A multi-layered sliding block pump

Abstract

The application discloses a multilayer sliding block pump, which comprises a shell, a sliding assembly and a crankshaft, a partition block is arranged in the shell and is shaped as a plurality of large sliding grooves for accommodating the sliding assembly, the sliding assembly is a sliding frame and a sliding block in relative motion, oil through holes are formed in the sliding frame and the sliding block, a plurality of eccentric structure sections are arranged on the crankshaft and are distributed reversely or spirally, each eccentric structure section is arranged in cooperation with the sliding assembly to drive the sliding assembly to move, a half-ring groove is arranged on the eccentric structure section and is communicated with the oil through hole and an oil inlet and outlet channel, the oil inlet and outlet channel is a plurality of independent channels which are formed along the axial direction of the crankshaft and are communicated with the ring groove and the oil inlet and outlet hole formed on the partition block. The multilayer sliding block pump has the characteristics of small working noise of the pump body, multiple working chambers, simple structure of the pump body, strong universality of parts, good structural expandability, short design cycle of replacement, low cost and the like.

Description

Technical Field

[0001] This invention belongs to the field of pump technology for fluid transport and pressurization, and specifically relates to a multi-layer slider pump. Background Technology

[0002] Positive displacement pumps are widely used in daily life and various industries. There are many types of pumps used for fluid transportation and pressurization. Among them, the slider pump can maintain seamless motion contact, has a wear compensation function for the contact pair, and has a long service life. However, most of them work by changing the volume of the chamber one by one and using a single inlet and outlet port, which has disadvantages such as low working efficiency, large fluid pulsation, and unstable working state.

[0003] Existing technologies also include multi-chamber sliding block pumps, which use a single eccentric crankshaft to drive a set of relatively sliding sliders to achieve alternating operation of the chambers. This offers high working efficiency and volumetric efficiency. However, because the movement of the sliders is driven by an eccentric shaft (i.e., the sliders move eccentrically relative to the pump body axis), the slider movement span is large. In actual use, this results in severe pump body vibration, high operating noise, and significant wear on components. Furthermore, existing multi-chamber sliding block pumps have inlet and outlet ports at the end caps for connection to external oil circuits, limiting their application to pumps with only a single working chamber and lacking scalability. When higher power output is required, multiple pumps must operate in tandem, or a new pump body with higher power must be designed. The former involves more equipment, complex control, and poor controllability of output power stability, while the latter suffers from long design cycles, low component versatility, long manufacturing cycles, and high costs. Summary of the Invention

[0004] The purpose of this invention is to propose a multi-layer slider pump, which, compared with the existing single crankshaft driven slider pump, has the characteristics of low pump body operating noise, multiple working chambers, simple pump body structure, strong component versatility, and good structural expandability.

[0005] This invention is achieved through the following technical solution: This invention proposes a multi-layer slider pump, the structure of which includes a housing, a sliding assembly, and a crankshaft. The housing forms a large sliding groove, and the sliding assembly includes a sliding frame and a slider. The sliding frame is slidably placed in the large sliding groove, and a small sliding groove is provided in the sliding frame. The slider is slidably arranged in the small sliding groove, and an inner shaft hole is opened in the slider. Oil passage holes are opened on the sliding frame and the slider. The crankshaft is disposed through the housing and the sliding assembly. The crankshaft includes an eccentric structural section that is configured to cooperate with the inner shaft hole. A pair of semi-annular grooves opposite to the oil passage holes are opened on the eccentric structural section. Oil inlet and outlet passages are opened along the axial direction of the crankshaft. The semi-annular grooves connect the oil passage holes and the oil inlet and outlet passages. The oil inlet and outlet passages are connected to the oil inlet and outlet holes opened on the housing. The housing is provided with several partition blocks, which divide the housing into several large sliding grooves. There are also several sliding assemblies and several eccentric structural sections. The eccentric structural sections are arranged in opposite directions or spirally distributed perpendicular to the axis of the crankshaft. By adopting the above technical solutions, multiple sliding components are arranged in opposite or spiral distributions, which drive the sliding components to move in opposite or symmetrical directions. This can cancel out the forces transmitted to the housing, eliminate vibration during pump operation, and effectively reduce operating noise. At the same time, the spirally and uniformly arranged eccentric structural sections on the power shaft facilitate the rapid expansion design of the pump body according to usage needs. The high versatility of parts effectively shortens the design and manufacturing cycle of similar products and reduces R&D and production costs.

[0006] Furthermore, the oil inlet and outlet holes are provided on the partition block, and the oil inlet and outlet holes are located on the same side of the partition block or on opposite sides of the partition block. Annular grooves are provided on the partition block and / or the crankshaft, and the annular grooves connect the oil inlet / outlet channels and the oil inlet / outlet holes. The oil inlet / outlet channels are several independently set channels, each extending from the eccentric structure section to the annular groove; this allows for oil inlet and outlet at the middle part of the pump body, resulting in a simpler structure.

[0007] Preferably, the number of the large slide groove, the sliding assembly, and the eccentric structural section are all even. The sliding assembly is symmetrically arranged relative to the partition block, and the eccentric structural section and the inlet and outlet oil passages are symmetrically arranged relative to the crankshaft center, so that the force transmitted to the housing is the same in magnitude and opposite in direction, further eliminating housing vibration.

[0008] Preferably, the number of the large slide groove, the sliding assembly, and the eccentric structural section is an odd number of no less than three. The eccentric structural section and the inlet and outlet oil passages are spirally distributed relative to the crankshaft axis. According to a specific spiral rotation angle, the magnitude of the force transmitted to the housing can cancel each other out to eliminate housing vibration.

[0009] Furthermore, the large slide groove and the small slide groove are quadrangular prism-shaped cavities, and the slide frame and the slider are also prism-shaped structures; Preferably, the slider has several cavities arranged parallel to each other around the inner shaft hole to save pump body manufacturing materials and achieve lightweight design.

[0010] Furthermore, the large slide groove and the small slide groove are a combination of a cylindrical cavity and an elliptical cylinder cavity, and the slide frame and the slider are also correspondingly arranged cylindrical or elliptical cylinder structures.

[0011] Furthermore, the housing is assembled from a front cover, a rear cover, and several outer shell sections, which are connected by the partition blocks to improve the convenience of processing, assembly, and maintenance.

[0012] Preferably, the connections between the front cover, the rear cover, the outer shell, and the partition block are all provided with sealing elements to ensure the overall sealing of the large slide groove and adapt to high-pressure applications.

[0013] Preferably, the crankshaft is connected to the front cover and the rear cover via bearings. The connection between the crankshaft and the front cover is also provided with a skeleton oil seal and a retaining ring to reduce the friction between the crankshaft and the housing, reduce the ineffective loss of the drive motor, and improve the sealing performance at the connection between the housing and the crankshaft. Beneficial effects

[0014] One of the above technical solutions has the following advantages or beneficial effects: To address the issues of high vibration, high operating noise, and poor expandability in existing multi-chamber slider pumps driven by a single crankshaft, multiple eccentric structural sections are centrally symmetrically or spirally distributed on the crankshaft. Corresponding sliding components and inlet / outlet oil passages are installed on each eccentric structural section. During crankshaft rotation, the eccentric structural sections always rotate in opposite directions relative to the crankshaft axis, driving the sliding components to move in opposite directions. This causes the vibration forces transmitted to the pump body to cancel each other out, effectively eliminating operating noise and reducing loosening or wear of connecting parts caused by vibration, thus extending the pump's service life.

[0015] By placing the oil inlet and outlet holes on the partition block, the oil inlet and outlet channels corresponding to the sliding component are connected to the oil inlet and outlet holes through the annular groove, thus enabling oil to enter and exit the middle part of the pump body. This results in a simpler structure and higher volume utilization.

[0016] By using multiple sets of sliding components, partition blocks, and a single crankshaft, the number of chambers for wheel-driven operation is increased under the premise of a single drive source, further improving working efficiency. Furthermore, by uniformly arranging eccentric structural sections in a spiral pattern, the pump body can be quickly expanded according to usage requirements, improving the versatility of parts, effectively shortening the design and manufacturing cycle of the series of products, and reducing R&D and production costs. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the separator block structure of the present invention; Figure 4 This is a schematic diagram of the crankshaft structure of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the AA surface structure; Figure 6 For the present invention Figure 4 Schematic diagram of the mid-BB surface structure; Figure 7 For the present invention Figure 4 Schematic diagram of the CC and DD plane structures; Figure 8 This is a three-dimensional structural diagram of Embodiment 2 of the present invention; Figure 9 This is a three-dimensional structural diagram of Embodiment 3 of the present invention; In the figure: 1. Housing; 10. Separator block; 101. Oil inlet / outlet hole; 102. Annular groove; 11. Front cover; 12. Rear cover; 13. Outer shell; 14. Large slide groove; 15. End cover; 2. Sliding assembly; 21. Slide frame; 211. Small slide groove; 22. Slider; 221. Inner shaft hole; 23. Oil passage hole; 3. Crankshaft; 3. Eccentric structure section; 31. Semi-annular groove; 32. Oil inlet / outlet passage; 4. Bearing; 5. Skeleton oil seal; 6. Snap ring; 7. Seal. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to embodiments, but the implementation of the present invention is not limited thereto. Example

[0019] The housing 1 includes a front cover 11, a rear cover 12, several outer shell sections 13, and several partition blocks 10. The outer surface of the front cover 11 has a groove for cooperating with a drive motor. The outer shell sections 13 are fixedly connected to the partition blocks 10, forming an even number of large quadrangular prism-shaped sliding grooves 14. The outermost outer shell section 13 is also bolted to the front cover 11 and the rear cover 12 respectively. Sealing elements 7 are provided at the connections between the front cover 11, the rear cover 12, the outer shell sections 13, and the partition blocks 10 to ensure the overall sealing of the large sliding grooves. Figure 1-3The outer casing 13 consists of two sections, and the partition block 10 is a single block. The partition block 10 is an oil passage block, which has an oil inlet / outlet hole 101 and a pair of annular grooves 102 communicating with the oil inlet / outlet hole 101. Preferably, the oil inlet / outlet hole 101 is located on the opposite side of the partition block 10. Alternatively, the annular grooves 102 can also be located on the crankshaft 3 or opposite annular grooves 102 can be located on the partition block 10 and the crankshaft 3. The sliding component 2 is a double array, such as Figures 1-2 As shown, the sliding components 2 are arranged in two sets symmetrically relative to the separator block 10. Each set of sliding components 2 includes a quadrangular prism-shaped sliding frame 21 and a slider 22. The sliding frame 21 is slidably placed in the large sliding groove 14. The axial direction of the large sliding groove 14 is the same as the movement direction of the sliding frame 21. The sliding frame 21 is provided with a quadrangular prism-shaped small sliding groove 211. The opening direction of the small sliding groove 211 is perpendicular to both the axis of the crankshaft 3 and the movement direction of the large sliding groove 14. The slider 22 is slidably arranged in the small sliding groove 211. The slider 22 has an inner shaft hole 221 opened along the axial direction of the crankshaft 3. Several cavities are arranged parallel around 221 to reduce material usage. Oil passage holes 23 are provided on the slide frame 21 and the slider 22. The oil passage holes 23 are connected to and interconnected with the working chamber. Specifically, an external oil passage hole is provided on the slide frame 21 along its movement direction. The external oil passage hole is connected to the working chamber formed by the large sliding groove of the slide frame 21. A pair of internal oil passage holes are provided on the slider 22 along the movement direction of the slide frame 21 and the movement direction of the slider 22. The internal oil passage holes along the movement direction of the slide frame 21 are connected to the external oil passage hole. The internal oil passage holes along the movement direction of the slider 22 are connected to the working chamber formed by the small sliding groove of the slider 22. The crankshaft 3 passes through the housing 1 and the sliding assembly 2. The crankshaft 3 is connected to the front cover 11 and the rear cover 12 via bearings 4. At the connection point between the crankshaft 3 and the front cover 11, a skeleton oil seal 5 and a retaining ring 6 are also provided on the outside of the bearing 4. Figures 4-7 As shown, the crankshaft 3 is provided with two eccentric structural sections 31. The eccentric structural sections 31 are arranged in opposite directions relative to the axis of the crankshaft 3 and cooperate with the inner shaft hole 221 to drive the sliding assembly 2 to move. Each eccentric structural section 31 has a pair of semi-annular grooves 311. The semi-annular grooves 311 connect the oil passage 23 and the oil inlet and outlet passages 32. The oil inlet and outlet passages 32 are opened along the axial direction of the crankshaft 3 and extend from the eccentric structural section 31 to the annular groove 102 opened on the partition block 10, and communicate with the oil inlet and outlet hole 101 through the annular groove 102. Correspondingly, the oil inlet and outlet passages 32 are two sets of independently arranged. The eccentric structural sections 31 and the oil inlet and outlet passages 32 are symmetrically arranged with respect to the center point of the crankshaft 3 so that the force transmitted to the housing 1 has the same magnitude and opposite direction, canceling each other out and eliminating the vibration of the housing 1.

[0020] In the aforementioned scheme, as a feasible option, the oil inlet / outlet holes 101 and the annular groove 102 are set on the rear cover 12, and the oil inlet / outlet channels 32 are set as a group. The two groups of sliding components 2 are respectively connected to the same group of oil inlet / outlet channels 32 through the semi-annular groove 311. As another feasible option, the oil inlet / outlet channels 32 can also be designed as two parallel groups of one long and one short, which are respectively connected to the two groups of sliding components 2. Both groups of oil inlet / outlet channels 32 are connected to the annular groove 102 and are connected to the external oil inlet / outlet circuit through the oil inlet / outlet holes 101 opened on the rear cover 12. Example

[0021] This embodiment proposes a multi-layer slider pump, which differs from Embodiment 1 in that: like Figure 8 As shown, one of the outer casings 13 is provided with an end cap 15. The crankshaft 3 passes through the outer casing 13 and the sliding assembly 2. The oil inlet / outlet hole 101 is located inside the end cap 15. The sliding assembly 2 consists of two sets symmetrically arranged relative to the partition block 10. The large slide groove 14 and the small slide groove 211 are fitted with cylindrical and elliptical cylindrical cavities, respectively. The sliding frame 21 and the slider 22 are also correspondingly arranged cylindrical or elliptical cylindrical structures. In one specific configuration, the large slide groove 14 is a cylindrical cavity, and a cylindrical sliding frame 21 is slidably arranged inside the large slide groove 14. An elliptical cylindrical small slide groove 211 is opened inside the sliding frame 21, and an elliptical cylindrical slider 22 is slidably arranged inside the small slide groove 211. Conversely, the large slide groove 14 and the sliding frame 21 are set as elliptical cylindrical, and the small slide groove 211 and the slider 22 are set as cylindrical. Compared to Embodiment 1, the sliding component 2 structure of this embodiment has higher and more complete surface sealing performance, and can be used in scenarios requiring higher working pressure.

[0022] Other components not described in this embodiment, as well as the connection relationships, positional relationships, functions, and usage methods between components, are the same as in Embodiment 1. Example

[0023] This embodiment proposes a multi-layer slider pump, which differs from Embodiments 1 or 2 in that: the sliding component 2 and the eccentric structural segment 31 are at least three or more in an odd number, such as... Figure 9 As shown, the eccentric structure segment 31 consists of three spirally and evenly distributed on the same crankshaft 3. The relative rotation angle between adjacent eccentric structure segments 31 is set to 120°. There are two partition blocks 10, and each partition block 10 has an oil inlet / outlet hole 101 and an annular groove 102 that communicate with the oil inlet / outlet passage 32.

[0024] Note: If the technical features described in the embodiments of this application are not fully understood, such as the structural features of components like the sliding component 2 and the oil passage 23, as well as their cooperation relationship and working mode with other components, the contents described in the specifications of earlier applications CN202311040974.8 and CN202322921250.6 can be used as supplementary solutions.

[0025] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-layer slider pump, comprising a housing (1), a sliding assembly (2), and a crankshaft (3), wherein the housing (1) is provided with a large sliding groove (14), the sliding assembly (2) includes a sliding frame (21) and a slider (22), the sliding frame (21) is slidably placed in the large sliding groove (14), the sliding frame (21) is provided with a small sliding groove (211), the slider (22) is slidably arranged in the small sliding groove (211), the slider (22) is provided with an inner shaft hole (221), and the sliding frame (21) and the slider (22) are provided with communicating oil passage holes (23). The crankshaft (3) is disposed through the housing (1) and the sliding assembly (2). The crankshaft (3) includes an eccentric structural section (31) that is configured to cooperate with the inner shaft hole (221). A pair of semi-annular grooves (311) opposite to the oil passage (23) are provided on the eccentric structural section (31). The crankshaft (3) is provided with an oil passage (32) along the axial direction. The semi-annular groove (311) connects the oil passage (23) and the oil passage (32). The oil passage (32) communicates with the oil passage (101) provided on the housing (1). Its features are: The housing (1) is provided with several partition blocks (10), which divide the housing (1) into several large sliding grooves (14). The sliding component (2) and the eccentric structure segment (31) are also several. The eccentric structure segment (31) is arranged in opposite directions or in a spiral uniform distribution perpendicular to the axis of the crankshaft (3).

2. A multi-layer sliding block pump according to claim 1, characterized in that: The oil inlet and outlet holes (101) are provided on the partition block (10). The oil inlet and outlet holes (101) are located on the same side of the partition block (10) or on opposite sides of the partition block (10). The partition block (10) and / or the crankshaft (3) are provided with an annular groove (102). The annular groove (102) connects the oil inlet and outlet passages (32) and the oil inlet and outlet holes (101). The oil inlet and outlet passages (32) are several independently set channels. The oil inlet and outlet passages (32) extend from the eccentric structure section (31) to the annular groove (102).

3. A multi-layer slider pump according to claim 1, characterized in that: The number of the large slide groove (14), the sliding component (2) and the eccentric structural section (31) are all even. The sliding component (2) is symmetrically arranged relative to the partition block (10), and the eccentric structural section (31) and the inlet and outlet oil passages (32) are symmetrically arranged relative to the crankshaft (3).

4. A multi-layer sliding block pump according to claim 1, characterized in that: The number of the large slide groove (14), the sliding component (2) and the eccentric structural section (31) is an odd number of no less than three. The eccentric structural section (31) and the inlet and outlet oil passages (32) are evenly distributed in a spiral shape relative to the axis of the crankshaft (3).

5. A multi-layer slider pump according to any one of claims 1-4, characterized in that: The large slide (14) and the small slide (211) are quadrangular prism cavities, and the slide frame (21) and the slider (22) are also prism structures.

6. A multi-layer slider pump according to claim 5, characterized in that: The slider (22) has several cavities arranged parallel to each other around the inner shaft hole (221).

7. A multi-layer slider pump according to any one of claims 1-4, characterized in that: The large slide groove (14) and the small slide groove (211) are a combination of a cylindrical cavity and an elliptical cylinder cavity. The slide frame (21) and the slider (22) are also correspondingly set cylindrical or elliptical cylinder structures.

8. A multi-layer slider pump according to claim 1, characterized in that: The housing (1) is assembled from a front cover (11), a rear cover (12) and several outer shell sections (13), which are connected by the partition block (10).

9. A multi-layer slider pump according to claim 8, characterized in that: The front cover (11), the rear cover (12), the outer shell (13) and the partition block (10) are all provided with sealing elements (7).

10. A multi-layer slider pump according to claim 8, characterized in that: The crankshaft (3) is connected to the front cover (11) and the rear cover (12) via bearings (4). The connection between the crankshaft (3) and the front cover (11) is also provided with a skeleton oil seal (5) and a snap ring (6).

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