Pressure supply device suitable for sliding bearing and pump equipped with pressure supply device
By designing a pressure supply device including a self-balancing device, the problem of uneven pressure supply of sliding bearings is solved, and the self-balancing pressure supply of sliding bearings is achieved, which ensures the boosting and lubrication effect and improves the stability of sliding bearings.
Patent Information
- Application Number
- CN202510189233.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-05-09
AI Technical Summary
The existing pressure supply devices suitable for sliding bearings lack guidance and control structures, resulting in uneven pressure at the bearing supply port, which may lead to pressure relief, lubricating medium return, etc., affecting the pressure boosting effect of sliding bearings.
A pressure supply device including a pressure supply body and a plurality of self-balancing devices is designed. The self-balancing device consists of elastic components and a plug. Under the action of the lubricating medium, the plug can move the liquid inlet of the pressure supply channel to open or close the pressure supply channel to achieve self-balancing pressure supply to the sliding bearing.
Through the design of the self-balancing device, the pressure supply can be automatically adjusted when the journal is eccentric, preventing pressure backflow, ensuring the boosting effect and lubrication effect of the sliding bearing, reducing friction and wear between the bearing shell and the journal, and improving the stability of the sliding bearing.
Smart Images
Figure CN119957613A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of pressure supply equipment, and in particular to a pressure supply device suitable for a sliding bearing and a pump equipped with the pressure supply device. Background Art
[0002] Sliding bearings are bearings that generate direct or indirect sliding friction between the bearing and the support surface of the journal. According to the way the lubricating film is formed, they can be divided into static sliding bearings, dynamic sliding bearings and dynamic and static sliding bearings. Dynamic and static sliding bearings have been widely used in multi-stage pumps. They mainly use fluid dynamic pressure and additional pressure supply to separate the journal from the bearing bushing, and form a lubricating film in the gap between the journal and the bushing, thereby providing lubrication and reducing the wear between the journal and the bushing. However, in actual applications, dynamic and static sliding bearings have problems such as uneven pressure supply at multiple bearing pressure supply ports. At present, the problem of uneven pressure supply is mostly solved by optimizing the structure of dynamic and static sliding bearings. The existing pressure supply device suitable for sliding bearings lacks corresponding guidance and control structures. When the journal is too eccentric to one side, the pressure at the corresponding bearing pressure supply port on that side will be too high, even exceeding the pressure supply pressure of the pressure supply body, which is prone to pressure relief and lubricating medium reflux, affecting the pressurization effect of the sliding bearing. Summary of the invention
[0003] The purpose of the present invention is to provide a pressure supply device suitable for a sliding bearing and a pump equipped with the pressure supply device, so as to solve the problems existing in the prior art, ensure the pressurization effect of the sliding bearing, ensure the lubrication effect of the bearing shell and the shaft neck, reduce the friction and wear between the bearing shell and the shaft neck, and improve the stability of the sliding bearing.
[0004] To achieve the above object, the present invention provides the following solutions:
[0005] The present invention provides a pressure supply device suitable for a sliding bearing, comprising a pressure supply body and a plurality of self-balancing devices, wherein the pressure supply body has at least one total pressure supply port and a plurality of pressure supply channels, wherein the liquid inlet of each of the pressure supply channels is connected to one of the total pressure supply ports, and the liquid outlet of each of the pressure supply channels is used to communicate with the bearing pressure supply port of the sliding bearing, and the total pressure supply port is used to supply lubricating medium into the pressure supply body;
[0006] Each of the self-balancing devices includes an elastic component and a plug. Each of the pressure supply channels is provided with a self-balancing device. One end of the elastic component of each of the self-balancing devices is connected to or abutted against the self-balancing device, and the plug of each of the self-balancing devices is connected to or abutted against the other end of the elastic component of each of the self-balancing devices. Each of the plugs is provided at the liquid inlet end of the corresponding pressure supply channel. The plug of each of the self-balancing devices can close the liquid inlet of the corresponding pressure supply channel under the elastic force of the elastic component of each of the self-balancing devices. Each of the plugs can move toward a side close to the corresponding elastic component and open the liquid inlet of the corresponding pressure supply channel under the action of the lubricating medium entering through the liquid inlet of the corresponding pressure supply channel.
[0007] Preferably, the size of the liquid inlet end of each pressure supply channel is smaller than the size of the liquid outlet end of each pressure supply channel, and each plug can increase the flow rate of the lubricating medium entering the corresponding pressure supply channel by moving along the corresponding pressure supply channel away from the liquid inlet end of the corresponding pressure supply channel.
[0008] Preferably, each of the pressure supply channels has a working section, each of the working ends is provided with a plug and an elastic component, and the diameter of each of the working sections increases gradually or in a step-like manner from the liquid inlet end to the liquid outlet end of each of the working sections.
[0009] Preferably, each of the plugs is spherical, and the cross-section of each of the pressure supply channels is circular.
[0010] Preferably, under the buoyancy of the lubricating medium, the spherical center of each plug can be maintained on the axis of the corresponding pressure supply channel.
[0011] Preferably, it also includes multiple connecting pipes and multiple gaskets, the liquid inlet end of each connecting pipe is threadedly connected and communicated with the liquid outlet end of one of the pressure supply channels of the pressure supply body, and the liquid outlet end of each connecting pipe is communicated with one of the bearing pressure supply ports; an annular groove is provided on the inner side wall of the liquid inlet end of each connecting pipe, a gasket is arranged in each of the annular grooves, and a through hole is provided on each of the gaskets; the two ends of each gasket are respectively abutted against the inner bottom wall of an annular groove and one end of the corresponding elastic component away from the corresponding plug.
[0012] Preferably, the pressure supply body comprises at least two pressure supply units, and each of the pressure supply units has one total pressure supply port and two pressure supply channels.
[0013] Preferably, the number of the pressure supply channels of the pressure supply body is the same as the number of the bearing pressure supply ports of the sliding bearing, the number of the self-balancing devices, the pressure supply channels, the gaskets and the connecting pipes are the same, and the axes of all the pressure supply channels are parallel or collinear with each other.
[0014] The present invention also provides a pump equipped with a pressure supply device, including a pump shaft, the sliding bearing and the pressure supply device suitable for the sliding bearing, the pump shaft sleeve is arranged in the sliding bearing, and the multiple bearing pressure supply ports of the sliding bearing are all connected to one of the pressure supply channels of the pressure supply body.
[0015] Preferably, it also includes a pump housing and a plurality of guide members, the sliding bearing is arranged in the pump housing, a plurality of pump pressure supply ports are arranged on the pump housing, each of the guide members is provided with a guide channel, the pump pressure supply port and the bearing pressure supply port correspond to each other one by one, a guide member is arranged between each pump pressure supply port and the corresponding bearing pressure supply port, each pump pressure supply port is connected with a liquid outlet of a pressure supply channel, and both ends of each guide channel are respectively connected with the corresponding pump pressure supply port and the corresponding bearing pressure supply port.
[0016] Compared with the prior art, the present invention has achieved the following technical effects:
[0017] The present invention provides a pressure supply device suitable for a sliding bearing and a pump equipped with the pressure supply device, comprising a pressure supply body and a plurality of self-balancing devices, each of which comprises an elastic component and a plug, and each pressure supply channel is provided with a self-balancing device, one end of the elastic component of each balancing device is connected or abutted with the respective balancing device, and the plug of each balancing device is connected or abutted with the other end of the elastic component of the respective balancing device, and each plug is provided at the liquid inlet end of the corresponding pressure supply channel, and the plug of each balancing device can close the liquid inlet of the corresponding pressure supply channel under the elastic force of the elastic component of the respective balancing device, and each plug can move to a side close to the corresponding elastic component and open the liquid inlet of the corresponding pressure supply channel under the action of the lubricating medium entering from the liquid inlet of the corresponding pressure supply channel.
[0018] The lubricating medium is introduced into each pressure supply channel through the total pressure supply port. Under the action of the lubricating medium, the plug compresses the elastic component and moves to the liquid outlet end of the medium channel, thereby opening the liquid inlet and realizing the pressure supply to the sliding bearing. When the journal in the sliding bearing deviates to one side in the radial direction, the pressure at the corresponding bearing pressure supply port on this side will increase suddenly. Under the action of the bearing end pressure of the plug and the elastic component, the plug moves to the pressure supply end, which can close the liquid inlet of the pressure supply channel, prevent the occurrence of pressure reflux and other phenomena, ensure the pressurization effect of the sliding bearing, ensure the lubrication effect of the bearing shell and the journal, reduce the friction and wear between the bearing shell and the journal, and improve the stability of the sliding bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic structural diagram of a pressure supply device applicable to a sliding bearing provided in Example 1;
[0021] Figure 2 A schematic diagram of a partial structure of a pressure supply device applicable to a sliding bearing provided in Example 1;
[0022] Figure 3 A partial exploded view of a pressure supply device for a sliding bearing provided in Example 1;
[0023] Figure 4 A schematic diagram of the structure of a pump provided with a pressure supply device provided in Example 2;
[0024] Figure 5 A schematic diagram of a partial structure of a pump provided with a pressure supply device provided in Example 2;
[0025] Figure 6 A schematic diagram of the structure of the bearing bush provided in Example 2;
[0026] In the figure: 100, a pressure supply device suitable for a sliding bearing; 200, a pump equipped with a pressure supply device; 1, a pressure supply body; 101, a total pressure supply port; 102, a pressure supply channel; 103, a working section; 104, a pressure supply unit; 2, a self-balancing device; 201, an elastic component; 202, a plug; 3, a sliding bearing; 301, a bearing pressure supply port; 302, a bearing shell; 303, a pressure supply groove; 4, a connecting pipeline; 401, an annular groove; 5, a gasket; 501, a through hole; 6, a pump shaft; 7, a pump housing; 701, a pump pressure supply port; 8, a flow guide; 9, an annular support; α, an angle; b, depth. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] The purpose of the present invention is to provide a pressure supply device suitable for a sliding bearing and a pump equipped with the pressure supply device, so as to solve the problems existing in the prior art, ensure the pressurization effect of the sliding bearing, ensure the lubrication effect of the bearing shell and the shaft neck, reduce the friction and wear between the bearing shell and the shaft neck, and improve the stability of the sliding bearing.
[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0030] Example 1
[0031] like Figures 1 to 3 As shown, this embodiment provides a pressure supply device 100 suitable for a sliding bearing, comprising a pressure supply body 1 and a plurality of self-balancing devices 2, wherein:
[0032] The pressure supply body 1 has at least one total pressure supply port 101 and a plurality of pressure supply channels 102. The liquid inlet of each pressure supply channel 102 is connected to one total pressure supply port 101. The liquid outlet of each pressure supply channel 102 is used to communicate with the bearing pressure supply port 301 of the sliding bearing 3. The total pressure supply port 101 is used to supply lubricating medium into the pressure supply body 1.
[0033] Each balancing device 2 includes an elastic component 201 and a plug 202. A self-balancing device 2 is arranged in each pressure supply channel 102. One end of the elastic component 201 of each balancing device 2 is connected or abutted with the respective balancing device 2. The plug 202 of each balancing device 2 is connected or abutted with the other end of the elastic component 201 of the respective balancing device 2. Each plug 202 is arranged at the liquid inlet end of the corresponding pressure supply channel 102. The plug 202 of each balancing device 2 can close the liquid inlet of the corresponding pressure supply channel 102 under the elastic force of the elastic component 201 of the respective balancing device 2. Each plug 202 can move to a side close to the corresponding elastic component 201 and open the liquid inlet of the corresponding pressure supply channel 102 under the action of the lubricating medium entering from the liquid inlet of the corresponding pressure supply channel 102.
[0034] The lubricating medium is introduced into each pressure supply channel 102 through the total pressure supply port 101. Under the action of the lubricating medium, the plug 202 compresses the elastic component 201 and moves toward the liquid outlet end of the medium channel, thereby opening the liquid inlet and realizing the pressure supply to the sliding bearing 3. When the journal in the sliding bearing 3 deviates to one side in the radial direction, the pressure at the corresponding bearing pressure supply port 301 on this side will increase suddenly. Under the action of the bearing end pressure of the plug 202 and the elastic component 201, the plug 202 moves toward the pressure supply end, which can close the liquid inlet of the pressure supply channel 102, prevent the occurrence of pressure reflux and other phenomena, ensure the pressurization effect of the sliding bearing 3, ensure the lubrication effect of the bearing bush 302 and the journal, reduce the friction and wear between the bush 302 and the journal, and improve the stability of the sliding bearing 3.
[0035] In this embodiment, the size of the liquid inlet end of each pressure supply channel 102 is smaller than the size of the liquid outlet end of each pressure supply channel 102, and each plug 202 can increase the flow rate of the lubricating medium entering the corresponding pressure supply channel 102 by moving along the corresponding pressure supply channel 102 toward the liquid inlet end away from the corresponding pressure supply channel 102. When the journal in the sliding bearing 3 deviates to one side in the radial direction, the pressure at the corresponding bearing pressure supply port 301 on this side increases. Under the action of the bearing end pressure of the plug 202 and the elastic component 201, the plug 202 moves toward the pressure supply end, which can reduce the flow rate of the supplied lubricating medium and prevent the pressure at the corresponding bearing pressure supply port 301 from further increasing, thereby preventing the sum of the bearing end pressure of the plug 202 and the elastic force of the elastic component 201 from exceeding the pressure at the pressure supply end to generate pressure reflux, and the degree of flow reduction can be adaptively adjusted according to the offset of the journal, thereby improving the self-balancing effect of the pressure supply.
[0036] In this embodiment, each pressure supply channel 102 has a working section 103, each working end is provided with a plug 202 and an elastic component 201, and the diameter of each working section 103 increases gradually or in a step-like manner from the liquid inlet end of each working section 103 to the liquid outlet end of each working section 103. Specifically, the working section 103 may be conical to achieve the gradual increase in the diameter of the working section 103; the working section 103 includes a plurality of sub-channels connected in sequence, and the diameters of the plurality of sub-channels increase in sequence from the liquid inlet end of each working section 103 to the liquid outlet end of each working section 103, thereby achieving the step-like increase in the diameter of the working section 103; specifically, the processing method of the stepped working section 103 is: drilling directly on the pressure supply body 1 with drill bits of different apertures, first drilling with a coarse drill bit, and then gradually drilling with a finer drill bit until the drill holes are connected. When the plug 202 moves away from the liquid inlet end of the corresponding pressure supply channel 102, the distance between the plug 202 and the inner side wall of the pressure supply channel 102 at the location gradually increases, thereby increasing the flow rate entering the bearing pressure supply port 301. Conversely, when the plug 202 moves closer to the liquid inlet end of the corresponding pressure supply channel 102, the distance between the plug 202 and the inner side wall of the pressure supply channel 102 at the location gradually decreases, thereby reducing the flow rate entering the bearing pressure supply port 301.
[0037] In this embodiment, each plug 202 is spherical, and the cross section of each pressure supply channel 102 is circular. It should be noted that the diameter of the plug 202 should not be too similar to the diameter of the liquid inlet end of the working section 103, so as to prevent the plug 202 from extending too much outside the liquid inlet of the working section 103 and getting stuck. The diameter of the plug 202 and the diameter of the liquid inlet end of the working section 103 can be determined by experimental verification and other methods.
[0038] In this embodiment, under the buoyancy of the lubricating medium, the center of each plug 202 can be maintained on the axis of the corresponding pressure supply channel 102, ensuring that the plug 202 will not generate additional lift or gravity when the lubricating medium is introduced, ensuring that the plug 202 can move better under the action of the lubricating medium and the elastic component 201, thereby ensuring the self-balancing effect of the pressure supply.
[0039] As a preferred embodiment, the density of the plug 202 is the same or approximately the same as the density of the lubricating medium, or the plug 202 is a hollow structure, so as to ensure that the plug 202 can be suspended in the lubricating medium without generating additional lift or gravity.
[0040] In this embodiment, a plurality of connecting pipes 4 and a plurality of gaskets 5 are also included. The liquid inlet end of each connecting pipe 4 is threadedly connected and communicated with the liquid outlet end of a pressure supply body 1, and the liquid outlet end of each connecting pipe 4 is communicated with a bearing pressure supply port 301; an annular groove 401 is provided on the inner side wall of the liquid inlet end of each connecting pipe 4, and a gasket 5 is provided in each annular groove 401, and a through hole 501 is provided on each gasket 5; the two ends of each gasket 5 are respectively abutted with the inner bottom wall of an annular groove 401 and the end of the corresponding elastic component 201 away from the corresponding plug 202. After the connecting pipe 4 is threadedly connected with the pressure supply body 1, the gasket 5 can abut with the elastic component 201 to provide support for the end of the elastic component 201 away from the plug 202. In this embodiment, the connecting pipe 4 and the pressure supply body 1 are threadedly connected, and the connection method is relatively simple, and the connection between the gasket 5 and the elastic component 201 and the pressure supply body 1 does not require additional connectors for connection, and the structure is simple, which is convenient for disassembly and maintenance. Specifically, the installation method is as follows: first place the plug 202 in the pressure supply channel 102, put the elastic component 201 in, then place the gasket 5 in the annular groove 401, and finally thread the connecting pipe 4 and the pressure supply body 1 together.
[0041] As a preferred embodiment, the liquid inlet end of the connecting pipeline 4 is provided with an external thread, and the liquid outlet end of the pressure supply channel 102 of the pressure supply body 1 is provided with an internal thread. After the connecting pipeline 4 is threadedly connected to the pressure supply body 1, the end of the gasket 5 close to the elastic component 201 can contact the end surface of the liquid outlet end of the pressure supply channel 102 of the pressure supply body 1 away from the elastic component 201, that is, the connecting pipeline 4 and the pressure supply channel 102 can press the gasket 5 tightly, thereby ensuring the stability of the installation of the gasket 5.
[0042] In this embodiment, the pressure supply body 1 includes at least two pressure supply units 104, each of which has a total pressure supply port 101 and two pressure supply channels 102. The bearing pressure supply ports 301 of the sliding bearing 3 are generally an even number, such as four, six, eight, etc. The pressure supply body 1 is configured in the form of a single pressure supply unit 104, and the number of pressure supply units 104 can be determined according to the number of bearing pressure supply ports 301, thereby improving the convenience of application. It should be noted that the flow rate, pressure, etc. of the lubricating medium entering the total pressure supply port 101 of each pressure supply unit 104 connected to the same sliding bearing 3 should be guaranteed to be equal.
[0043] As a preferred embodiment, there are two pressure supply units 104 , and the two pressure supply channels 102 of the pressure supply unit 104 are connected to two bearing pressure supply ports 301 (two bearing pressure supply ports 301 on the same diameter) arranged opposite to the sliding bearing 3 .
[0044] In this embodiment, the number of pressure supply channels 102 of the pressure supply body 1 is the same as the number of bearing pressure supply ports 301 of the sliding bearing 3, the number of self-balancing devices 2, pressure supply channels 102, gaskets 5 and connecting pipes are the same, and the axes of all pressure supply channels 102 are parallel or collinear with each other. When the pressure supply body 1 is in use, it can ensure that each pressure supply channel 102 is horizontally arranged to ensure the self-balancing effect.
[0045] In this embodiment, the elastic component 201 is a light spring.
[0046] Example 2
[0047] like Figures 4 to 6 As shown, this embodiment provides a pump 200 equipped with a pressure supply device, including a pump shaft 6, a sliding bearing 3 and a pressure supply device 100 suitable for sliding bearings in embodiment 1, wherein the pump shaft 6 is sleeved in the sliding bearing 3, and multiple bearing pressure supply ports 301 of the sliding bearing 3 are all connected to a pressure supply channel 102 of the pressure supply body 1. This embodiment can prevent the occurrence of pressure reflux and the like, ensure the pressurization effect of the sliding bearing 3, ensure the lubrication effect of the bearing bush 302 and the journal of the pump shaft 6, reduce the friction and wear between the bearing bush 302 and the journal, and improve the stability of the sliding bearing 3.
[0048] In this embodiment, a pump housing 7 and a plurality of flow guides 8 are also included. The sliding bearing 3 is arranged in the pump housing 7. The pump housing 7 is provided with a plurality of pump pressure supply ports 701. Each flow guide 8 is provided with a flow guide channel. The pump pressure supply ports 701 correspond to the bearing pressure supply ports 301 one by one. A flow guide 8 is provided between each pump pressure supply port 701 and the corresponding bearing pressure supply port 301. Each pump pressure supply port 701 is connected to the liquid outlet of a pressure supply channel 102. The two ends of each flow guide channel are respectively connected to the corresponding pump pressure supply port 701 and the corresponding bearing pressure supply port 301. The lubricating medium of the pressure supply channel 102 passes through the pump pressure supply port 701, the flow guide channel and the bearing pressure supply port 301 in sequence to enter the bearing bush 302 and the journal for lubrication.
[0049] As a preferred embodiment, it also includes an annular support member 9, in which a sliding bearing 3 is sleeved and fixedly connected, and a plurality of flow guide members 8 are arranged between the annular support member 9 and the pump housing 7; the annular support member 9 is provided with a plurality of radial through holes 501, and the inner and outer ends of the radial through holes 501 are respectively connected to a bearing pressure supply port 301 and a flow guide channel.
[0050] As a preferred embodiment, after the pump housing 7, the guide member 8, the annular support member 9 and the sliding bearing 3 are assembled, the assembly is punched and the pump pressure supply port 701, the guide channel, the radial through hole 501 and the bearing pressure supply port 301 are processed at the same time to prevent the pump pressure supply port 701, the guide channel, the radial through hole 501 and the bearing pressure supply port 301 from being misaligned during the installation process.
[0051] As a preferred embodiment, four square or rectangular pressure supply grooves 303 are provided on the inner side wall of the bearing shell 302 of the sliding bearing 3, and the pressure supply grooves 303 are connected to the corresponding bearing pressure supply port 301. The wrap angle α of the pressure supply groove 303 (the central angle corresponding to the two side edges parallel to the axis of the bearing shell 302) is 30° to 70°, preferably 45°, and the wrap angle α of the four pressure supply grooves 303 is the same. The depth b of the pressure supply groove 303 is 2mm to 6mm, preferably 4mm, and the depth of the four pressure supply grooves 303 is the same. The axial width of the pressure supply groove 303 is 30%-70% of the axial width of the bearing shell 302. The edges of all pressure supply grooves 303 are chamfered, the chamfer angle is 45°, and the depth of the chamfer is equal to the depth b of the pressure supply groove 303.
[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A pressure supply device suitable for a sliding bearing, characterized in that: It includes a pressure supply body and a plurality of self-balancing devices, wherein: The pressure supply body has at least one total pressure supply port and a plurality of pressure supply channels, the liquid inlet of each pressure supply channel is connected with one total pressure supply port, the liquid outlet of each pressure supply channel is used to communicate with the bearing pressure supply port of the sliding bearing, and the total pressure supply port is used to supply lubricating medium into the pressure supply body; Each of the self-balancing devices includes an elastic component and a plug. Each of the pressure supply channels is provided with a self-balancing device. One end of the elastic component of each of the self-balancing devices is connected to or abutted against the self-balancing device, and the plug of each of the self-balancing devices is connected to or abutted against the other end of the elastic component of each of the self-balancing devices. Each of the plugs is provided at the liquid inlet end of the corresponding pressure supply channel. The plug of each of the self-balancing devices can close the liquid inlet of the corresponding pressure supply channel under the elastic force of the elastic component of each of the self-balancing devices. Each of the plugs can move toward a side close to the corresponding elastic component and open the liquid inlet of the corresponding pressure supply channel under the action of the lubricating medium entering through the liquid inlet of the corresponding pressure supply channel.
2. The pressure supply device for sliding bearings according to claim 1, characterized in that: The size of the liquid inlet end of each pressure supply channel is smaller than the size of the liquid outlet end of each pressure supply channel, and each plug can increase the flow rate of the lubricating medium entering the corresponding pressure supply channel by moving along the corresponding pressure supply channel away from the liquid inlet end of the corresponding pressure supply channel.
3. The pressure supply device for sliding bearings according to claim 2, characterized in that: Each of the pressure supply channels has a working section, each of which has a plug and an elastic component disposed therein, and the diameter of each of the working sections increases gradually or in a stepped manner from the liquid inlet end to the liquid outlet end of each of the working sections.
4. The pressure supply device for sliding bearings according to claim 1, characterized in that: Each of the plugs is spherical, and the cross section of each of the pressure supply channels is circular.
5. The pressure supply device for sliding bearings according to claim 4, characterized in that: Under the buoyancy of the lubricating medium, the spherical center of each plug can be maintained on the axis of the corresponding pressure supply channel.
6. The pressure supply device for sliding bearings according to claim 1, characterized in that: It also includes multiple connecting pipelines and multiple gaskets, the liquid inlet end of each connecting pipeline is threadedly connected and communicated with the liquid outlet end of a pressure supply channel of the pressure supply body, and the liquid outlet end of each connecting pipeline is communicated with a bearing pressure supply port; an annular groove is provided on the inner side wall of the liquid inlet end of each connecting pipeline, a gasket is arranged in each annular groove, and a through hole is provided on each gasket; the two ends of each gasket are respectively abutted against the inner bottom wall of an annular groove and the end of the corresponding elastic component away from the corresponding plug.
7. The pressure supply device for sliding bearings according to claim 1, characterized in that: The pressure supply body comprises at least two pressure supply units, and each of the pressure supply units has one total pressure supply port and two pressure supply channels.
8. The pressure supply device for sliding bearings according to claim 6, characterized in that: The number of the pressure supply channels of the pressure supply body is the same as the number of the bearing pressure supply ports of the sliding bearing, the number of the self-balancing devices, the pressure supply channels, the gaskets and the connecting pipes are the same, and the axes of all the pressure supply channels are parallel or collinear with each other.
9. A pump equipped with a pressure supply device, characterized in that: It comprises a pump shaft, the sliding bearing and a pressure supply device suitable for the sliding bearing as described in any one of claims 1 to 8, wherein the pump shaft is sleeved in the sliding bearing, and the multiple bearing pressure supply ports of the sliding bearing are all connected to one of the pressure supply channels of the pressure supply body.
10. The pump equipped with a pressure supply device according to claim 9, characterized in that: It also includes a pump housing and a plurality of guide members, the sliding bearing is arranged in the pump housing, a plurality of pump pressure supply ports are arranged on the pump housing, each of the guide members is provided with a guide channel, the pump pressure supply port and the bearing pressure supply port correspond to each other one by one, a guide member is arranged between each pump pressure supply port and the corresponding bearing pressure supply port, each pump pressure supply port is connected with a liquid outlet of a pressure supply channel, and both ends of each guide channel are respectively connected with the corresponding pump pressure supply port and the corresponding bearing pressure supply port.