embodiments, the movable member is inserted into the material cavity, so that the material in the material cavity can be stirred, heated, etc. The present application does not limit the purpose of setting the movable member to extend into the material cavity.

[0047] It should be added that any cam 2 can have multiple high points, so that when the shaft 1 rotates 360°, the movable part can achieve multiple reciprocating movements. According to the required movement frequency and movement amplitude of the movable part, by controlling the number, interval and outer diameter of the high points, the required adjustment can be completed without changing the movement speed of the shaft 1. This facilitates the control of the processing of materials in different material chambers.

[0048] It should also be added that one cam 2 has at least one high point that is located at a different position from the high point of the other cam 2. When the rotating shaft 1 rotates a certain angle, the high point of one cam 2 contacts the first movable part 5, and the high point of the other cam 2 is away from the second movable part 6; or, one cam 2 has at least one high point that is located at the same position as the high point of the other cam 2. When the rotating shaft 1 rotates a certain angle, the high point of one cam 2 contacts the first movable part 5, and the high point of the other cam 2 contacts the second movable part 6.

[0049] For example, the feed pump provided in the present application is used to achieve pressurized output of two materials. After the two materials are pressurized, they are input into the same working equipment, and the working equipment needs to receive the two materials separately. For this reason, the positions of the high points on the two cams 2 are completely different. At this time, no matter to what angle the rotating shaft 1 rotates, the high points of the two cams 2 will not contact the corresponding movable parts at the same time. Thereby ensuring that when one material is pressurized and output, the other material is waiting to be pressurized. Among them, when the number of high points of the two cams 2 is the same, the two materials are alternately pressurized and output. When the two cams 2 have different numbers of high points, one of the materials can be pressurized and output continuously at least twice.

[0050] For another example, the feed pump provided in the present application is used to achieve pressurized output of two materials. The two materials are input into different working equipment. Due to the inconsistent working rhythm of the working equipment, one receives the pressurized material quickly, and the other receives the pressurized material slowly. However, after the two working equipment have worked for a certain period of time, they will receive materials at the same time. At this time, the above-mentioned "certain period of time" can be set to the time for the rotating shaft 1 to rotate 360°; in this way, every time the rotating shaft 1 rotates to 360°, there will be a high point on the two cams 2 that is in the same position and contacts with the corresponding movable parts at the same time, completing the pressurization of the material. However, there are other high points on the two cams 2, and the positions of the other high points are different.

[0051] It should be explained that the "position of the high point" described in the present application is not the determined position of the high point in physical space, but is mainly used to express the relative position of the high point on the cam 2 and the corresponding movable part. When the high points of different cams 2 are at the same position, the shaft 1 rotates a certain angle, and the high points of different cams 2 can contact the corresponding movable parts at the same time. When the high points of different cams 2 are at different positions, the shaft 1 rotates a certain angle, and the high point of one cam 2 can contact the corresponding movable part, but the high point of another cam 2 does not contact the corresponding movable part.

[0052] By adjusting the position of the high point on the cam 2, multiple materials can be processed simultaneously, or multiple materials can be processed separately.

[0053] It should also be added that, according to the type and quantity of materials required in the actual working equipment, more cams 2 can be set on the rotating shaft 1, and correspondingly, the feeding pump also includes more material chambers. Therefore, by setting the high point on the cam 2, different materials can be processed at different times through the same driving source (i.e., the rotating shaft 1), or different processing times of different materials can be further achieved.

[0054] In some embodiments, the feed pump provided in the present application can also be used to process the same material. For example, by setting a feed pump, the same material is passed to different working equipment after different processing, or the same material is passed to the same working equipment after different processing, etc. The details are not repeated here.

[0055] To prevent the movable parts from directly contacting the cam and wearing each other, the feed pump also includes: a first transmission mechanism 30, including a first transmission member 31, connecting the first movable part 5 and a cam 2; and / or, a second transmission mechanism 40, including a second transmission member 41, connecting the second movable part 6 and another cam 2.

[0056] The first transmission mechanism 30 is taken as an example for description.

[0057] Reference Figures 2 to 4 , the first transmission member 31 contacts the outer wheel surface of the cam 2, and when the cam 2 rotates, the first transmission member 31 moves along the outer wheel surface of the cam 2. Since the outer wheel surface of the cam 2 is an irregular curved surface, in order to facilitate the movement of the first transmission member 31, at least the surface of the first transmission member 31 used to contact the outer wheel surface of the cam 2 is an arc surface, thereby reducing the relative friction between the first transmission member 31 and the outer wheel surface of the cam 2 when the first transmission member 31 moves along the outer wheel surface of the cam 2, thereby protecting the structures of the two.

[0058] Furthermore, the first transmission member 31 can be set as a member with a circular cross-section such as a sphere or a cylinder. When the cam 2 rotates, it has a radial component and a normal component. Under the influence of the radial component, the first transmission member 31 has a tendency to move along the tangential direction. Under the influence of the normal component, the first transmission member 31 has a tendency to approach or move away from the axis of the rotating shaft 1. The reciprocating motion of the first transmission member 31 approaching or moving away from the rotating shaft 1 is the motion required by the movable part, which can drive the movable part to move relative to the material chamber; however, the motion of the first transmission member 31 along the tangential direction will be restricted, thereby increasing the relative friction between the first transmission member 31 and the cam 2. The first transmission member 31 is set to be spherical. When the cam 2 rotates, the first transmission member 31 rotates under force, thereby avoiding high-intensity wear.

[0059] Furthermore, when the cross-section of the first transmission member 31 is circular, in order to prevent the first transmission member 31 from being affected by the cam 2 and moving in the tangential direction, a mounting block 7 can be provided at the end of the first movable member 5 away from the first material chamber 3. The surface of the mounting block 7 close to the first transmission member 31 has an arc-shaped groove, and part of the first transmission member 31 is arranged in the arc-shaped groove. The arc-shaped groove will not interfere with the rotation of the first transmission member 31, but can limit the outward movement of the first transmission member 31, thereby improving the transmission stability of the first transmission mechanism 30.

[0060] In addition, the first transmission member 31 is arranged in the arc groove, the position of the arc groove opening end is lower than the position of the center of the cross section of the first transmission member 31, and the opening distance of the arc groove opening end is smaller than the diameter of the cross section of the first transmission member 31. Figure 2 At this time, most of the first transmission member 31 is arranged in the arc-shaped groove, which can better limit the position and movement of the first transmission member 31.

[0061] To ensure that the first transmission member 31 contacts the outer wheel surface of the cam 2, the first transmission mechanism 30 also includes a first elastic member 32 connected to the first movable member 5; when the cam 2 is in the second state, the high point contacts the first transmission member 31, so that the first transmission member 31 drives the first movable member 5 to move along the first through hole toward the inside of the first material cavity 3, and the first elastic member 32 is compressed; when the cam 2 is in the first state, the high point is away from the first transmission member 31, and the first elastic member 32 is restored, so that the first transmission member 31 is against the cam 2.

[0062] And / or, the second transmission mechanism 40 also includes a second elastic member 42, which is connected to the second movable member 6; when the cam 2 is in the second state, the high point contacts the second transmission member 41, so that the second transmission member 41 drives the second movable member 6 to move along the second through hole toward the inside of the second material chamber 4, and the second elastic member 42 is compressed; when the cam 2 is in the first state, the high point is away from the second transmission member 41, and the second elastic member 42 is restored, so that the second transmission member 41 is against the cam 2.

[0063] The first transmission mechanism 30 is continued to be described as an example.

[0064] The first elastic member 32 is disposed between the first transmission member 31 and the outer wall of the first material chamber 3, one end of the first elastic member 32 is fixedly disposed, and the other end is connected to the first transmission member 31. At the same time, since the first transmission member 31 extends along its movement direction, the first elastic member 32 is sleeved on the first transmission member 31, and the first transmission member 31 can limit the deformation direction of the first elastic member 32.

[0065] Since the first elastic member 32 has elastic force, when the high point contacts the first transmission member 31, the first transmission member 31 drives the first movable member 5 to move toward the first material chamber 3, and the first movable member 5 compresses the first elastic member 32. The elastic force generated by the deformation of the first elastic member 32 acts in the opposite direction on the first movable member 5, so that the first movable member 5 has a tendency to approach the cam 2, and then the first transmission member 31 presses the outer wheel surface of the cam 2. When the high point leaves the first transmission member 31, the first elastic member 32 gradually recovers, and the elastic force generated by the recovery acts on the first movable member 5, so that the first transmission member 31 can always press the outer wheel surface of the cam 2.

[0066] To ensure that the first transmission member 31 can always press the outer wheel surface of the cam 2, regardless of whether the high point contacts the first transmission member 31, the first elastic member 32 is always in a pre-tightened state. In this state, the first elastic member 32 is compressed and has a tendency to expand outward.

[0067] By setting the first elastic member 32, when the cam 2 rotates and its high point contacts the first transmission member 31, the high point elastically contacts the first transmission member 31; similarly, when the cam 2 rotates and the first transmission member 31 leaves the high point, the first transmission member 31 elastically contacts the non-high point position. In this way, on the one hand, it can ensure that the first transmission member 31 is always pressed against the cam 2, and on the other hand, when the size of the outer wheel surface of the cam 2 changes, it can avoid the first transmission member 31 from hitting the cam, thereby protecting the structures of the two.

[0068] The first elastic member 32 may be a spring, or a flexible member made of flexible materials such as rubber and plastic.

[0069] It is easy to understand that the structure of the second transmission mechanism 40 is similar to that of the first transmission mechanism 30, and the details are not repeated here.

[0070] Specifically, the first feeding system 10 includes: a first material box 11, which is used to store the first material and is connected to the first material chamber 3 through a first pipeline; a first feed pump 12, which is arranged at the feed end of the first pipeline and can draw the first material in the first material box 11 into the first pipeline; a first flow valve 13, which is arranged in the first pipeline and can control the flow in the first pipeline; a first discharge valve 14, which is arranged at the discharge end of the first pipeline and can control the circulation of the first material.

[0071] Among them, the first material box 11 is a storage box, which stores the first material and is used to supply the first material to the first material chamber 3 as needed. The first pipeline connects the first material box 11 and the first material chamber 3, and the first material can be input into the first material chamber 3 through the first pipeline. The first feed pump 12 can be a pressure pump, similar to a water pump, which can extract the first material in the first material box 11, pump it into the first pipeline, and then output it to the first material chamber 3. According to the volume of the first material chamber 3, or according to the preset supply amount of the first material, it is necessary to control the flow of the material flowing into the first material chamber 3, therefore, a first flow valve 13 is provided. Before the first material enters the first material chamber 3, it is necessary to close the first pipeline to prevent the material from being affected by external forces and flowing back to the first pipeline, thereby affecting the final processing effect, therefore, a first discharge valve 14 is provided.

[0072] Therefore, when the first material is loaded, the first discharge valve 14 is opened, the first feed pump 12 works, extracts the first material in the first material box 11, and makes the first material flow to the first material chamber 3 along the first pipeline, and the first flow valve 13 controls the output of the first material, so that the required amount of the first material flows into the first material chamber 3. Subsequently, the first discharge valve 14 is closed, the rotating shaft 1 rotates, driving the cam 2 to rotate, so that the high point of the cam 2 contacts the first movable part 5, and the first movable part 5 extends into the first material chamber 3, so as to realize the processing of the first material.

[0073] Furthermore, the first feeding system 10 also includes a first coarse filter 15, which is arranged in the first pipeline and can filter impurities in the first material.

[0074] It is easy to understand that when the material contacts the external environment, it is easy to be mixed with impurities. At the same time, there may also be impurities inside the first material box 11. When the impurity particles are large, on the one hand, it will affect the actual flow rate of the first material finally output by the first feeding system 10, and on the other hand, the impurities may also scratch the pipeline, the inner wall of the first material chamber 3 and other structures. In addition, if the impurities are not cleaned up in time, the impurities may also accumulate in the pipeline, the first material chamber 3 and other structures, further affecting the actual flow rate of the first material.

[0075] Therefore, a first coarse filter 15 is provided to preliminarily filter the first material entering the first pipeline to prevent impurities with larger particles from flowing into the first pipeline.

[0076] The first coarse filter 15 may be made of filter paper or other media with a filtering space, or may be made of a separator (such as a magnetic separator, a centrifuge) or other equipment, as long as it can separate the first material from the impurities.

[0077] Furthermore, the first coarse filter 15 is disposed upstream of the first feed pump 12. That is, before the first material flows through the pump body, large particles of impurities therein are first screened out to prevent the large particles of impurities from damaging the first feed pump 12 and other mechanisms after the first feed pump 12.

[0078] Furthermore, the first feeding system 10 also includes a first fine filter 16, which is arranged in the first pipeline and downstream of the first coarse filter 15, and can further filter impurities in the first material.

[0079] By providing the first fine filter 16, impurities in the first material can be further filtered, so that impurities with smaller particles can be filtered out.

[0080] The first fine filter 16 can be arranged upstream of the first flow valve 13, so as to filter the first material twice before it enters the first flow valve 13, thereby ensuring that the first material flows downstream in a relatively pure state, and preventing impurities from affecting the control of the flow by the first flow valve 13.

[0081] In one embodiment, the first coarse filter 15 and the first fine filter 16 are made of filter paper or filter element. Different from the first coarse filter 15, the filter holes in the first fine filter 16 are smaller, and / or the medium layer of the first fine filter 16 is thicker, so as to further filter out small particle impurities in the first material. In this embodiment, after each period of use, the filter medium in the first coarse filter 15 and the first fine filter 16 needs to be replaced so that the first coarse filter 15 and the first fine filter 16 always have good filtering performance.

[0082] Furthermore, the first feeding system 10 also includes an overflow valve 17 , which is arranged in the first pipeline and upstream of the first discharge valve 14 ; when the pressure in the first pipeline is greater than a preset pressure, part of the first material is discharged through the overflow valve 17 .

[0083] It should be explained that when the first material delivery pump 12 extracts the first material from the first material box 11, the extracted first material will be pressurized once so that the first material can flow along the first pipeline. In order to prevent the first material delivery pump 12 from pressurizing the first material once and affecting other processing of the first material after entering the first material chamber 3, the pressurization condition after the once pressurization is often limited, that is, a pressure value is preset, so that each time the first material is extracted by the first material delivery pump 12, the pressure of the first material in the first pipeline is not greater than the preset pressure.

[0084] In actual use, due to equipment tolerance and other reasons, the pressure of the first material in the first pipeline may be greater than the preset pressure. In order to prevent the first material with excessive pressure from entering the downstream and affecting the final flow and treatment effect, the first pipeline needs to be depressurized.

[0085] For this purpose, an overflow valve 17 is provided. When the pressure in the first pipeline is greater than a preset pressure, the overflow valve 17 opens, and part of the first material flows out of the overflow valve, thereby ensuring that the pressure in the first pipeline is stable.

[0086] The relief valve 17 may be a pressure valve. When the pressure in the first pipeline is not greater than the preset pressure, the first material in the first pipeline cannot pass through the pressure valve, thereby stably flowing downstream. When the pressure in the first pipeline is greater than the preset pressure, the first material with high pressure acts on the valve core of the relief valve 17, causing the relief valve 17 to open, thereby achieving pressure relief of the first pipeline. As the first material flows out of the relief valve 17, the pressure in the first pipeline gradually decreases. When the pressure in the first pipeline decreases to the preset pressure, the relief valve 17 closes, and the first material continues to flow downstream.

[0087] The overflow valve 17 is arranged downstream of the first fine filter 16 and upstream of the first flow valve 13. After secondary filtration, the second material flows to the first flow valve 13, and the overflow valve 17 controls the pressure in the first pipeline so that the first flow valve 13 can accurately control the first material to pass at an appropriate flow rate.

[0088] Furthermore, the overflow valve 17 can be connected to the first material box 11, and in this case, the excess first material can flow back to the first material box 11 through the overflow valve 17 for next use. Alternatively, the overflow valve 17 can be connected to the rotating shaft 1, and in this case, the excess first material can flow into the rotating shaft 1 through the overflow valve 17 to lubricate the rotating shaft 1.

[0089] It should be noted that only certain materials can achieve lubrication of the rotating shaft 1, such as engine oil or lubricating oil. Of course, in some embodiments, the material may also perform other treatments on the rotating shaft 1, which is not limited in this application.

[0090] Similar to the first feeding system 10, the second feeding system 20 includes: a second material box 21, which is used to store the second material and is connected to the second material chamber 4 through a second pipeline; a second feed pump 22, which is arranged at the feed end of the second pipeline and can draw the second material in the second material box 21 into the second pipeline; a second flow valve 23, which is arranged in the second pipeline and can control the flow in the second pipeline; a second discharge valve 24, which is arranged at the discharge end of the second pipeline and can control the circulation of the second material.

[0091] When the second material is loaded, the second discharge valve 24 is opened, the second feed pump 22 works, extracts the second material in the second material box 21, and makes the second material flow to the second material chamber 4 along the second pipeline, and the second flow valve 23 controls the output of the second material, so that the required second material flows into the second material chamber 4. Subsequently, the second discharge valve 24 is closed, the rotating shaft 1 rotates, driving the cam 2 to rotate, so that the high point of the cam 2 contacts the second movable part 6, and the second movable part 6 extends into the second material chamber 4, thereby pressurizing the second material.

[0092] Furthermore, the second feeding system 20 also includes a second coarse filter 25, which is arranged in the second pipeline and can filter out impurities with larger particles in the second material.

[0093] Furthermore, the second feeding system 20 also includes a second fine filter 26, which is arranged in the second pipeline and downstream of the second coarse filter 25, and can further filter impurities with smaller particles in the second material.

[0094] Furthermore, the second feeding system 20 also includes an overflow hole, which is arranged in the second pipeline and upstream of the second discharge valve 24; when the pressure in the second pipeline is greater than the preset pressure, part of the second material is discharged through the overflow hole. The overflow hole can be connected to the rotating shaft 1, and the second material discharged through the overflow hole flows into the rotating shaft 1, and can lubricate the rotating shaft 1.

[0095] In addition, the feed pump further includes a first material receiving system 50, which is connected to the first material chamber 3; after the first movable member 5 enters the first material chamber 3, the pressure of the first material in the first material chamber 3 increases, and the pressurized first material enters the first material receiving system 50. And / or, the feed pump further includes a second material receiving system 60, which is connected to the second material chamber 4; after the second movable member 6 enters the second material chamber 4, the pressure of the second material in the second material chamber 4 increases, and the pressurized second material enters the second material receiving system 60.

[0096] The first material receiving system 50 and the second material receiving system 60 can be connected to different working equipment. At this time, after the first material is pressurized, the first material receiving system 50 receives the high-pressure first material and inputs it into the corresponding working equipment at the appropriate time; at the same time, the first material chamber 3 is empty, and a new round of pressurization of the first material can be started. After the second material is pressurized, the second material receiving system 60 receives the high-pressure second material and inputs it into the corresponding working equipment at the appropriate time; at the same time, the second material chamber 4 is empty, and a new round of pressurization of the second material can be started.

[0097] Alternatively, the first material receiving system 50 and the second material receiving system 60 are connected to the same working device. At this time, after the first material is pressurized, the first material receiving system 50 receives the high-pressure first material, and after the second material is pressurized, the second material receiving system 60 receives the high-pressure second material.

[0098] When the working equipment needs, the first material receiving system 50 and the second material receiving system 60 can work simultaneously or separately. By adjusting the position and number of the high points on the cam 2, different working rhythms can be simply met.

[0099] Specifically, the first material receiving system 50 includes: a first material receiving valve 51, connected to the first material chamber 3; a first oil rail 52, connected to the first material receiving valve 51, and capable of receiving the pressurized first material. And / or, the second material receiving system 60 includes: a second material receiving valve 61, connected to the second material chamber 4; a second oil rail 62, connected to the second material receiving valve 61, and capable of receiving the pressurized second material.

[0100] The first material receiving system 50 is taken as an example for description.

[0101] The first material receiving system 50 further includes a third pipeline, which connects the first material chamber 3 and the first oil rail 52. The first material receiving valve 51 is arranged at the feeding end of the third pipeline. After the first material in the first material chamber 3 is pressurized, the first material receiving valve 51 is opened, and the high-pressure material enters the third pipeline and is stored in the first oil rail 52.

[0102] When the first material needs to be supplied to the working equipment, the first oil rail 52 can spray out the high-pressure material. A pressure accumulator is also provided in the first oil rail 52 to ensure that the pressure of the injection is close to the pressure in the oil rail during the process from the start to the end of the injection. This ensures that the first oil rail 52 continuously sprays the high-pressure material in a stable state.

[0103] Furthermore, the first material receiving system 50 and / or the second material receiving system 60 further includes a rail pressure sensor for detecting the pressure in the first oil rail 52 or the second oil rail 62 .

[0104] The first material receiving system 50 is also taken as an example for description.

[0105] By providing a rail pressure sensor, the pressure of the first material in the first oil rail 52 can be constantly monitored, thereby achieving control over the injection accuracy and injection timing, and further ensuring that the first oil rail 52 continuously injects high-pressure materials in a stable state.

[0106] The structure of the second material collecting system 60 is similar to that of the first material collecting system 50 , and the details are not repeated here.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A feed pump, characterized in that: include: A rotating shaft (1) capable of rotating about its own axis; At least two cams (2) are arranged on the rotating shaft (1) at intervals along the axial direction of the rotating shaft (1); A first material supply system (10) connected to the first material chamber (3) and capable of supplying a first material to the first material chamber (3); A second material supply system (20) connected to the second material chamber (4) and capable of supplying a second material to the second material chamber (4); A first movable member (5), wherein the first material chamber (3) is provided with a first through hole, one end of the first movable member (5) is inserted into the first through hole, and the other end of the first movable member (5) contacts one of the cams (2); A second movable member (6), wherein the second material chamber (4) is provided with a second through hole, one end of the second movable member (6) is inserted into the second through hole, and the other end of the second movable member (6) contacts the other cam (2); Wherein, any one of the cams (2) has at least one high point, and any one of the cams (2) has a first state and a second state; The rotating shaft (1) rotates to drive the cam (2) to be in the first state, and the high point is away from the first movable part (5) or the second movable part (6); When the rotating shaft (1) rotates and drives the cam (2) to be in the second state, the high point contacts the first movable member (5) or the second movable member (6), so that at least a portion of the first movable member (5) extends into the first material cavity (3), or at least a portion of the second movable member (6) extends into the second material cavity (4).

2. The feed pump according to claim 1, characterized in that: The feed pump also includes: A first transmission mechanism (30) comprising a first transmission member (31) and a first elastic member (32), wherein the first transmission member (31) is in contact with one of the cams (2), and the first elastic member (32) is connected to the first movable member (5); When the cam (2) is in the second state, the high point contacts the first transmission member (31), so that the first transmission member (31) drives the first movable member (5) to move along the first through hole toward the inside of the first material cavity (3), and the first elastic member (32) is compressed; When the cam (2) is in the first state, the high point is away from the first transmission member (31), and the first elastic member (32) is restored, so that the first transmission member (31) abuts against the cam (2); and / or, a second transmission mechanism (40), comprising a second transmission member (41) and a second elastic member (42), wherein the second transmission member (41) is in contact with another of the cams (2), and the second elastic member (42) is connected to the second movable member (6); When the cam (2) is in the second state, the high point contacts the second transmission member (41), so that the second transmission member (41) drives the second movable member (6) to move along the second through hole toward the inside of the second material cavity (4), and the second elastic member (42) is compressed; When the cam (2) is in the first state, the high point is away from the second transmission member (41), and the second elastic member (42) recovers, so that the second transmission member (41) abuts against the cam (2).

3. The feed pump according to claim 1, characterized in that: At least one high point of one cam (2) is different from the high point position of the other cam (2). When the rotating shaft (1) rotates by a certain angle, the high point of one cam (2) contacts the first movable member (5), and the high point of the other cam (2) is away from the second movable member (6); Alternatively, at least one high point of one cam (2) is the same as the high point position of the other cam (2). When the rotating shaft (1) rotates by a certain angle, the high point of one cam (2) contacts the first movable member (5), and the high point of the other cam (2) contacts the second movable member (6).

4. The feed pump according to claim 1, characterized in that: The first feeding system (10) includes: A first material box (11) for storing the first material and communicating with the first material cavity (3) through a first pipeline; A first feeding pump (12) provided at the feeding end of the first pipeline and capable of pumping the first material in the first material box (11) into the first pipeline; A first flow valve (13) provided in the first pipeline and capable of controlling the flow rate in the first pipeline; A first discharge valve (14) provided at the discharge end of the first pipeline and capable of controlling the flow of the first material.

5. The feed pump according to claim 4, characterized in that: The first feeding system (10) further includes a first coarse filter (15) provided in the first pipeline and capable of filtering impurities in the first material.

6. The feed pump according to claim 5, characterized in that: The first feeding system (10) further includes a first fine filter (16) provided in the first pipeline and downstream of the first coarse filter (15) and capable of further filtering impurities in the first material.

7. The feed pump according to any one of claims 4 to 6, characterized in that: The first feeding system (10) further includes an overflow valve (17) provided in the first pipeline and upstream of the first discharge valve (14); When the pressure in the first pipeline is greater than the preset pressure, part of the first material is discharged through the overflow valve (17).

8. The feed pump according to claim 7, characterized in that: The overflow valve (17) communicates with the first material box (11); or the overflow valve (17) communicates with the rotating shaft (1).

9. The feed pump according to claim 1, characterized in that: The feeding pump further includes: A first material receiving system (50) communicating with the first material cavity (3); After the first movable member (5) enters the first material cavity (3), the pressure of the first material in the first material cavity (3) increases, and the pressurized first material enters the first material receiving system (50); And / or a second material receiving system (60) communicating with the second material cavity (4); After the second movable member (6) enters the second material cavity (4), the pressure of the second material in the second material cavity (4) increases, and the pressurized second material enters the second material receiving system (60).

10. The feed pump according to claim 9, characterized in that: The first material receiving system (50) includes: A first material receiving valve (51) communicating with the first material cavity (3); A first oil rail (52) communicating with the first material receiving valve (51) and capable of receiving the pressurized first material; And / or, the second material receiving system (60) comprises: A second material receiving valve (61), connected to the second material chamber (4); The second oil rail (62) is connected to the second material receiving valve (61) and is capable of receiving the pressurized second material.

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