Lubricating unit for preventing return and back suction of plunger through transition pair oil cavity
By designing a lubrication unit for transitional oil chamber in the automatic lubrication system, the problem of grease being unable to be inhaled during the return stroke of the plunger pump is solved, effective grease supply and sufficient lubrication of bearings are achieved, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202421721680.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the existing automatic lubrication system, the plunger pump cannot effectively inhale the grease during the return stroke after the grease discharge stroke, resulting in negative pressure in the main oil chamber, reducing grease supply, and causing early wear of the bearing.
A lubrication unit is designed to prevent the plunger from returning and suction by setting a transitional secondary oil chamber in the pump body. The lubrication unit includes a pump body, a grease replenishing one-way valve seat, a grease pressing device and a drive device. By controlling the stroke position of the grease pressing device, the grease is effectively squeezed to each lubrication point, and through the cooperation of the grease replenishing steel ball and the one-way valve seat, the main oil chamber is always maintained with sufficient grease.
It effectively prevents negative pressure from the secondary oil chamber, avoids grease suction, ensures sufficient lubrication of the bearing, extends the service life of the bearing, and improves the operating stability and reliability of the equipment.
Smart Images
Figure CN222760693U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment bearing lubrication, and in particular to a lubrication unit which uses a transition auxiliary oil chamber to prevent the return stroke of a plunger from being sucked back. Background Art
[0002] Automatic lubrication systems are widely used in heavy machinery and equipment such as wind turbines, high-speed trains, and heavy trucks to achieve lubrication effects on their internal bearings and increase their service life.
[0003] In the related art, the existing automatic lubrication system is mainly composed of an integrated grease supply unit and a distributor; the original intention of the design of this lubrication system is to replenish the grease into the bearing in a timely and quantitative manner according to the loss of grease in the bearing. Its defect is that the lubrication pump of the integrated grease supply unit is a non-follow-up self-priming neutral-gear squeeze-in plunger pump. During the return stroke after the grease discharge stroke, before the plunger leaves the cylinder body, it cannot absorb the grease as the plunger moves back. The continuous expansion of the main oil chamber will inevitably cause negative pressure in the main oil chamber, causing the grease that has been discharged into the grease discharge groove to be sucked back, reducing the amount of grease that has been discharged by the plunger during the grease discharge stroke, resulting in insufficient grease supply to the bearing, causing early wear of the bearing, and the sucked back grease also occupies part of the space in the main oil chamber, reducing the amount of grease squeezed into the lubrication pump. Utility Model Content
[0004] The utility model aims to provide a lubrication unit which uses a transition auxiliary oil chamber to prevent the return stroke of the plunger from sucking back, so as to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A lubrication unit using a transitional auxiliary oil chamber to prevent the plunger from sucking back during return stroke, comprising:
[0007] A pump body, one end of which is provided with a screw plug;
[0008] A grease replenishing one-way valve seat is arranged on the top of the pump body, and a grease replenishing steel ball is arranged in the grease replenishing one-way valve seat;
[0009] A grease pressing device is provided in the pump body, a main oil chamber is formed between the right side of the grease pressing device and the screw plug, a secondary oil chamber is formed on the left side of the grease pressing device when the grease pressing device is moved to the right, and the grease replenishing one-way valve seat is connected to the main oil chamber;
[0010] The grease pressing device is provided with a grease discharge groove, the pump body is provided with a plurality of grease discharge holes, and the bottoms of the plurality of grease discharge holes are correspondingly provided with a plurality of grease discharge ports;
[0011] It also includes a driving device, which is connected to the fat pressing device.
[0012] The lubrication unit according to this solution, which uses a transition auxiliary oil chamber to prevent the plunger from returning and sucking back, has at least the following technical effects:
[0013] The lubrication unit uses a transitional auxiliary oil chamber to prevent the return of the plunger from being sucked back. In the initial state, the main oil chamber and the grease pressing device are filled with grease. When the driving device pushes the grease pressing device to move to the right, the space of the main oil chamber is compressed, and the grease of the same volume to be compressed is squeezed into the auxiliary oil chamber on the left side of the grease pressing device, and part of the grease is discharged to various lubrication points on the bearing through a number of grease discharge ports, while the other part of the grease is squeezed into the auxiliary oil chamber; when the grease pressing device moves to the left, the auxiliary oil chamber is squeezed, and the grease squeezed into the auxiliary oil chamber when the grease pressing device moves to the right is squeezed back into the main oil chamber, but because part of the grease is discharged to the lubrication points, the remaining grease is not enough to fill the main oil chamber, and the continuous leftward movement of the grease pressing device will cause the space of the main oil chamber to continue to expand, which will inevitably cause negative pressure in the main oil chamber, and the grease filling steel ball moves downward under the action of atmospheric pressure, and new grease flows into the main oil chamber from the gap between the grease filling steel ball and the inner wall of the grease filling one-way valve seat, and the lubricating oil in the main oil chamber is refilled to prepare for the next grease discharge cycle.
[0014] The lubrication unit makes the grease return liquid resistance in the flow channel greater than its grease suction liquid resistance, so that the grease in the auxiliary oil chamber is smoothly squeezed into the main oil chamber, preventing the auxiliary oil chamber from generating negative pressure and back-sucking the grease in the grease discharge groove, thereby avoiding insufficient grease supply to each bearing lubrication point and causing early wear of the bearing.
[0015] The lubrication unit which uses a transition auxiliary oil chamber to prevent the plunger from returning and sucking back controls the stroke position of the grease pressing device to ensure that the grease pressing device discharges the grease to various lubrication points in a single stroke, thereby meeting the grease supply demand of each lubrication point, ensuring sufficient lubrication of the bearing, thereby ensuring the service life of the bearing and improving the operating stability and reliability of the equipment.
[0016] As a further solution of the utility model: the grease pressing device is a stepped plunger.
[0017] As a further solution of the utility model: the stepped plunger includes a large cylinder and a small cylinder, an upper oil channel and a lower oil channel are provided inside and along the length of the large cylinder, and one end of the upper oil channel is connected to the main oil chamber.
[0018] Since the grease pressing device is a stepped plunger, the stepped plunger includes a large cylinder and a small cylinder, an upper oil channel and a lower oil channel are arranged inside and along the length of the large cylinder, one end of the upper oil channel is connected to the main oil chamber, compared with the existing non-follow-up self-priming neutral squeeze-in plunger pump, after the grease discharge stroke of the stepped plunger of the utility model is completed when the stepped plunger moves to the left, the grease in the auxiliary oil chamber can flow back to the main oil chamber through the upper oil channel, so as to avoid the main oil chamber from continuously expanding when the stepped plunger moves to the left, causing negative pressure in the main oil chamber, thereby sucking back a part of the grease discharged into the grease discharge groove, effectively preventing the back-suction of the grease and improving the stability of the grease supply.
[0019] As a further solution of the utility model: the upper oil passage and the lower oil passage are both communicated with the auxiliary oil chamber.
[0020] As a further solution of the utility model: a plug is provided at one end of the lower oil channel.
[0021] As a further solution of the utility model: the lower oil channel is communicated with the grease discharge groove.
[0022] Since the upper oil channel and the lower oil channel are both connected to the auxiliary oil chamber, a plug is provided at one end of the lower oil channel, and the lower oil channel is connected to the grease discharge groove. In the initial state, the main oil chamber and the upper oil channel and the lower oil channel of the stepped plunger large cylinder are filled with grease. When the driving device drives the stepped plunger to move right and squeezes the space of the main oil chamber, the grease of the same volume as the rightward movement of the stepped plunger is squeezed into the auxiliary oil chamber. At the same time, the grease of the same volume as the space occupied by the small cylinder is discharged into the grease discharge groove, and a part of the grease is discharged to the first lubrication point on the bearing through the grease discharge port, and the grease of the area difference between the large cylinder and the small cylinder multiplied by the stroke part is squeezed into the auxiliary oil chamber. The stepped plunger continues to move to the right, and the grease discharge groove gradually completes the grease supply to several grease discharge holes, realizing the quantitative grease supply to the second lubrication point in a progressive series-parallel manner.
[0023] When the stepped plunger ends its right stroke and drives the stepped plunger to move left, the auxiliary oil chamber is squeezed, and the grease squeezed into the auxiliary oil chamber when the stepped plunger moves right is squeezed back into the main oil chamber. However, since part of the grease is discharged to the lubrication point, the remaining grease is insufficient to fill the main oil chamber. The continuous leftward movement of the stepped plunger will cause the space of the main oil chamber to continue to expand, which will inevitably cause negative pressure in the main oil chamber. The grease replenishing steel ball moves downward under the action of atmospheric pressure, and new grease flows into the main oil chamber from the gap between the grease replenishing steel ball and the inner wall of the grease replenishing one-way valve seat, refilling the main oil chamber with lubricating oil, preventing the grease in the grease discharge groove from being sucked back, and preparing for the next grease discharge cycle.
[0024] Since the upper oil channel, auxiliary oil chamber and lower oil channel increase the grease stroke, it can be known from the principles of fluid mechanics that increasing the pipeline stroke will increase the grease flow loss caused by the reflux liquid resistance, making the grease reflux liquid resistance in the upper and lower oil channels greater than its grease suction liquid resistance, thereby eliminating the negative pressure back suction effect generated by the grease discharge groove when the stepped plunger moves to the left; the grease in the auxiliary oil chamber can be smoothly squeezed into the main oil chamber, preventing the auxiliary oil chamber from generating negative pressure and back-sucking the grease in the grease discharge groove, while avoiding the back-sucked grease from occupying part of the space in the main oil chamber, achieving and maintaining a balance between the pipeline liquid resistance encountered when the grease flows and the negative pressure, avoiding insufficient grease supply to each bearing lubrication point and causing early wear of the bearing.
[0025] As a further solution of the utility model: a compression spring is arranged at the bottom of the grease replenishing steel ball, and a spring seat is arranged at the bottom of the compression spring.
[0026] Since a compression spring is provided at the bottom of the grease filling steel ball and a spring seat is provided at the bottom of the compression spring, the grease filling steel ball is lifted up by the rebound of the compression spring after grease filling is completed, so that the grease filling valve is closed to avoid excessive lubrication, maintain a stable pressure in the main oil chamber, and ensure the smoothness and stability of grease discharge.
[0027] As a further solution of the utility model: the diameter of the grease discharge hole is greater than the width of the grease discharge groove.
[0028] Since the diameter of the grease discharge hole is greater than the width of the grease discharge groove, when the grease discharge groove is connected to the grease discharge hole, the grease is quickly discharged into the grease discharge hole to avoid grease clogging the grease discharge hole, providing a stable grease supply to the bearing lubrication point, helping the grease to better cover the lubrication surface and improve lubrication efficiency.
[0029] As a further solution of the utility model: the distance between two adjacent grease discharge holes is smaller than the width of the grease discharge groove.
[0030] Since the distance between two adjacent grease discharge holes is smaller than the width of the grease discharge groove, the amount of grease supplied to each point is the product of the cross-sectional area of the small cylinder, the diameter of a number of grease discharge holes and the spacing between a number of grease discharge holes; the spacing between every two grease discharge holes should be smaller than the width of the grease discharge groove, thus forming a new progressive series-parallel automatic lubrication system; the grease in the grease discharge groove can be more densely discharged into the grease discharge holes, ensuring uniform distribution of the grease, better coverage of the bearing lubrication points, ensuring the continuity of lubrication, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.
[0032] Figure 1It is a schematic diagram of the structure of a lubrication unit in a static state, which uses a transition auxiliary oil chamber to prevent the plunger from sucking back during its return stroke;
[0033] Figure 2 The diagram is a structural diagram of the right-shifted state of a grease pressing device of a lubrication unit that uses a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke.
[0034] Reference numerals:
[0035] 1. Pump body; 2. Screw plug; 3. Grease-replenishing one-way valve seat; 4. Grease-replenishing steel ball; 5. Main oil chamber; 6. Auxiliary oil chamber; 7. Grease discharge groove; 8. Grease discharge hole; 9. Grease discharge port; 10. Stepped plunger; 101. Large cylinder; 102. Small cylinder; 1011. Upper oil channel; 1012. Lower oil channel; 1013. Plug; 11. Compression spring; 12. Spring seat. DETAILED DESCRIPTION
[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0042] like Figure 1 and Figure 2 The embodiment of the utility model shown is a lubrication unit that uses a transitional auxiliary oil chamber to prevent the return stroke of the plunger from being sucked back, comprising: a pump body 1, a screw plug 2 is arranged at one end of the pump body 1; a grease replenishing one-way valve seat 3 is arranged on the top of the pump body 1, and a grease replenishing steel ball 4 is arranged in the grease replenishing one-way valve seat 3; a grease pressing device is arranged in the pump body 1, a main oil chamber 5 is formed between the right side of the grease pressing device and the screw plug 2, and an auxiliary oil chamber 6 is formed on the left side of the grease pressing device when the grease pressing device is moved to the right, and the grease replenishing one-way valve seat 3 is connected with the main oil chamber 5; a grease discharge groove 7 is arranged in the grease pressing device, and a plurality of grease discharge holes 8 are arranged on the pump body 1, and a plurality of grease discharge ports 9 are correspondingly arranged at the bottom of the plurality of grease discharge holes 8; and a driving device is also included, and the driving device is connected to the grease pressing device.
[0043] When in use, the lubrication unit with a transitional auxiliary oil chamber to prevent the return of the plunger from being sucked back, in the initial state, the main oil chamber 5 and the grease pressing device are filled with grease. When the driving device pushes the grease pressing device to move to the right, the space in the main oil chamber 5 is compressed, and the grease of the same volume to be compressed is squeezed into the auxiliary oil chamber 6 on the left side of the grease pressing device, and part of the grease is discharged to various lubrication points on the bearing through a number of grease discharge ports 9, while another part of the grease is squeezed into the auxiliary oil chamber 6; when the grease pressing device moves to the left, the auxiliary oil chamber 6 is squeezed, The grease squeezed into the auxiliary oil chamber 6 when the grease pressing device moves to the right is squeezed back into the main oil chamber 5. However, since a part of the grease is discharged to the lubrication point, the remaining grease is insufficient to fill the main oil chamber. The continuous leftward movement of the grease pressing device will cause the space of the main oil chamber 5 to continue to expand, which will inevitably cause negative pressure in the main oil chamber 5. The grease replenishing steel ball 4 moves downward under the action of atmospheric pressure, and new grease flows into the main oil chamber 5 from the gap between the grease replenishing steel ball 4 and the inner wall of the grease replenishing one-way valve seat 3, refilling the main oil chamber 5 with lubricating oil and preparing for the next grease discharge cycle.
[0044] Specifically, the lubrication unit makes the grease reflux liquid resistance in the flow channel greater than its grease suction liquid resistance, so that the grease in the auxiliary oil chamber 6 is smoothly squeezed into the main oil chamber 5, preventing the auxiliary oil chamber 6 from generating negative pressure and back-sucking the grease in the grease discharge groove 7, thereby avoiding insufficient grease supply to each bearing lubrication point and causing premature wear of the bearing.
[0045] The lubrication unit which uses a transition auxiliary oil chamber to prevent the plunger from returning and sucking back controls the stroke position of the grease pressing device to ensure that the grease pressing device discharges the grease to various lubrication points in a single stroke, thereby meeting the grease supply demand of each lubrication point, ensuring sufficient lubrication of the bearing, thereby ensuring the service life of the bearing and improving the operating stability and reliability of the equipment.
[0046] Furthermore, if Figure 1 and Figure 2 As shown, the grease pressing device is a stepped plunger 10; the stepped plunger 10 includes a large cylinder 101 and a small cylinder 102, an upper oil passage 1011 and a lower oil passage 1012 are arranged inside and along the length of the large cylinder 101, and one end of the upper oil passage 1011 is connected to the main oil chamber 5.
[0047] Specifically, since the grease pressing device is a stepped plunger 10, the stepped plunger 10 includes a large cylinder 101 and a small cylinder 102, and an upper oil channel 1011 and a lower oil channel 1012 are arranged inside and along the length of the large cylinder 101, and one end of the upper oil channel 1011 is connected to the main oil chamber 5; compared with the existing non-follow-up self-priming neutral squeeze-in type plunger pump, after the stepped plunger 10 of the utility model completes the grease discharge stroke moving to the right, when the stepped plunger 10 moves to the left, the grease in the auxiliary oil chamber 6 can flow back to the main oil chamber 5 through the upper oil channel 1011, avoiding that when the stepped plunger 10 moves to the left, the main oil chamber 5 continues to expand, causing negative pressure to be generated in the main oil chamber 5, thereby sucking back a part of the grease discharged into the grease discharge groove 7, effectively preventing the back suction of the grease, and improving the stability of the grease supply.
[0048] Furthermore, the upper oil passage 1011 and the lower oil passage 1012 are both connected to the auxiliary oil chamber 6 ; a plug 1013 is provided at one end of the lower oil passage 1012 ; and the lower oil passage 1012 is connected to the grease discharge groove 7 .
[0049] When in use, in the initial state, the main oil chamber 5 and the upper oil passage 1011 and the lower oil passage 1012 of the stepped plunger large cylinder 101 are filled with grease. When the driving device drives the stepped plunger 10 to move rightward and occupy the space of the main oil chamber 5, the grease of the same volume as the rightward movement of the stepped plunger 10 is squeezed into the auxiliary oil chamber 6. At the same time, the grease of the same volume as the space occupied by the small cylinder 102 is discharged into the grease discharge groove 7, a part of which is discharged to the first lubrication point on the bearing through the grease discharge port 9, and the grease of the area difference between the large cylinder 101 and the small cylinder 102 multiplied by the stroke part is squeezed into the auxiliary oil chamber 6, the stepped plunger 10 continues to move rightward, and the grease discharge groove 7 gradually completes the grease supply to the plurality of grease discharge holes 8, realizing the quantitative grease supply to the second lubrication point in a progressive series-parallel manner;
[0050] When the stepped plunger 10 ends its rightward stroke and is driven to move leftward, the auxiliary oil chamber 6 is squeezed, and the grease squeezed into the auxiliary oil chamber 6 when the stepped plunger 10 moves rightward is squeezed back into the main oil chamber 5. However, since a portion of the grease is discharged to the lubrication point, the remaining grease is insufficient to fill the main oil chamber 5. The continuous leftward movement of the stepped plunger 10 will cause the space of the main oil chamber 5 to continue to expand, which will inevitably cause negative pressure in the main oil chamber 5. The grease replenishing steel ball 4 moves downward under the action of atmospheric pressure, and new grease flows into the main oil chamber 5 from the gap between the grease replenishing steel ball 4 and the inner wall of the grease replenishing one-way valve seat 3, refilling the main oil chamber 5 with lubricating oil, preventing the grease in the grease discharge groove 7 from being sucked back, and preparing for the next grease discharge cycle.
[0051] Specifically, since the upper oil channel 1011, the auxiliary oil chamber 6 and the lower oil channel 1012 increase the grease stroke, it can be known from the principles of fluid mechanics that increasing the pipeline stroke will increase the grease flow loss caused by the reflux liquid resistance, making the grease reflux liquid resistance in the upper and lower oil channels greater than its grease suction liquid resistance, thereby eliminating the negative pressure back-suction effect generated by the grease discharge groove 7 when the stepped plunger 10 moves to the left; the grease in the auxiliary oil chamber 6 can be smoothly squeezed into the main oil chamber 5, preventing the auxiliary oil chamber 6 from generating negative pressure and back-sucking the grease in the grease discharge groove 7, while avoiding the back-sucked grease from occupying part of the space of the main oil chamber 5, achieving and maintaining a balance between the pipeline liquid resistance encountered when the grease flows and the negative pressure, avoiding insufficient grease supply to each bearing lubrication point, causing early wear of the bearing.
[0052] like Figure 1 As shown, a compression spring 11 is arranged at the bottom of the grease-replenishing steel ball 4 , and a spring seat 12 is arranged at the bottom of the compression spring 11 .
[0053] Specifically, since a compression spring 11 is provided at the bottom of the grease replenishing steel ball 4 and a spring seat 12 is provided at the bottom of the compression spring 11, the grease replenishing steel ball 4 is lifted up by the rebound of the compression spring 11 after grease replenishment is completed, so that the grease replenishing valve is closed to avoid excessive lubrication, maintain a stable pressure in the main oil chamber 5, and ensure the smoothness and stability of grease discharge.
[0054] According to the embodiment of the utility model, the diameter of the grease discharge hole 8 is greater than the width of the grease discharge groove 7 .
[0055] Specifically, since the diameter of the grease discharge hole 8 is larger than the width of the grease discharge groove 7, when the grease discharge groove 7 is connected to the grease discharge hole 8, the grease is quickly discharged into the grease discharge hole 8 to prevent the grease from clogging the grease discharge hole 8, thereby providing a stable grease supply to the bearing lubrication point, helping the grease to better cover the lubrication surface and improve lubrication efficiency.
[0056] Furthermore, the distance between two adjacent grease discharge holes 8 is smaller than the width of the grease discharge groove 7 .
[0057] Specifically, since the spacing between two adjacent grease discharge holes 8 is smaller than the width of the grease discharge groove 7, the amount of grease supplied to each point is the cross-sectional area of the small cylinder 102 multiplied by the diameter of a number of grease discharge holes 8 plus the product of the spacing dimensions between a number of grease discharge holes 8; the spacing dimension between every two grease discharge holes 8 should be smaller than the width of the grease discharge groove 7, thereby forming a new progressive series-parallel automatic lubrication system; the grease in the grease discharge groove 7 can be more densely discharged into the grease discharge holes 8, ensuring uniform distribution of the grease, better coverage of the bearing lubrication points, ensuring the continuity of lubrication, and improving work efficiency.
[0058] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.
Claims
1. A lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during return stroke, characterized in that: include: A pump body (1), wherein a screw plug (2) is provided at one end of the pump body (1); A grease replenishing one-way valve seat (3) is arranged on the top of the pump body (1), and a grease replenishing steel ball (4) is arranged inside the grease replenishing one-way valve seat (3); A grease pressing device is provided in the pump body (1), a main oil chamber (5) is formed between the right side of the grease pressing device and the screw plug (2), a secondary oil chamber (6) is formed on the left side of the grease pressing device when the grease pressing device is in the rightward state, and the grease replenishing one-way valve seat (3) is connected to the main oil chamber (5); The grease pressing device is provided with a grease discharge groove (7), the pump body (1) is provided with a plurality of grease discharge holes (8), and a plurality of grease discharge ports (9) are correspondingly provided at the bottom of the plurality of grease discharge holes (8); It also includes a driving device, which is connected to the fat pressing device.
2. The lubrication unit for preventing the plunger from sucking back during its return stroke by using a transitional auxiliary oil chamber according to claim 1, characterized in that: The grease pressing device is a stepped plunger (10).
3. The lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke according to claim 2, characterized in that: The stepped plunger (10) comprises a large cylinder (101) and a small cylinder (102), an upper oil passage (1011) and a lower oil passage (1012) are arranged inside the large cylinder (101) and along the length of the large cylinder (101), and one end of the upper oil passage (1011) is connected to the main oil chamber (5).
4. The lubrication unit for preventing the return stroke of the plunger by using the transition auxiliary oil chamber according to claim 3 is characterized in that: The upper oil passage (1011) and the lower oil passage (1012) are both in communication with the auxiliary oil chamber (6).
5. The lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke according to claim 4, characterized in that: A plug (1013) is provided at one end of the lower oil channel (1012).
6. The lubrication unit for preventing the return stroke of the plunger by using the transition auxiliary oil chamber according to claim 5 is characterized in that: The lower oil passage (1012) is in communication with the grease discharge groove (7).
7. The lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke according to claim 1, characterized in that: A compression spring (11) is arranged at the bottom of the grease replenishing steel ball (4), and a spring seat (12) is arranged at the bottom of the compression spring (11).
8. The lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke according to claim 3, characterized in that: The diameter of the grease discharge hole (8) is greater than the width of the grease discharge groove (7).
9. The lubrication unit with a transitional auxiliary oil chamber to prevent the plunger from sucking back during its return stroke according to claim 8, characterized in that: The distance between two adjacent grease discharge holes (8) is smaller than the width of the grease discharge groove (7).