CN116792400A - Thrust bearing supporting structure for pumping and storage unit - Google Patents

Abstract

The invention provides a thrust bearing supporting structure for a pumping and accumulating unit, which comprises a thrust bearing support, wherein a thrust shoe is arranged above the thrust bearing support, a thrust bearing seat is arranged below the thrust bearing support, and a thrust bearing supporting limit seat is surrounded on the side edge of the thrust bearing support. The thrust bearing support is driven by the rotary thrust bearing seat to change the circumferential position to realize eccentric support during the shutdown period when the rotation direction of the unit needs to be converted. Therefore, the circumferential eccentric support similar to the thrust bearing of the unidirectional rotating unit is realized, and the reliability of the thrust bearing of the pumping and accumulating unit is improved.

Description

Thrust bearing supporting structure for pumping and storage unit

Technical Field

The invention relates to the technical field of fluid machinery and energy engineering equipment, in particular to an eccentric thrust bearing supporting structure of a pumped storage unit.

Background

Along with the continuous increase of the capacity of the power grid system in China and the powerful construction of thermal power plants and nuclear power plants, hydropower stations and pumped storage power stations capable of conveniently adjusting the power load of the power grid are also powerful constructed in recent decades, and particularly the further acceleration construction of the pumped storage power stations is realized, and the number of the pumped storage power stations can be increased in an explosive manner. It is well known that: the conventional hydroelectric station mainly comprises a generating unit consisting of a hydroelectric generating set for unidirectional hydroelectric generation, and the pumped storage power station comprises a set unit consisting of a water pump turbine and a generating motor. The conventional hydro-generator unit is a unidirectional rotating unit, the thrust bearing of the unit can be designed according to optimal circumferential support eccentricity as required, and the eccentric thrust bearing has the advantages of large bearing capacity, large oil film thickness, low watt temperature, high operation reliability, easy establishment of a thrust bearing oil film during low-speed operation and the like, and the circumferential eccentric thrust bearing technology is very mature at present and is widely applied to giant, large, medium and small hydro-generator units; the pumping and accumulating unit is a bidirectional rotating unit, the thrust bearing is supported by a central support in the circumferential direction for adapting to the bidirectional rotating requirement of the unit, the circumferential central support mode has the defects of low bearing capacity, small oil film thickness, high bearing capacity, poor operation reliability and the like, meanwhile, the oil film of the thrust bearing is difficult to establish in the start-stop stage, the oil film needs to be established in an auxiliary way by means of a high-pressure oil jacking device to avoid bearing burning, and although the technology of the pumping and accumulating unit is developed in a long-term way, the technical problem of the thrust bearing of the pumping and accumulating unit still occurs.

The chinese patent publication No. CN114483767a discloses a heavy duty water lubricated thrust bearing comprising: a stationary support ring and a rotary thrust disc; the static support ring is connected with the fixed base and comprises a plurality of bearing shoes, a plurality of bearing shoe seats, a bearing shoe seat mounting ring, an elastic pad and a bearing mounting ring, wherein the bearing shoes are fixed in grooves of the bearing shoe seats, and the bearing shoes and the bearing shoe seats form a composite body; the bearing shoe seats are circumferentially and uniformly distributed on a bearing shoe seat mounting ring, the annular surface formed by the upper surfaces of a plurality of bearing shoes on the bearing shoe seats is a working surface of a static supporting ring, an elastic pad and a bearing mounting ring are sequentially arranged at the bottom of the bearing shoe seat mounting ring, and the bearing mounting ring is connected with a fixed base to form a non-rotating part of a bearing; the rotary thrust disc is a rotary part of a bearing and is connected with a rotary machine; the rotary thrust disc and the static support ring are concentric and are arranged opposite to each other, and the working surface of the rotary thrust disc is contacted with the surface of the bearing bush to form a bearing friction surface. The thrust bearing of the patent is a fixed thrust bearing, is different from the operation mechanism of the tilting pad thrust bearing commonly adopted by a conventional hydraulic generator set and a pumping and storing station set, has a non-tilting thrust pad structure, does not have circumferential eccentricity, and has the problem of low bearing capacity.

Disclosure of Invention

The invention provides a thrust bearing supporting structure for a pumping and accumulating unit, which solves the problems of low bearing capacity, no circumferential eccentricity of a thrust tile, non-tilting of the thrust tile, small thickness of friction lubrication medium, high tile temperature, poor operation reliability and the like in the background art. In order to solve the technical problems, the technical scheme adopted by the invention is that the thrust bearing supporting structure for the pumping and accumulating unit comprises a thrust bearing support, a thrust shoe is arranged above the thrust bearing support, a thrust bearing seat is arranged below the thrust bearing support, and a thrust bearing supporting limit seat is arranged on the side edge of the thrust bearing support.

The thrust tile is fixed on a frame center body of the thrust bearing through a limiting pin, and the position of the thrust tile relative to the frame center body is basically unchanged (only changes in the gap range between a limiting pin hole and the limiting pin on the thrust tile) when the unit rotates forwards and reversely; before the machine set needs to be switched to a forward rotation working condition, when the machine set is stopped, the thrust bearing seat is driven by the hydraulic oil cylinder to rotate forward to a set position, and the rotation of the thrust bearing seat drives the thrust bearing support to change the circumferential position under the action of the thrust bearing support limit seat, so that the thrust bearing support generates a forward eccentricity relative to the thrust bearing shoe to realize the required eccentricity when the thrust bearing rotates forward; before the machine set is switched to a reverse rotation working condition, when the machine set is stopped, the thrust bearing seat reversely rotates to a set position under the reverse pulling of the hydraulic oil cylinder, and the rotation of the thrust bearing seat drives the thrust bearing support to change the circumferential position under the action of the thrust bearing support limit seat, so that the thrust bearing support generates a reverse eccentricity relative to the thrust bearing shoe to realize the required eccentricity when the thrust bearing reversely rotates.

Preferably, the thrust bearing support includes an upper elastic disc contacting the bottom surface of the thrust shoe and a lower elastic disc contacting the top surface of the thrust bearing seat, the upper and lower elastic discs being paired upper and lower elastic discs. The contact of the upper elastic disc and the lower elastic disc is spherical contact. The upper elastic disc and the lower elastic disc are directly placed in the thrust bearing supporting limit seat, a fit clearance is formed between the outer diameter of the elastic disc and the inner diameter of the thrust bearing limit seat, the elastic disc and the thrust shoe can conveniently tilt and deflect as required, and the elastic disc is changed along with the change of the circumferential position of the thrust bearing seat. The upper and lower paired elastic disks are large in stress area contacted with the bottom surface of the thrust tile and the top surface of the thrust bearing seat, and can provide enough strong supporting capacity, so that the elastic material is not easy to damage and durable.

Preferably, a boss is arranged at the bottom surface part of the contact between the thrust tile and the upper elastic disc, an inner diameter side circumferential limit notch is arranged at the inner diameter side of the thrust tile, and the inner diameter side circumferential limit notch is in pin joint with the inner diameter limit pin seat through a limit pin; an outer diameter side limiting notch is arranged on the outer diameter side of the thrust tile, and the outer diameter side limiting notch is in pin joint with the outer diameter limiting pin seat through a limiting pin; the internal diameter limiting pin seat and the external diameter limiting pin seat are in one-to-one correspondence, the thrust tile is placed on the upper elastic disc, the boss part is in direct contact with the upper elastic disc surface, the boss and the limiting notches on two sides ensure that the thrust tile has higher strength, the shape of the limiting notch enables the installation of the limiting pin and the installation and replacement of the thrust tile to be more convenient, the operation of workers is convenient, the internal diameter side bottom of the thrust tile is provided with an internal diameter side circumferential limiting notch, and the external diameter side bottom of the thrust tile is provided with an external diameter side limiting notch. When the thrust tile is installed, the inner diameter side circumferential spacing notch on the inner diameter side is aligned and fixed on the spacing pin seat of the inner diameter side, the spacing pin is positioned on the inner diameter side, the spacing pin with the axial spacing end on the outer diameter side is installed in the spacing notch on the outer diameter side of the thrust tile after the thrust tile is positioned, the spacing pin on the inner diameter side and the spacing pin on the outer diameter side are both installed and fixed on the spacing pin seat, the spacing pin on the inner diameter side is installed and fixed on the inner diameter spacing pin seat, the spacing pin on the outer diameter side is installed and fixed on the outer diameter spacing pin seat, and the spacing pin seat are used for enabling the position of the thrust tile not to change the circumferential position along with the working condition conversion.

Preferably, the inner diameter limiting pin seat is arranged on the center body of the frame through an inner diameter side limiting pin seat fixing support; the outer diameter limiting pin seat is arranged on the center body of the frame through an outer diameter side limiting pin seat fixing support; the inner diameter side limiting pin seat fixing supports are circumferentially distributed along the inner diameter of the center body of the frame; the outer diameter side limiting pin seat fixing supports are circumferentially distributed along the outer diameter of the center body of the frame; the limiting pin seat fixing support comprises an inner diameter side limiting pin seat fixing support and an outer diameter side limiting pin seat fixing support, wherein the inner diameter side limiting pin seat fixing support corresponds to the outer diameter side limiting pin seat fixing support one by one, the limiting pin and the limiting pin seat are respectively fixed in the limiting pin seat fixing support on the machine frame center body, the limiting pin seat fixing support comprises an inner diameter side limiting pin seat fixing support circumferentially distributed along the inner diameter of the machine frame center body and an outer diameter side limiting pin seat fixing support circumferentially distributed along the outer diameter of the machine frame center body, and the inner diameter side limiting pin seat fixing support corresponds to the outer diameter side limiting pin seat fixing support one by one. The position of the limiting pin is limited by the fixed support of the limiting pin seat on the inner and outer diameter sides of the center body of the frame, so that the effect of limiting the position of the thrust tile is achieved, the circumferential position of the thrust tile is not changed along with working condition conversion, and the position of the thrust tile is not changed.

Preferably, a thrust mirror plate is arranged above the thrust tile, the thrust mirror plate is fixed on the lower surface of the thrust head through a thrust mirror plate spigot, a mirror plate fixing bolt is arranged at the joint of the thrust mirror plate and the thrust head end, and the thrust mirror plate, the thrust head, the rotor and the generator large shaft rotate together. The mirror plate fixing bolt is used for reinforcing connection between the thrust mirror plate and the thrust collar.

Preferably, the thrust bearing seat is an annular integral part, the thrust bearing seat is arranged in the thrust bearing seat limiting groove through the radial limiting spigot at the bottom, the thrust bearing seat limiting groove is positioned on the machine frame center body and is positioned between the inner diameter side limiting pin seat fixing support and the outer diameter side limiting pin seat fixing support in one-to-one correspondence, the thrust bearing seat is nested on the machine frame center body as a whole, the support reserved through the machine frame center body is used for installing the thrust bearing seat, the installation of the thrust bearing seat is simpler and more convenient, the manpower and the position adjusting time are saved, the thrust bearing seat limiting groove corresponds to the machine frame center body, the connection stability of the integral structure is guaranteed, and the matching relationship is strong. The thrust bearing seat is of an integral ring structure, accurate synchronous change of all thrust bearing supporting positions can be conveniently realized through change of the circumferential positions of the thrust bearing seat, and consistency of all thrust tiles and thrust bearing supporting eccentric amounts is ensured.

Preferably, the thrust bearing supporting and limiting seat is fixed on the thrust bearing seat through a limiting groove, a plurality of fixing screw holes are formed in the circumferential direction of the side face of the limiting groove, the thrust bearing supporting and limiting seat is fixed on the thrust bearing seat through the limiting groove, and a plurality of fixing screw holes of the thrust bearing supporting and limiting seat are formed in the circumferential direction of the upper surface of the thrust bearing seat. And a thrust shoe is arranged on each thrust bearing supporting and limiting seat, the bottom surface of the thrust shoe is not contacted with the top surface of the thrust bearing supporting and limiting seat, and the bottom surface of the thrust shoe is only contacted with the upper elastic disc supporting surface, so that when the working condition is changed (the rotating speed direction is changed), the thrust bearing supporting and limiting seat is simultaneously changed with the thrust bearing seat under the action of the thrust bearing seat. The fixed screw hole is used for assisting in fixing the thrust bearing supporting and limiting seat, and the thrust bearing supporting and limiting seat is fixed in the limiting groove and then is fixed on the thrust bearing seat through the screw hole by using a bolt.

Preferably, the thrust bearing seat is hinged with the end part of a piston rod of a hydraulic cylinder, the bottom of a cylinder body of the hydraulic cylinder is hinged on a hydraulic cylinder fixing hinged support, the hydraulic cylinder fixing hinged support is uniformly distributed on a frame center body, the end part of the piston rod of the hydraulic cylinder is hinged and fixed on the thrust bearing seat through a pin bolt, the bottom of the cylinder body of the hydraulic cylinder is hinged and fixed on a fixing support of the frame center body through a pin bolt, the thrust bearing seat is converted according to working conditions of a unit, the thrust bearing seat is respectively positioned at two different circumferential positions under the pushing and pulling of the hydraulic cylinder, the thrust bearing seat is pushed to rotate positively by the hydraulic cylinders uniformly distributed in the circumferential direction before the unit rotates positively, and the rotation of the thrust bearing seat drives the circumferential position of a thrust bearing support to change under the action of a thrust bearing support limit seat, so that the thrust bearing support generates a forward eccentricity relative to a thrust bearing to realize the required eccentricity when the thrust bearing rotates positively;

before the unit reversely rotates, the thrust bearing seat is pulled to reversely rotate through the hydraulic cylinders uniformly distributed in the circumferential direction, and the rotation of the thrust bearing seat drives the circumferential position of the thrust bearing support to change under the action of the thrust bearing support limit seat, so that the thrust bearing support generates a reverse eccentric relative to the thrust bearing, and the required eccentric of the thrust bearing during the reverse rotation is realized. The maximum stroke of the hydraulic cylinder is designed according to the position of the thrust bearing support when the unit rotates in the forward direction, and the minimum stroke (zero stroke) of the hydraulic cylinder is designed according to the position of the thrust bearing support when the unit rotates in the reverse direction. The maximum stroke of the hydraulic cylinder is the maximum stroke for charging oil in the forward direction (bottom) of the cylinder, the piston of the cylinder pushes outwards, and the minimum stroke (zero stroke) of the cylinder is the minimum stroke for charging oil in the reverse direction (top) of the cylinder, and the piston retracts to contact with the bottom of the cylinder.

The invention has the advantages that the thrust bearing support structure is stable and can support larger force, the position of the thrust tile is kept unchanged no matter the unit rotates positively or reversely under the action of the circumferential limiting pin, and the thrust bearing support is driven by the rotating thrust bearing seat to change the circumferential position to realize eccentric support during the shutdown of the unit, the rotating direction of which needs to be converted. Therefore, the circumferential eccentric support similar to the thrust bearing of the unidirectional rotating unit is realized, and the reliability of the thrust bearing of the pumping and accumulating unit is improved. Meanwhile, the structure of the invention is matched with each other, so that the invention has the advantages of better strength, stable work, simple installation mode, reasonable installation, manpower saving and effective improvement of production benefits.

Drawings

FIG. 1 is a schematic cross-sectional connection of a thrust bearing support assembly of the present invention.

FIG. 2 is a schematic top view of a generator operating mode of the thrust bearing support assembly of the present invention.

FIG. 3 is a schematic top view of a motor operating mode of the thrust bearing support assembly of the present invention.

Fig. 4 is a schematic top view of the thrust bearing housing of the present invention.

Fig. 5 is an enlarged partial view of the limiting groove of the present invention.

FIG. 6 is a schematic cross-sectional view of a thrust bearing housing of the present invention.

Fig. 7 is an enlarged schematic view of a portion of a thrust runner and thrust collar of the present invention.

FIG. 8 is a schematic diagram of the integral connection of the thrust runner and thrust collar of the present invention.

Fig. 9 is a schematic top view of a center body of a frame according to the present invention.

FIG. 10 is a schematic view of the thrust tile of the present invention.

FIG. 11 is a schematic top view of a thrust shoe of the present invention.

FIG. 12 is a schematic view of a thrust bearing support structure of the present invention.

In the figure: 1. the thrust bearing support, 1-1, an upper elastic disc, 1-2, a lower elastic disc, 2, a thrust tile, 2-1, a boss, 2-2, an inner diameter side radial limit notch, 2-3, an outer diameter side limit notch, 3, a thrust bearing seat, 4, a thrust bearing support limit seat, 5, a limit pin, 6-1, an inner diameter limit pin seat, 6-2, an outer diameter limit pin seat, 7, a frame center body, 8, a thrust mirror plate, 9, a thrust head, 10, a thrust mirror plate spigot, 11, a mirror plate fixing bolt, 12, a radial limit spigot, 13, a limit groove, 14, a fixing screw hole, 15, a hydraulic cylinder, 15-1, a piston rod, 16, a hydraulic cylinder fixing hinge support, 17, a limit pin seat fixing support, 17-1, an inner diameter side limit pin seat fixing support, 17-2, an outer diameter side limit pin seat fixing support, 18, a thrust bearing seat limit groove, L1, a forward eccentric amount and a reverse eccentric amount.

Detailed Description

The following describes a specific embodiment of the technical scheme of the present invention by way of examples and with reference to the accompanying drawings.

Example 1

In the embodiment 1 shown in fig. 1 to 12, a thrust bearing support structure for a pumping and accumulating unit includes a thrust bearing support 1, wherein the thrust bearing support 1 is an elastic disc in the embodiment, a thrust tile 2 is arranged above the thrust bearing support 1, a thrust bearing seat 3 is arranged below the thrust bearing support 1, and a thrust bearing support limit seat 4 is enclosed on the side edge of the thrust bearing support 1. The thrust bearing support 1 comprises an upper elastic disc 1-1 contacted with the bottom surface of the thrust tile 2 and a lower elastic disc 1-2 contacted with the top surface of the thrust bearing seat 3, wherein the upper elastic disc 1-1 and the lower elastic disc 1-2 are elastic discs used in pairs up and down, and a fit clearance is formed between the outer diameter of the thrust bearing support 1 and the inner diameter of the thrust bearing limit seat 4, so that the upper elastic disc 1-1 can deflect flexibly. The thrust bearing supporting limit seat 4 is fixed on the thrust bearing seat 3 through a limit groove 13, and a plurality of fixing screw holes 14 are formed in the circumferential direction of the upper surface of the thrust bearing seat 3. The thrust bearing seat 3 is hinged with the end part of a piston rod 15-1 of a hydraulic cylinder 15, the bottom of the cylinder body of the hydraulic cylinder 15 is hinged on a hydraulic cylinder fixing hinged support 16, and the hydraulic cylinder fixing hinged support 16 is uniformly distributed on the frame center body 7. The bottom surface part that thrust tile 2 and last elastic disk 1-1 contacted is equipped with boss 2-1, and thrust tile 2 internal diameter side is equipped with radial spacing breach 2-2 of internal diameter side, and thrust tile 2 external diameter side is equipped with external diameter side limit breach 2-3, and radial spacing breach 2-2 of internal diameter side and external diameter side limit breach 2-3 pass through spacer pin 5 and spacing pin seat 6 pin joint, and spacing pin seat 6 passes through spacing pin seat fixed bolster 17 setting on frame center body 7. Wherein the inner diameter side circumferential limit notch 2-2 is in pin joint with the inner diameter limit pin seat 6-1 through the limit pin 5; the outer diameter side limiting notch 2-3 is in pin joint with the outer diameter limiting pin seat 6-2 through the limiting pin 5; the inner diameter limiting pin seat 6-1 is arranged on the frame center body 7 through an inner diameter side limiting pin seat fixing support 17-1; the outer diameter limiting pin seat 6-2 is arranged on the frame center body 7 through an outer diameter side limiting pin seat fixing support 17-2; the inner diameter side limiting pin seat fixed support 17-1 is circumferentially distributed along the inner diameter of the frame center body 7; the outer diameter side limiting pin seat fixing supports 17-2 are circumferentially distributed along the outer diameter of the frame center body 7; the inner diameter side limiting pin seat fixing support 17-1 and the outer diameter side limiting pin seat fixing support 17-2 are in one-to-one correspondence. The thrust bearing seat 3 is an annular integral part, the thrust bearing seat 3 is arranged in a thrust bearing seat limiting groove 18 through a radial limiting spigot 12, and the thrust bearing seat limiting groove 18 is positioned on the frame center body 7 and is positioned between an inner diameter side limiting pin seat fixing support 17-1 and an outer diameter side limiting pin seat fixing support 17-2 which are in one-to-one correspondence. The limiting pin seat fixing support 17 comprises an inner diameter side limiting pin seat fixing support 17-1 circumferentially distributed along the inner diameter of the frame center body 7 and an outer diameter side limiting pin seat fixing support 17-2 circumferentially distributed along the outer diameter of the frame center body 7, wherein the inner diameter side limiting pin seat fixing support 17-1 and the outer diameter side limiting pin seat fixing support 17-2 are in one-to-one correspondence. A thrust mirror plate 8 is arranged above the thrust tile 2, the thrust mirror plate 8 is fixed on the lower surface of the thrust head 9 through a thrust mirror plate spigot 10, and a mirror plate fixing bolt 11 is arranged at the joint of the thrust mirror plate 8 and the end part of the thrust head 9. One end of the hydraulic cylinder 15 is hinged and fixed on a hydraulic cylinder fixing hinged support 16 of the frame center body 7, and the other end of the piston rod 15-1 is hinged and fixed on the thrust bearing seat 3. The thrust bearing seat 3 is in an annular integral structure and is limited by a radial limiting spigot 12 to be directly placed on the frame center body 7; the thrust bearing supporting and limiting seat 4 is fixed on the thrust bearing seat 3 through a limiting groove 13 by bolts, and the upper and lower paired elastic discs are directly placed in the thrust bearing supporting and limiting seat 4 and are changed along with the circumferential position of the thrust bearing seat 3 according to the working condition conversion of the unit; the thrust tile 2 is placed on the upper elastic disc 1-1 and is in direct contact with the surface of the upper elastic disc 1-1, the thrust tile 2 is limited and is respectively fixed on a limiting pin seat fixing support 17 of the frame center body 7 through an inner diameter side limiting pin 5-1, an outer diameter side limiting pin 5-2 and a limiting pin seat 6, and the position of the thrust tile 2 does not change the circumferential position along with the working condition conversion; the thrust runner 2 is provided with a thrust mirror plate 8, the thrust mirror plate 8 is fixed on the lower surface of the thrust head 9 through a thrust mirror plate spigot 10 and a bolt 11, and the thrust mirror plate 8 rotates together with the thrust head 9, the rotor and the generator large shaft; the end part of a piston rod 15-1 of the hydraulic cylinder 15 is hinged and fixed on the thrust bearing seat 3 through a pin bolt, the bottom of the cylinder body of the hydraulic cylinder 15 is hinged and fixed in a hydraulic cylinder fixing hinged support 16 on the frame center body 7 through a pin bolt, the thrust bearing seat 3 is converted according to the working condition of a machine set, and the thrust bearing seat is respectively positioned at two different circumferential positions under the pushing of the hydraulic cylinder 15.

One is that the maximum stroke of the hydraulic cylinder 15 is the maximum stroke for charging the oil cylinder in the forward direction (bottom), the hydraulic cylinder piston rod 15-1 is pushed outwards, and the other is that the minimum stroke of the hydraulic cylinder 15 (zero stroke) is that the oil cylinder is charged in the reverse direction (top), and the hydraulic cylinder piston rod 15-1 is retracted to the minimum stroke for contacting the bottom of the hydraulic cylinder 15. The thrust bearing support limiting seat 4 is provided with a thrust tile 2, the bottom surface of the thrust tile 2 is not contacted with the top surface of the thrust bearing support limiting seat 4, and the bottom surface of the thrust tile 2 is only contacted with the supporting surface of the upper elastic disc 1-1, so that when the working condition is convenient to switch (change of the rotating direction of a machine set), the thrust bearing support 1 and the thrust bearing support limiting seat 4 are simultaneously changed together with the thrust bearing seat 3 under the action of the thrust bearing seat 3.

Example 2

The thrust shoe 2 may also be referred to as a thrust bearing in this embodiment. When the unit with the rotating direction of the unit to be converted is stopped, the rotor of the generator can be properly jacked by a brake with high-pressure oil jacking function (the operation mode can be realized by only configuring a high-pressure oil jacking device of the brake according to each unit and simply modifying the control flow of the operation of the traditional high-pressure oil jacking device of the brake), so that the gravity of the rotating part of the unit acting on the thrust bearing is completely removed, and the friction resistance for pushing the thrust bearing seat 3 to rotate circumferentially is reduced; of course, high-pressure oil is put into the joint between the bottom of the thrust bearing seat 3 and the frame center body 7, so that frictional resistance for pushing the thrust bearing seat 3 to rotate in the circumferential direction can be reduced, and the thrust bearing seat 3 can be pushed to rotate in the circumferential direction without unloading the load of the thrust bearing.

Under the action of the inner diameter side limiting pin 5-1, the outer diameter side limiting pin 5-2 and the corresponding limiting pin seat 6, the position of the thrust tile 2 is kept unchanged no matter the unit rotates positively or reversely, and the thrust bearing support 1 drives the thrust bearing support 1 to change the circumferential position through rotating the thrust bearing seat 3 during the shutdown period when the rotation direction of the unit needs to be converted, so as to realize eccentric support. The limiting pin seat 6 is fixed on the frame center body 7 through an inner diameter side limiting pin seat fixing support 17-1 and an outer diameter side limiting pin seat fixing support 17-2, and the inner diameter side limiting pin seat fixing support 17-1 and the outer diameter side limiting pin seat fixing support 17-2 are circumferentially distributed on the frame center body 7 and belong to a one-to-one correspondence. In this embodiment, there are 12 outer diameter side limit pin seat fixing seats 17-2 and inner diameter side limit pin seat fixing seats 17-1 circumferentially distributed on the frame center body 7.

Before the unit is ready to rotate forward, namely the motor is ready to run according to the working condition of the generator, the forward rotation is clockwise, when the unit is stopped, the thrust bearing seat 3 is pushed to rotate forward by the hydraulic cylinders 15 which are uniformly distributed in the circumferential direction, in the embodiment, the number of the hydraulic cylinders is 3, and correspondingly, the hydraulic cylinders are provided with 3 hydraulic cylinder fixing hinged supports 16 which are uniformly distributed in the circumferential direction on the frame center body 7. The hydraulic cylinder fixing hinge support 16 is distributed on one side of the outer diameter side limiting pin seat fixing support 17-2 far away from the circle center of the frame center body 7.

The rotation of the thrust bearing seat 3 drives the circumferential position of the thrust bearing support 1 to change under the action of the thrust bearing support limit seat, so that the thrust bearing support 1 generates a forward eccentricity relative to the thrust shoe 2 to realize the required eccentricity when the thrust bearing rotates forward; before the machine set is ready to reversely rotate, namely the motor is ready to run according to the working condition of the motor, when the machine set is stopped, the thrust bearing seat 3 is pulled to reversely rotate through the 3 hydraulic cylinders 15 uniformly distributed in the circumferential direction, the rotation of the thrust bearing seat 3 drives the circumferential position of the thrust bearing support 1 to change under the action of the thrust bearing support limiting seat 4, and the thrust bearing support 1 generates a reverse eccentricity relative to the thrust bush 2 to realize the required eccentricity when the thrust bearing reversely rotates.

The thrust bearing seat 3 adopts an integral ring structure, and the accurate synchronous change of the positions of all thrust bearing supports 1 can be conveniently realized through the change of the circumferential positions of the thrust bearing seat 3, so that the consistency of the eccentric amounts of all thrust tiles 2 and the thrust bearing supports 1 is ensured. This eccentricity is represented by L1 in fig. 2, and L1 is the forward eccentricity.

Similarly, as shown in fig. 3, the motor is under the working condition, the unit rotates anticlockwise, the eccentric amount is L2 in the figure, and L2 is the reverse eccentric amount. The maximum stroke of the hydraulic cylinder 15 is designed manually according to the position of the thrust bearing support 1 when the unit rotates in the forward direction; the maximum stroke of the hydraulic cylinder 15 is the maximum stroke for charging the oil cylinder in the forward direction (bottom), the piston rod 15-1 of the hydraulic cylinder is pushed outwards, the minimum stroke (zero stroke) of the hydraulic cylinder 15 is the minimum stroke for charging the oil cylinder in the reverse direction (top), and the piston rod 15-1 of the hydraulic cylinder is retracted to be in contact with the bottom of the hydraulic cylinder 15. The limiting pin 5 does not change along with the change of the working condition, and the thrust bearing support 1, the thrust bearing support limiting seat 4 and the thrust bearing seat 3 change along with the change of the working condition. The working condition of the generator is that the generator set pushes the motor to generate electricity under the action of water power, and the generator set generally rotates clockwise: the thrust bearing support 1 is positioned on the right side of the center of the thrust tile 2, and is called positive eccentricity; the motor working condition refers to the working condition that the motor pumps water in a motor mode under the action of external power, and the unit generally rotates anticlockwise: the thrust bearing support 1 centered to the left of the center of the thrust shoe 2 is referred to as reverse eccentricity.

In addition to the above embodiments, the technical features or technical data of the present invention may be rearranged and combined within the scope of the claims and the description of the present invention to constitute new embodiments, which may be implemented without inventive effort by those skilled in the art, and thus, embodiments of the present invention not described in detail should be considered as embodiments of the present invention within the scope of the protection of the present invention.

Claims (8)

1. A thrust bearing support structure for a pumping and accumulating unit is characterized by comprising a thrust bearing support (1),

thrust bearing support (1) top is equipped with thrust tile (2), thrust bearing support (1) below is equipped with thrust bearing frame (3), thrust bearing support (1) side is enclosed and is had thrust bearing support spacing seat (4).

2. A thrust bearing support structure for an extraction and storage unit according to claim 1, characterized in that the thrust bearing support (1) comprises an upper elastic disc (1-1) in contact with the bottom surface of the thrust shoe (2) and a lower elastic disc (1-2) in contact with the top surface of the thrust bearing base (3), the upper elastic disc (1-1) and the lower elastic disc (1-2) being paired up and down.

3. A thrust bearing support structure for an extraction and storage unit according to claim 2, characterized in that,

a boss (2-1) is arranged at the bottom surface part of the thrust tile (2) contacted with the upper elastic disc (1-1),

an inner diameter side circumferential limit notch (2-2) is formed in the inner diameter side of the thrust tile (2), and the inner diameter side circumferential limit notch (2-2) is in pin joint with an inner diameter side limit pin seat (6-1) through a limit pin (5);

an outer diameter side limiting notch (2-3) is formed in the outer diameter side of the thrust tile (2), and the outer diameter side limiting notch (2-3) is in pin joint with an outer diameter side limiting pin seat (6-2) through a limiting pin (5);

the inner diameter side limiting pin seats (6-1) and the outer diameter side limiting pin seats (6-2) are in one-to-one correspondence.

4. A thrust bearing support structure for an extraction and storage unit according to claim 3, characterized in that,

the inner diameter side limiting pin seat (6-1) is arranged on the frame center body (7) through an inner diameter side limiting pin seat fixing support (17-1);

the outer diameter side limiting pin seat (6-2) is arranged on the frame center body (7) through an outer diameter side limiting pin seat fixing support (17-2);

the inner diameter side limiting pin seat fixing supports (17-1) are circumferentially distributed along the inner diameter of the frame center body (7);

the outer diameter side limiting pin seat fixing supports (17-2) are circumferentially distributed along the outer diameter of the frame center body (7);

the inner diameter side limit pin seat fixing support (17-1) corresponds to the outer diameter side limit pin seat fixing support (17-2) one by one.

5. A thrust bearing support structure for a pumping and accumulating unit according to claim 1 or 3, characterized in that a thrust mirror plate (8) is arranged above the thrust shoe (2), the thrust mirror plate (8) is fixed on the lower surface of the thrust head (9) through a thrust mirror plate spigot (10), and a mirror plate fixing bolt (11) is arranged at the joint of the end part of the thrust mirror plate (8) and the end part of the thrust head (9).

6. A thrust bearing support structure for a pumping and accumulating unit according to claim 1 or 4, characterized in that the thrust bearing seat (3) is an annular whole, the thrust bearing seat (3) is arranged in a thrust bearing seat limit groove (18) through a radial limit spigot (12), and the thrust bearing seat limit groove (18) is positioned on the frame center body (7) and is positioned between an inner diameter side limit pin seat fixing support (17-1) and an outer diameter side limit pin seat fixing support (17-2) in one-to-one correspondence.

7. The thrust bearing supporting structure for the pumping and accumulating unit according to claim 1, wherein the thrust bearing supporting limit seat (4) is fixed on the thrust bearing seat (3) through a limit groove (13), and a plurality of fixing screw holes (14) are formed in the circumferential direction of the side face of the limit groove (13).

8. A thrust bearing support structure for a pumping and accumulating unit according to claim 1 or 3, characterized in that the thrust bearing seat (3) is hinged with the end part of a piston rod (15-1) of a hydraulic cylinder (15), the bottom of the cylinder body of the hydraulic cylinder (15) is hinged on a hydraulic cylinder fixing hinged support (16), and the hydraulic cylinder fixing hinged support (16) is uniformly distributed on the frame center body (7).