Heavy pump lubrication system

Abstract

The utility model relates to a heavy-duty pump lubricating system, which comprises a heavy-duty pump and a single-line columnar or blocky distributor, the heavy-duty pump comprises an eccentric rotating shaft and a sliding block, the sliding block is sleeved on the eccentric rotating shaft so as to slide along with the rotation of the eccentric rotating shaft, and a T-shaped hanging groove is arranged at the end part of the sliding block and is used for being matched with a hanging head of a plunger pair in a hanging way; a lubricant outlet of the heavy pump communicates with a lubricant inlet of the single-line columnar distributor, and a lubricant outlet of the single-line columnar distributor is used for leading to a to-be-lubricated part, so that the technical problems that an existing single-line lubricating system is high in failure rate due to quick abrasion of a plunger pair and cannot adapt to high-pressure and large-displacement application scenes are solved at the same time.

Description

Technical Field

[0001] This utility model relates to a heavy-duty pump lubrication system. Background Technology

[0002] Currently, single-line lubrication systems on the market generally fall into two categories: the first category consists of a standard lubrication pump, a large-displacement, high-pressure columnar or block-shaped distributor, and other components; the second category consists of a heavy-duty pump, a standard single-line progressive distributor, and other components. The first type of single-line lubrication system suffers from frequent system failures due to the rapid wear and easy damage of its plunger assembly. The second type of single-line lubrication system is unsuitable for high-displacement and high-pressure applications due to the relatively small displacement and oil pressure it can withstand from its distributor.

[0003] Given the technical problems existing in the aforementioned single-line lubrication system, there are currently no relevant solutions, and therefore there is an urgent need to find effective solutions to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a heavy-duty pump lubrication system that solves the problem that existing single-line lubrication systems suffer from frequent system failures due to rapid wear of the plunger pair and cannot be applied to scenarios requiring high pressure and large displacement.

[0005] The technical solution of the first heavy-duty pump lubrication system of this utility model is as follows: The heavy-duty pump lubrication system includes: a heavy-duty pump, including an eccentric rotating shaft and a slider, the slider being sleeved on the eccentric rotating shaft to perform linear reciprocating motion with the rotation of the eccentric rotating shaft, the end of the slider being provided with a T-shaped hanging groove for engaging with the hanging head of the plunger pair; a single-line columnar distributor, including a control piston, a metering piston, a first return spring and a second return spring, the first return spring being used to push the control piston back to the starting position; the second return spring being used to push the metering piston back to its starting position; the lubricant outlet of the heavy-duty pump is connected to the lubricant inlet of the single-line columnar distributor, and the lubricant outlet of the single-line columnar distributor is used to lead to the part to be lubricated.

[0006] The heavy-duty pump also includes a pump head, which is disc-shaped with a rectangular groove in the middle, and the slider is assembled in the rectangular groove.

[0007] The slider has a waist-shaped hole in the middle, and the output end of the eccentric rotating shaft is inserted into the waist-shaped hole, which extends in a direction perpendicular to the sliding direction of the slider.

[0008] The heavy-duty pump also includes a pump housing, which is cylindrical and fitted over the pump head. The side walls at both ends of the rectangular groove are respectively provided with first plunger mounting holes, and the two first plunger mounting holes are coaxially arranged and penetrate the pump head. The pump housing is provided with second plunger mounting holes that are coaxially corresponding to the first plunger mounting holes.

[0009] There are two plunger pairs, which are installed in the pump head through the first and second plunger mounting holes respectively.

[0010] Wear-resistant guide plates are fixedly installed on the two side walls along the length of the rectangular groove, and the slider slides in cooperation with the two wear-resistant guide plates respectively.

[0011] The beneficial effects of this utility model are as follows: The heavy-duty pump lubrication system of this utility model includes a heavy-duty pump and a columnar single-line distributor. Since a slider is set inside the pump head of the heavy-duty pump, and the slider is sleeved on the eccentric rotating shaft, the eccentric rotating shaft directly acts on the slider. The slider only applies axial force to the plunger pair, which significantly reduces the friction between the plunger core and the inner wall of the plunger sleeve, thereby greatly slowing down the wear rate of the plunger pair. In addition, the double-spring structure of the single-line columnar distributor makes the lubrication system of this solution not only accurate in metering, but also has the advantages of high pressure resistance and large displacement. Therefore, the heavy-duty pump lubrication system of this solution not only has a low failure rate, but can also be applied to high-pressure and large-displacement scenarios.

[0012] The technical solution of the second heavy-duty pump lubrication system of this utility model is as follows: The heavy-duty pump lubrication system includes:

[0013] A heavy-duty pump includes an eccentric shaft and a slider. The slider is fitted onto the eccentric shaft and reciprocates linearly with the rotation of the eccentric shaft. The end of the slider is provided with a T-shaped groove for engaging with the head of a plunger assembly. A single-line block distributor includes a lubricant inlet, a control piston, a first metering chamber, a second metering chamber, a first lubricant channel, and a second lubricant channel. The control piston includes a first control space and a second control space, corresponding to a first switch state and a second switch state, respectively. In the first switch state, the lubricant inlet is connected to the first metering chamber through the first control space and the first lubricant channel. In the second switch state, the lubricant inlet is connected to the second metering chamber through the second control space and the second lubricant channel.

[0014] The heavy-duty pump also includes a pump head, which is disc-shaped with a rectangular groove in the middle, and the slider is assembled in the rectangular groove.

[0015] The slider has a waist-shaped hole in the middle, and the output end of the eccentric rotating shaft is inserted into the waist-shaped hole, which extends in a direction perpendicular to the sliding direction of the slider.

[0016] The heavy-duty pump also includes a pump housing, which is cylindrical and fitted over the pump head. The side walls at both ends of the rectangular groove are respectively provided with first plunger mounting holes, and the two first plunger mounting holes are coaxially arranged and penetrate the pump head. The pump housing is provided with second plunger mounting holes that are coaxially corresponding to the first plunger mounting holes.

[0017] There are two plunger pairs, which are installed in the pump head through the first and second plunger mounting holes respectively.

[0018] Wear-resistant guide plates are fixedly installed on the two side walls along the length of the rectangular groove, and the slider slides in cooperation with the two wear-resistant guide plates respectively.

[0019] The single-line block distributor is equipped with a Hall sensor to detect the movement of its control piston, thereby monitoring the working status of the single-line block distributor.

[0020] The outer peripheral surface of the slider is provided with a wear-resistant coating.

[0021] The beneficial effects of this utility model are as follows: The heavy-duty pump lubrication system of this utility model includes a heavy-duty pump and a columnar single-line distributor. Since a slider is set inside the pump head of the heavy-duty pump, and the slider is sleeved on the eccentric rotating shaft, the eccentric rotating shaft directly acts on the slider. The slider only applies axial force to the plunger pair, which significantly reduces the friction between the plunger core and the inner wall of the plunger sleeve, thereby greatly slowing down the wear rate of the plunger pair. In addition, the single-line block distributor has two control spaces and two lubricant channels. It has a simple structure and does not have too many complex vulnerable parts. It has the advantages of stable performance, accurate metering, high pressure resistance, and large displacement. Therefore, the heavy-duty pump lubrication system of this solution not only has the advantages of low failure rate and low maintenance cost, but can also be applied to high-pressure and large-displacement scenarios. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of one embodiment of the first heavy-duty pump lubrication system of this utility model;

[0023] Figure 2 This is a schematic diagram of an embodiment of the second heavy-duty pump lubrication system of this utility model;

[0024] Figure 3 This is a schematic diagram of the longitudinal section of a heavy-duty plunger pump.

[0025] Figure 4 A three-dimensional view of the joint between the pump head and the slider;

[0026] Figure 5 A three-dimensional structural diagram showing the fit between the plunger assembly, slider, and eccentric shaft;

[0027] Figure 6 for Figure 4 Internal structure diagram;

[0028] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0029] Figure 8 This is a 3D structural diagram of the pump head;

[0030] Figure 9 for Figure 1A magnified view of a section at point A in the middle;

[0031] In the diagram: 1-oil tank, 2-monitor, 3-pump housing, 31-second plunger mounting hole, 4-pump head, 41-rectangular groove, 42-first plunger mounting hole, 43-wear-resistant guide plate, 5-impeller, 6-plunger pair, 61-plunger core, 611-hanging head, 62-plunger sleeve, 621-external thread, 63-plug, 64-copper gasket, 65-sealing sleeve, 7-motor, 8-eccentric shaft, 81-input end, 82-output end, 9-slider, 91-waisted hole, 92-T-shaped hanging groove, 10-plunger heavy-duty pump, 11-single-line columnar distributor, 12-single-line block distributor, 13-lubrication point, 14-two-position two-way solenoid valve, 15-oil replenishing valve, 16-pressure transmitter. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0036] An embodiment of the first heavy-duty pump lubrication system of this utility model: as follows Figure 1 As shown, the heavy-duty pump columnar lubrication system includes a heavy-duty pump 10, a single-line columnar distributor 11, a two-position two-way solenoid valve 14, a replenishing valve 15, and a pressure transmitter 16. The heavy-duty pump is the core component of the single-line lubrication system and generally includes an oil tank 1 for storing grease, a motor 7 that provides power, a plunger assembly 6 that provides suction power, and a monitor 2 that controls the entire system.

[0037] Specifically, such as Figure 3 As shown, the heavy-duty pump 10 includes an oil tank 1, a monitor 2, a pump housing 3, a pump head 4, a motor 7, an impeller 5, a plunger assembly 6, an eccentric shaft 8, and a slider 9, etc. Figure 3 , 6 As shown, the eccentric rotating shaft 8 includes an input end 81 connected to the motor 7 and an output end 82 that cooperates with the slider 9. The input end 81 and the output end 82 are not coaxial. When the motor 7 drives the input end 81 to rotate around its own axis, it also drives the output end 82 to rotate around the axis of the input end 81. The output end 82 drives the slider 9 to reciprocate linearly along the wear-resistant guide plate 43. Figure 4 , 8 As shown, the pump head 4 is disc-shaped with a rectangular groove 41 in the middle for the slider 9 to slide within it; the side walls at both ends of the rectangular groove 41 are respectively provided with first plunger mounting holes 42, and the two first plunger mounting holes 42 are coaxially arranged and penetrate the pump head 4. Figure 4 , 6 As shown, slider 9 is assembled in rectangular groove 41. Slider 9 has a waist-shaped hole 91 in the middle. The output end 82 of eccentric rotating shaft 8 is inserted into the waist-shaped hole 91. The waist-shaped hole 91 extends in a direction perpendicular to the sliding direction of slider 9. T-shaped hanging grooves 92 are respectively provided at both ends of slider 9. Pump housing 3 is cylindrical and sleeved on the outside of pump head 4. Second plunger mounting holes 31 are provided coaxially and correspondingly to the first plunger mounting holes 42. Figure 5-7 As shown, there are two plunger pairs 6, which are respectively installed inside the pump head 4 through the first and second plunger mounting holes 31. Each pair includes a slidingly fitted plunger core 61 and a plunger sleeve 62. The outer end of the plunger core 61 has a T-shaped hanging head 611 for engaging with the T-shaped hanging groove 92. The plunger sleeve 62 has an external thread 621 for threaded connection with the pump head 4. The plunger sleeve 62 is provided with a sealing gasket and a sealing sleeve 65 to achieve a sealing fit between the plunger sleeve 62 and the holes of the first and second plunger mounting holes 31, respectively. The sealing gasket is a copper gasket 64.

[0038] Wear-resistant guide plates 43 are fixedly installed on both side walls of the rectangular groove 41 along its length, and the slider 9 slides in cooperation with the two wear-resistant guide plates 43 respectively. Since the eccentric rotating shaft 8 provides a component force perpendicular to the direction of movement of the slider 9, the wear rate between the slider 9 and the pump head 4 is relatively fast. By setting the wear-resistant guide plates 43, wear on the pump head 4 is avoided. The sealing sleeve 65 is made of rubber and includes a sleeve portion that extends into the second plunger mounting hole 31 and a flange portion that fits against the edge of the second plunger mounting hole 31. In other embodiments, it may also include a dust cover that is detachably connected to the flange portion. The dust cover is installed on the outer end of the corresponding plunger pair 6. The dust cover protects the outer end of the plunger pair 6 from wind, sand, rain and snow erosion. The pump head 4 is made of aluminum alloy, and the wear-resistant guide plates 43 are made of steel.

[0039] In use, the motor 7 drives the eccentric shaft 8 to rotate, causing the output end 82 to rotate around the axis of the input end 81. Since the output end 82 is inserted into the waist-shaped hole 91 of the slider 9, the rotation of the output end 82 will drive the slider 9 to move. Due to the guiding effect of the rectangular groove 41, the slider 9 moves back and forth along the length of the rectangular groove 41. During this process, the output end 82 slides along the waist-shaped hole 91. The reciprocating movement of the slider 9 drives the plunger core 61 to move through its T-shaped hanging groove 92, thereby achieving the pumping purpose. Since the eccentric shaft 8 acts directly on the slider 9 instead of the plunger core 61, the radial force originally borne by the plunger core 61 is transferred to the slider 9. The plunger core 61 is only subjected to the axial force applied by the slider 9, which significantly reduces the friction between the plunger core 61 and the inner wall of the plunger sleeve 62, thereby greatly slowing down the wear rate of the plunger assembly 6. On the other hand, although the structure of this application can greatly slow down the wear rate of the plunger assembly 6, the plunger assembly 6 is, after all, a moving part, and wear is inevitable. By detachably connecting the plunger assembly 6 to the pump head 4 and the pump housing 3, not only can the plunger core 61 be removed, but the plunger sleeve 62 can also be removed, allowing the plunger assembly 6 to be replaced as a whole, ensuring that the heavy-duty plunger pump can be used for a longer period of time. The plunger sleeve 62 is sealed to the pump head 4 and the pump housing 3 through a two-layer sealing structure of a sealing gasket and a sealing sleeve 65, which makes it difficult for the lubricating grease in the pump head 4 to leak and prevents external dust from entering the pump head 4 and the pump housing 3.

[0040] The specific structure of the single-line columnar dispenser is existing technology, including a control piston with a channel, a metering piston, a metering chamber, a dispensing chamber, a lubricant inlet, a lubricant outlet, a first return spring, and a second return spring. The control piston moves from the starting position to the metering position under lubricant pressure, overcoming the action of the first return spring. In the starting position, the channel of the control piston and the connecting passage connect the dispensing chamber and the metering chamber. In the metering position, the connecting passage connects the lubricant inlet to the metering chamber, and the metering piston, overcoming the action of the second return spring, squeezes the lubricant in the dispensing chamber out of the lubricant outlet. During the decompression process at the lubricant inlet, the control piston is pushed back to its starting position by the first return spring, while the metering piston is pushed back to its starting position by the second return spring.

[0041] An embodiment of the second type of heavy-duty pump lubrication system of this utility model: as follows Figure 2 As shown, the heavy-duty pump block lubrication system includes a heavy-duty pump 10 and a single-line columnar distributor 12. The heavy-duty pump 10 has the same structure as in the above embodiment and will not be described again. The specific structure of the single-line columnar distributor 12 is prior art, including a housing, at least one lubricant inlet, at least one lubricant outlet, a control piston, a first control space, a second control space, a metering piston, a first metering chamber, a second metering chamber, a first channel, a second channel, and an outlet connecting channel. The control piston guides the lubricant from the lubricant inlet to the first metering chamber or the second metering chamber. Under the action of lubricant pressure, the metering piston squeezes the lubricant in the first metering chamber or the second metering chamber along the outlet connecting channel to the lubricant outlet. The first metering chamber and the second metering chamber are both connected to at least one lubricant outlet. The first channel connects the second metering chamber to the lubricant inlet or the lubricant outlet, and the second channel connects the first metering chamber to the lubricant inlet or the lubricant outlet. The control piston has a first switch state and a second switch state. In the first switch state, the lubricant inlet is connected to the second metering chamber through the first control space and the first channel. In the second switch state, the lubricant inlet is connected to the first metering chamber through the second control space and the second channel.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. Heavy duty pump lubrication system comprising a heavy duty pump and a single line columnar distributor comprising a control piston, a metering piston, characterized in that, The heavy pump comprises an eccentric shaft and a slider, the slider is sleeved on the eccentric shaft to make linear reciprocating motion with the rotation of the eccentric shaft, the end of the slider is provided with a T-shaped hanging groove for hanging connection with the hanging head of the plunger pair; the single-line columnar distributor further comprises a first reset spring and a second reset spring, the first reset spring is used to provide force for the control piston to return to the initial position; the second reset spring is used to provide force for the metering piston to return to the initial position; the lubricant outlet of the heavy pump is communicated with the lubricant inlet of the single-line columnar distributor, and the lubricant outlet of the single-line columnar distributor is used to communicate with the lubrication site.

2. The heavy duty pump lubrication system of claim 1, wherein, The heavy pump further comprises a pump head, the pump head is disc-shaped, and a rectangular groove is arranged in the middle of the pump head, and the slider is assembled in the rectangular groove.

3. The heavy duty pump lubrication system of claim 2, wherein, The middle of the slider has a waist-shaped hole, the output end of the eccentric shaft is inserted into the waist-shaped hole, and the waist-shaped hole extends along a direction perpendicular to the sliding direction of the slider.

4. The heavy duty pump lubrication system of claim 2, wherein, The heavy pump further comprises a pump shell, which is cylindrical and sleeved outside the pump head, first plunger mounting holes are arranged on the side walls at both ends of the rectangular groove, respectively, the two first plunger mounting holes are coaxially arranged and penetrate through the pump head, and second plunger mounting holes are arranged on the pump shell in one-to-one correspondence with the first plunger mounting holes.

5. The heavy duty pump lubrication system of claim 4, wherein, The plunger pair has two, which are respectively installed in the pump head through the first and second plunger mounting holes.

6. The heavy duty pump lubrication system of claim 2, wherein, Resilient wear-resistant guide plates are fixedly installed on the side walls at both length directions of the rectangular groove, respectively, and the slider is in sliding cooperation with the two resilient wear-resistant guide plates.

7. A heavy duty pump lubrication system comprising a heavy duty pump and a single line block dispenser, said single line block dispenser comprising a lubricant inlet, a control piston, a first metering chamber and a second metering chamber, characterized in that, The heavy pump comprises an eccentric shaft and a slider, the slider is sleeved on the eccentric shaft to make linear reciprocating motion with the rotation of the eccentric shaft, the end of the slider is provided with a T-shaped hanging groove for hanging connection with the hanging head of the plunger pair; the single-line columnar distributor further comprises a first reset spring and a second reset spring, the first reset spring is used to provide force for the control piston to return to the initial position; the second reset spring is used to provide force for the metering piston to return to the initial position; the lubricant outlet of the heavy pump is communicated with the lubricant inlet of the single-line columnar distributor, and the lubricant outlet of the single-line columnar distributor is used to communicate with the lubrication site.

8. The heavy duty pump lubrication system of claim 7, wherein, The heavy pump further comprises a pump head, the pump head is disc-shaped, and a rectangular groove is arranged in the middle of the pump head, and the slider is assembled in the rectangular groove.

9. The heavy duty pump lubrication system of claim 8, wherein, The middle of the slider has a waist-shaped hole, the output end of the eccentric shaft is inserted into the waist-shaped hole, and the waist-shaped hole extends along a direction perpendicular to the sliding direction of the slider.

10. The heavy duty pump lubrication system of claim 8, wherein, The heavy pump further comprises a pump shell, which is cylindrical and sleeved outside the pump head, first plunger mounting holes are arranged on the side walls at both ends of the rectangular groove, respectively, the two first plunger mounting holes are coaxially arranged and penetrate through the pump head, and second plunger mounting holes are arranged on the pump shell in one-to-one correspondence with the first plunger mounting holes.

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