Oil head of water turbine and water turbine

Abstract

The embodiment of the invention provides an oil head of a water turbine and the water turbine. The oil head of the embodiment of the invention comprises an oil head shell, an operation oil pipe, a bearing seat, an opening indicating rod and an insulating part. A mounting cavity and a monitoring groove are formed in the oil head shell, one end of the oil head body can extend into a front oil tank, the operation oil pipe movably penetrates into the mounting cavity in the axial direction of the oil head shell, and the operation oil pipe is sleeved with the bearing seat; one end of the opening indicating rod is connected with the bearing seat, the other end of the opening indicating rod is sleeved with the insulating part, and the insulating part can be matched with the groove wall of the monitoring groove in a relative movement mode along with movement of the opening indicating rod. Therefore, the oil head has the advantages that the service life is prolonged, and the use safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water turbines, and in particular to an oil receiver of a water turbine and a water turbine having the oil receiver. Background Art

[0002] The function of the oil receiver of the turbine is to introduce the oil from the speed governor into the rotating blade servo operating oil pipe to operate the runner servo piston to move and adjust the blade angle. The blade angle is usually indicated by the opening indicator rod. During use, it was found that the opening indicator scale had burn marks, and the bearing shaft surface caused cross erosion, the oil film was destroyed, the bearing bush heated up, and even caused the bush surface to burn, endangering the stable operation of the unit. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] During the operation of the hydropower plant unit, the inventor found that the oil receiver shell and the opening indicator rod had a reciprocating movement of the indicating mechanism due to the continuous change of the unit's operating conditions during the operation of the unit, and there was a discharge phenomenon between the oil receiver shell and the opening indicator rod. The existence of the discharge phenomenon caused the opening indicator scale to have burn marks. The inventor found that the cause of the discharge and the scale burn was the unreasonable design of the opening indicator rod. During the operation of the unit, the unit's operating conditions continued to change, causing the indicating mechanism to have a reciprocating movement. There was metal sliding friction between the indicating device and the oil receiver cover and the opening indicator rod scale. There was contact during the reciprocating process. After a long time, the opening indicator rod would be worn and accompanied by discharge, thereby causing shaft current. The metal friction process provided a circuit for the generator shaft current, and the shaft current was transmitted to the oil receiver cover, seriously threatening the safe and stable operation of the unit. The shaft current would cause cross erosion on the shaft surfaces of each bearing of the unit, destroy the oil film, heat the bearing bush, and even cause the bush surface to burn, endangering the stable operation of the unit.

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an oil receiver for a water turbine. The oil receiver has the advantages of increasing service life and safety in use.

[0006] An embodiment of the present invention further provides a water turbine.

[0007] The oil receiver of the water turbine according to the embodiment of the present invention comprises an oil receiver shell, an operating oil pipe, a bearing seat, an opening indicator rod and an insulating member.

[0008] The oil receiver shell is provided with an installation cavity and a monitoring groove, one end of the oil receiver body can extend into the front oil tank, the operating oil pipe is movably inserted into the installation cavity along the axial direction of the oil receiver shell, and the bearing seat is sleeved on the operating oil pipe; one end of the opening indicator rod is connected to the bearing seat, the insulating member is sleeved on the other end of the opening indicator rod, and the insulating member can be relatively movably matched with the groove wall of the monitoring groove as the opening indicator rod moves.

[0009] The oil receiver of the turbine of the embodiment of the present invention can avoid the metal sliding friction when the opening indicator rod is in direct contact with the oil receiver shell and moves relative to each other by providing an insulating member at one end of the opening indicator rod. The metal sliding friction can cause shaft current, which in turn causes the floating ring oil film to be destroyed and cause heating or burning. At the same time, the metal sliding friction will also increase the friction between the floating pad of the oil receiver and the operating oil pipe outside the oil receiver, causing the floating pad to be severely worn or stuck. The insulating member provided in the present application can effectively avoid the shaft current formed by metal sliding friction. For example, the shaft current generated by discharge will cause cross-corrosion to the shaft surfaces of the bearings of the unit, destroy the oil film, heat the bearing, and even cause the bearing surface to burn. It also avoids the problem of reduced turbine oil quality caused by worn metal powder. Therefore, the use safety of the oil receiver is improved.

[0010] In addition, the problem of wear of the opening indicator rod during movement and the problem of poor opening indication accuracy caused by pointer deviation are further avoided, thereby helping to improve the service life of the opening indicator rod and the accuracy of opening indication.

[0011] In addition, the insulating member added in the present application is relatively low in cost, and the discharge circuit can be blocked without adding an additional complex structure. Therefore, the oil receiver has the advantages of low cost and high safety in use.

[0012] The oil receiver of the water turbine according to the embodiment of the present invention has the advantages of improved service life and use safety.

[0013] In some embodiments, the insulating member is an insulating rolling member, and the insulating rolling member is in rolling cooperation with the groove wall of the monitoring groove.

[0014] In some embodiments, the insulating rolling element includes an inner ring, an outer ring and a plurality of balls; at least one of the inner ring, the balls and the outer ring is an insulating element, the plurality of balls are rollably spaced between the inner ring and the outer ring, the inner ring is connected to the other end of the opening indicator rod, the outer ring is rollingly engaged with the groove wall of the monitoring groove, and the outer ring is rollingly engaged with the groove wall of the monitoring groove.

[0015] In some embodiments, the outer ring is an insulating ring.

[0016] In some embodiments, the outer peripheral wall of the outer ring has a concave limiting ring groove, and a portion of the wall plate of the monitoring groove is slidably fitted in the limiting ring groove.

[0017] In some embodiments, the oiler shell includes an oiler cover, an oiler main shell and an oiler shell seat which are sequentially connected along the axis of the oiler shell, the oiler main shell has the installation cavity, the operating oil pipe is movably passed through the oiler main shell along the axial direction of the oiler shell, the oiler cover has the monitoring groove, and the insulating rolling element is rollably passed through the monitoring groove.

[0018] In some embodiments, the oil receiving hood includes a hood body and a perspective plate, the hood body having a perspective window, the perspective plate being arranged on the perspective window, the perspective plate having an extension ring plate extending inwardly and a limit plate extending inwardly along the end of the extension ring plate, the limit plate being spaced apart from the perspective plate to define a limit cavity between the limit plate and the perspective plate, the limit plate having the monitoring groove, and the part of the limit plate forming the monitoring groove being engaged in the limit ring groove of the outer ring.

[0019] In some embodiments, the opening indicator rod includes an indicator rod body and an indicator needle arranged at one end of the indicator rod body, the indicator needle is arranged corresponding to the opening mark, one end of the indicator rod body is connected to the oil receiving cover, and the indicator needle is arranged in the limit cavity.

[0020] In some embodiments, the bearing seat includes a bearing and a bearing cover, the inner ring of the bearing is sleeved on the operating oil pipe, the bearing cover is covered on the outer ring of the bearing, and the bearing cover has an annular flange extending outward, the annular flange has an indicator rod matching hole, and the one end of the opening indicator rod is fixedly inserted into the indicator rod matching hole.

[0021] The water turbine according to the embodiment of the present invention comprises the oil receiver of the water turbine according to any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereoscopic view of the oil receiver of the water turbine according to the embodiment of the present invention.

[0023] Figure 2 It is another stereoscopic view of the oil receiver of the water turbine according to the embodiment of the present invention.

[0024] Figure 3 It is a front view of an oil receiver of a water turbine according to an embodiment of the present invention.

[0025] Figure 4 yes Figure 3 Section view along line AA.

[0026] Figure 5 yes Figure 4 Enlarged view at B.

[0027] Figure 6 yes Figure 4 Enlarged view at C.

[0028] Figure 7 It is a diagram showing the coordination of the opening indicating rod and the insulating member according to an embodiment of the present invention.

[0029] Figure 8 yes Figure 7 Enlarged view at D.

[0030] Fig. 9 is a three-dimensional diagram of an insulating member according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] Oil receiver shell 1;

[0033] Oil receiving cover 11; cover body 111; perspective plate 112; monitoring slot 113; limit cavity 114; extension ring plate 115; limit plate 116;

[0034] Oil receiver main shell 12; oil receiver shell seat 13;

[0035] Operating oil pipe 2;

[0036] Bearing seat 3; bearing 31; bearing cover 32; annular flange 33;

[0037] Opening indicating rod 4; indicating rod body 41; indicating needle 42;

[0038] Insulating member 5; inner ring 51; ball 52; outer ring 53; limiting ring groove 531. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] Reference below Figure 1-Figure 9 An oil receiver for a water turbine and a water turbine according to an embodiment of the present invention are described.

[0041] The oil receiver of the water turbine according to the embodiment of the present invention comprises an oil receiver housing 1 , an operating oil pipe 2 , a bearing 31 seat 3 , an opening indicator rod 4 and an insulating member 5 .

[0042] The oil receiver housing 1 has a mounting cavity and a monitoring slot 113. One end of the oil receiver body can extend into the front oil tank. The operating oil pipe 2 is arranged along the axial direction of the oil receiver housing 1 ( Figure 131 is movably inserted into the installation cavity, and the bearing seat 31 is sleeved on the operating oil pipe 2; one end of the opening indicator rod 4 is connected to the bearing seat 31, and the insulating member 5 is sleeved on the other end of the opening indicator rod 4, and the insulating member 5 can be relatively movably matched with the groove wall of the monitoring groove 113 as the opening indicator rod 4 moves.

[0043] The oil receiver of the hydraulic turbine of the embodiment of the present invention can avoid metal sliding friction when the opening indicator rod 4 is in direct contact with the oil receiver shell 1 and moves relative to each other by providing an insulating member 5 at one end of the opening indicator rod 4. The metal sliding friction will cause shaft current, which will cause the floating ring oil film to be destroyed and cause heating or burning, and it is easy to cause electric spark discharge. At the same time, the metal sliding friction will also increase the friction between the floating pad of the oil receiver and the operating oil pipe 2 outside the oil receiver, causing the floating pad to be seriously worn or stuck (for example, when the blade moves, oil will flow from the floating pad of the oil receiver, and a large amount of pressure oil will cause an accidental low oil pressure and shutdown. A large amount of accumulated oil cannot flow to the return oil tank in a short time, causing the oil receiver to leak oil to the slip ring chamber and the stator and rotor parts, thereby causing the unit to shut down unexpectedly). The insulating member 5 provided in the present application can effectively avoid the shaft current formed by metal sliding friction, and effectively isolate and release the transfer of electric charge. For example, the shaft current generated by discharge will cause cross erosion of the shaft surface of each bearing 31 of the unit, destroy the oil film, heat the bearing, and even cause the problem of burning of the bearing surface. The invention also avoids the problem of turbine oil quality degradation caused by worn metal powder, and completely eliminates the discharge phenomenon. Furthermore, the use safety of the oil receiver is improved.

[0044] In addition, the problem of wear of the opening indicator rod 4 during movement and the problem of poor opening indication accuracy caused by pointer deviation and stress are further avoided, thereby helping to improve the service life of the opening indicator rod 4 and the opening indication accuracy.

[0045] In addition, the insulating member 5 added in the present application is relatively low in cost and can block the discharge circuit without adding an additional complex structure. Therefore, the oil receiver of the hydraulic turbine in the embodiment of the present invention has the advantages of low cost and high safety in use.

[0046] The oil receiver of the water turbine according to the embodiment of the present invention has the advantages of improved service life and use safety.

[0047] like Figures 5 to 8 As shown, the insulating member 5 is an insulating rolling member, and the insulating rolling member and the groove wall of the monitoring groove 113 are in rolling cooperation.

[0048] The oil receiver of the hydraulic turbine of the embodiment of the present invention not only avoids direct sliding friction between the opening indicator rod 4 and the oil receiver shell 1 by setting the insulating member 5 as an insulating rolling member and rolling the insulating rolling member with the groove wall of the monitoring groove 113, but also makes the insulating rolling member roll with the groove wall of the monitoring groove 113, thereby reducing the problem of component wear caused by rolling friction between the two. Therefore, the oil receiver has the advantage of helping to increase the service life of the insulating rolling member.

[0049] like Figure 8 and Fig. 9 As shown, the insulating rolling element includes an inner ring 51, an outer ring 53 and a plurality of balls 52; at least one of the inner ring 51, the balls 52 and the outer ring 53 is an insulating element 5, and the plurality of balls 52 are rollably spaced between the inner ring 51 and the outer ring 53; the inner ring 51 is connected to the other end of the opening indicator rod 4, and the outer ring 53 is in rolling cooperation with the groove wall of the monitoring groove 113, and the outer ring 53 is in rolling cooperation with the groove wall of the monitoring groove 113. It can be understood that one of the inner ring 51, the outer ring 53 and the balls 52 is an insulating element 5. Or two of the inner ring 51, the outer ring 53 and the balls 52 are insulating elements 5. Or the inner ring 51, the outer ring 53 and the balls 52 are all insulating elements 5.

[0050] The oil receiver of the water turbine according to the embodiment of the present invention is provided by dividing the insulating rolling element into an inner ring 51, an outer ring 53 and a plurality of balls 52, and at least one of the inner ring 51, the balls 52 and the outer ring 53 is an insulating element 5. The balls 52 can realize rolling cooperation between the inner ring 51 and the outer ring 53, so that the inner ring 51 is sleeved on the other end of the opening indicator rod 4, and the outer ring 53 is stuck in the monitoring groove 113 and moves relative to the monitoring groove 113. The inner ring 51, the balls 52 and the outer ring 53 of the oil receiver of the water turbine according to the embodiment of the present invention have the advantage of simple structure.

[0051] Furthermore, the outer ring 53 is an insulating ring. By only setting the insulating ring as an insulating ring, it is possible to maintain good structural strength while avoiding the problem of rolling jamming caused by deformation of the entire insulating rolling element. Therefore, the oil receiver has the advantages of high structural strength and good rolling performance.

[0052] Optionally, the outer ring 53 can be made of high-strength, wear-resistant nylon insulating material, which has good corrosion resistance and aging resistance and can adapt to more severe working environments. It can effectively isolate and release the transfer of electric charges while ensuring friction performance. For example, the outer ring 53 can be a double-layer structure made of metal and nylon, that is, the outer wall is made of metal material, the outer wall is made of nylon material, and the nylon material is wrapped on the outer wall surface of the metal material. Therefore, the oil receiver further maintains high structural strength and rolling performance.

[0053] like Figure 8 and Fig. 9As shown, the outer peripheral wall of the outer ring 53 has an inwardly concave limiting ring groove 531 , and a part of the wall plate of the monitoring groove 113 is slidably fitted in the limiting ring groove 531 .

[0054] The oil receiver of the hydraulic turbine of the embodiment of the present invention has a concave limiting ring groove 531 on the outer peripheral wall of the outer ring 53, and a part of the wall plate of the monitoring groove 113 is slidably fitted in the limiting ring groove 531, thereby preventing the opening indicator rod 4 from shaking during the movement. Therefore, the oil receiver improves the accuracy of the opening indication.

[0055] Furthermore, the portion of the outer peripheral wall of the outer ring 53 having the limiting ring groove 531 can be stuck in the thickness direction of the oil receiver shell 1 to prevent the insulating member 5 from shaking.

[0056] like Figures 1 to 4 As shown, the oil receiver shell 1 includes an oil receiver cover 11, an oil receiver main shell 12 and an oil receiver shell seat 13 which are sequentially connected along the axis of the oil receiver shell 1. The oil receiver main shell 12 has a mounting cavity. The operating oil pipe 2 is movably inserted into the oil receiver main shell 12 along the axial direction of the oil receiver shell 1. The oil receiver cover 11 has a monitoring groove 113, and the insulating rolling element is rollably inserted into the monitoring groove 113.

[0057] The oil receiver of the turbine in the embodiment of the present invention divides the oil receiver shell 1 into an oil receiver cover 11, an oil receiver main shell 12 and an oil receiver shell seat 13, and the insulating rolling element can be rolled in the monitoring groove 113 on the oil receiver cover 11, so that the oil receiver has the advantages of simple structure and good compatibility.

[0058] Furthermore, the oil receiver main housing 12 has a cylindrical section and a closing section.

[0059] like Figure 2 and Figure 4 As shown, the oil receiving hood 11 includes a hood body 111 and a perspective plate 112, the hood body 111 is provided with a perspective window, the perspective plate 112 is arranged on the perspective window, the perspective plate 112 includes an extension ring plate 115 extending inwardly and a limit plate 116 extending inwardly along the end of the extension ring plate 115, the limit plate 116 is spaced apart from the perspective plate 112 to define a limit cavity 114 between the limit plate 116 and the perspective plate 112, the limit plate 116 is provided with a monitoring groove 113, and the part of the limit plate 116 forming the monitoring groove 113 is engaged in the limit ring groove 531 of the outer ring 53.

[0060] The oil receiver of the water turbine in the embodiment of the present invention has a perspective window on the cover body 111, a perspective plate 112 is arranged on the perspective window, an extension ring plate 115 extending inwardly from the perspective plate 112 and a limit plate 116 extending inwardly along the end of the extension ring plate 115, the limit plate 116 is arranged at a distance from the perspective plate 112, and the setting of the perspective plate 112 can cover the opening indicator rod 4 in the oil receiver shell 1, thereby avoiding the problem of leakage of electricity and oil caused by the exposure of the opening indicator rod 4.

[0061] The limiting plate 116 , the cover body 111 , and the extending ring plate 115 may be integrally formed.

[0062] The opening indicator rod 4 includes an indicator rod body 41 and an indicator needle 42 arranged at one end of the indicator rod body. One end of the indicator rod body 41 is connected to the oil receiving cover, and the indicator needle 42 is arranged in the limiting cavity 114 .

[0063] like Figure 4 and Figure 6 As shown, the bearing 31 seat 3 includes a bearing 31 and a bearing cover 32, the inner ring of the bearing 31 is sleeved on the operating oil pipe 2, the bearing cover 32 covers the outer ring 53 of the bearing 31, and the bearing cover 32 has an annular flange 33 extending outward, the annular flange 33 has an indicator rod matching hole, and one end of the opening indicator rod 4 is fixedly inserted into the indicator rod matching hole.

[0064] The oil receiver of the water turbine of the embodiment of the present invention is provided by the bearing 31 seat 3 including the bearing 31 and the bearing cover 32, and the annular flange 33 extending outward from the bearing cover 32, and one end of the opening indicator rod 4 is fixedly inserted into the indicator rod matching hole of the annular flange 33. Therefore, the oil receiver of the water turbine of the embodiment of the present invention has the advantage of high structural stability.

[0065] Furthermore, the indicator rod matching hole can be a threaded hole, and the opening indicator rod 4 is threadedly matched in the indicator rod matching hole. Therefore, the oil receiver has the advantage of high convenience in disassembly and assembly.

[0066] The water turbine according to the embodiment of the present invention comprises the oil receiver of the water turbine according to any one of the above items.

[0067] The water turbine of the embodiment of the present invention has the advantages of avoiding equipment damage caused by the formation of shaft current and having low cost.

[0068] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An oil receiver for a water turbine, characterized in that: include: An oil receiver shell, wherein the oil receiver shell has a mounting cavity and a monitoring slot, and the monitoring slot has an opening mark; An operating oil pipe and a bearing seat, one end of the oil receiver body can extend into the front oil tank, the operating oil pipe is movably inserted into the installation cavity along the axial direction of the oil receiver shell, and the bearing seat is sleeved on the operating oil pipe; An opening indicator rod and an insulating member, one end of the opening indicator rod is connected to the bearing seat, the insulating member is sleeved on the other end of the opening indicator rod, and the insulating member is movably matched with the groove wall of the monitoring groove.

2. The oil receiver of a water turbine according to claim 1, characterized in that: The insulating member is an insulating rolling member, and the insulating rolling member is in rolling cooperation with the groove wall of the monitoring groove.

3. The oil receiver of a water turbine according to claim 2, characterized in that: The insulating rolling element includes an inner ring, an outer ring and a plurality of balls; at least one of the inner ring, the balls and the outer ring is an insulating element, the plurality of balls are rollably spaced between the inner ring and the outer ring, the inner ring is connected to the other end of the opening indicator rod, the outer ring is rollingly matched with the groove wall of the monitoring groove, and the outer ring is rollingly matched with the groove wall of the monitoring groove.

4. The oil receiver of a water turbine according to claim 3, characterized in that: The outer ring is an insulating ring.

5. The oil receiver of a water turbine according to claim 3, characterized in that: The outer peripheral wall of the outer ring has an inwardly concave limiting ring groove, and a part of the wall plate of the monitoring groove is slidably fitted in the limiting ring groove.

6. The oil receiver of a water turbine according to claim 5, characterized in that: The oil receiver shell includes an oil receiver cover, an oil receiver main shell and an oil receiver shell seat which are sequentially connected and arranged along the axis of the oil receiver shell. The oil receiver main shell has the installation cavity. The operating oil pipe is movably passed through the oil receiver main shell along the axial direction of the oil receiver shell. The oil receiver cover has the monitoring groove. The insulating rolling element is rollably passed through the monitoring groove.

7. The oil receiver of a water turbine according to claim 6, characterized in that: The oil receiving hood includes a hood body and a perspective plate, the hood body is provided with a perspective window, the perspective plate is arranged on the perspective window, the perspective plate includes an extension ring plate extending inwardly and a limit plate extending inwardly along the end of the extension ring plate, the limit plate is spaced apart from the perspective plate to define a limit cavity between the limit plate and the perspective plate, the limit plate is provided with the monitoring groove, and the part of the limit plate forming the monitoring groove is engaged in the limit ring groove of the outer ring.

8. The oil receiver of a water turbine according to claim 7, characterized in that: The opening indicator rod comprises an indicator rod body and an indicator needle arranged at one end of the indicator rod body, the indicator needle is arranged corresponding to the opening mark, one end of the indicator rod body is connected to the oil receiving cover, and the indicator needle is arranged in the limit cavity.

9. The oil receiver of a water turbine according to claim 1, characterized in that: The bearing seat includes a bearing and a bearing cover, the inner ring of the bearing is sleeved on the operating oil pipe, the bearing cover is covered on the outer ring of the bearing, and the bearing cover has an annular flange extending outward, the annular flange has an indicator rod matching hole, and one end of the opening indicator rod is fixedly inserted into the indicator rod matching hole.

10. A water turbine, characterized in that: An oil receiver comprising a water turbine according to any one of claims 1-9.

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