Oil flow circulation structure of push and guide combination bearing of generator motor

Abstract

The invention relates to the technical field of vertical hydro-generators, and discloses a generator motor pushing and guiding combination bearing oil flow circulation structure which is composed of a rack, an upper oil baffle, a thrust block, an oil baffle pipe, an inner oil baffle, a floating ring, a guide shoe assembly, an oil separation ring, a runner plate, a thrust shoe, an elastic oil tank support and a lower oil baffle. The inner oil shield is screwed on the rack through the second bolt, a gap is reserved between the inner oil shield and the thrust block, the floating ring is supported on the rack through the third bolt, a gap is reserved between the floating ring and the thrust block, the oil separation ring is screwed on the rack through the fourth bolt, the guide shoe assembly falls on the oil separation ring, the runner plate is fastened below the thrust block through the fifth bolt, and the thrust shoe is tightly attached to the lower portion of the runner plate. The elastic oil tank support is arranged on the elastic oil tank support, the sixth bolt tightens the elastic oil tank support on the machine frame, the seventh bolt tightens the lower oil baffle below the machine frame, the eighth bolt tightens the oil baffle pipe on the lower oil baffle, an oil circulation path is clear, the situation that the bearing bush temperature is too high is avoided, multiple barriers are arranged, and oil flow splashing and oil mist escaping are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of vertical water turbine generators, and in particular to a generator motor derived combined bearing oil flow circulation structure. Background Art

[0002] In a vertical hydro-turbine generator, due to the high-speed rotation of the unit, the oil flow circulation path in the bearing combination plays a vital role in the oil mist problem of the bearing combination. If the oil flow circulation path in the bearing combination is not clear, there will be a risk of increased bearing temperature and even burning bearing accidents. In addition, under the action of the negative pressure outside the oil tank, the oil mist will escape from the oil tank and enter the inside of the stator and rotor and the maintenance channel, posing a hidden danger to the safe operation of the unit and the safety of the maintenance personnel. Summary of the invention

[0003] The purpose of the present invention is to disclose a generator motor derived combined bearing oil flow circulation structure, which has the characteristics of simple adjustment process, convenient installation and replacement, clear oil circulation path, avoidance of excessive bearing temperature, prevention of oil flow splashing, and escape of oil mist.

[0004] The technical solution of the present invention is as follows: a generator motor derivation combined bearing oil flow circulation structure, which consists of a frame, an upper oil baffle, a thrust head, an oil baffle pipe, an inner oil baffle, a floating ring, a guide shoe assembly, an oil separator ring, a mirror plate, a thrust shoe, an elastic oil tank support, and a lower oil baffle. The first bolt tightens the upper oil baffle on the frame, the second bolt tightens the inner oil baffle on the frame and leaves a gap with the thrust head, the third bolt supports the floating ring on the frame and leaves a gap with the thrust head, the fourth bolt tightens the oil separator ring on the frame, the guide shoe assembly falls on the oil separator ring, the fifth bolt tightens the mirror plate under the thrust head, the thrust shoe is tightly attached to the bottom of the mirror plate and is placed on the elastic oil tank support, the sixth bolt tightens the elastic oil tank support on the frame, the seventh bolt tightens the lower oil baffle under the frame, and the eighth bolt tightens the oil baffle pipe on the lower oil baffle.

[0005] In the above-mentioned generator motor derived combined bearing oil flow circulation structure, the upper oil baffle is connected by nine bolts to the first upper oil baffle and the second upper oil baffle, a first sealing groove is set at the joint of the first upper oil baffle, and a second sealing groove is set at the joint of the second upper oil baffle, which is connected to the third sealing groove on the frame to form an enclosed structure.

[0006] In the above-mentioned generator motor derived combined bearing oil flow circulation structure, the outer ring of the floating ring is processed into an inverted L shape, which is attached to the ring plate on the frame, a gap is left between the inner ring and the thrust head, and the third bolt is placed in the square groove of the frame.

[0007] In the above-mentioned generator motor derived combined bearing oil flow circulation structure, the oil separator ring is tightened under the ring plate by the tenth bolt, and a gap is left between the vertical ring and the mirror plate, and a gap is left between the ring plate and the thrust head.

[0008] In the above-mentioned generator motor derived combined bearing oil flow circulation structure, a flat pressure hole is opened on the thrust head to connect the first oil chamber and the second oil chamber, a pump hole is opened to connect the third oil chamber and the fourth oil chamber, and an annular groove is opened on the thrust head to tighten the cover plate in the annular groove with the eleventh bolt.

[0009] In the above-mentioned generator motor derived combined bearing oil flow circulation structure, a step is provided on the oil retaining pipe, and the pump ring is tightened on the step by the twelfth bolt.

[0010] Compared with the prior art, the technical effects of the present invention are:

[0011] 1. Simple adjustment process, easy installation and replacement. The oil baffles in the combined oil tank are made of aluminum and adopt a petal structure. Compared with steel structures, they are lighter and easier to remove and install when the unit needs to be repaired.

[0012] 2. The oil circulation path is clear to avoid excessive bearing temperature. Since the oil tank is shared by the thrust bearing and the guide bearing, an oil separator ring is set between the thrust bearing and the guide bearing to divide the guide bearing and the thrust bearing into two chambers. After the cold oil enters the oil tank, a part of the cold oil is pumped into the guide bearing chamber through the pump hole, and flows into the oil tank after cooling the guide bearing. A part of the oil is used to cool the thrust bearing. The oil circulation path is clear to avoid excessive bearing temperature.

[0013] 3. It can effectively prevent the splashing of oil flow and the escape of oil mist. In the oil groove of the derivation combination bearing, a floating ring, an inner oil baffle and an upper oil baffle are set above the guide bush to form multiple barriers. The first barrier, the floating ring, prevents the oil flow from splashing upwards, the second barrier, the inner oil baffle, blocks the oil mist, and the third barrier, the upper oil baffle, prevents the oil mist from escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the present invention.

[0015] Figure 2 This is the structural diagram of the oil baffle.

[0016] Figure 3 This is the structural diagram of the floating ring.

[0017] Figure 4 This is the structural diagram of the oil separator ring.

[0018] Figure 5 This is the structural diagram of the thrust head.

[0019] Figure 6 This is the structural diagram of the oil retaining pipe.

[0020] Component number description in the attached drawings: 1-frame; 2-upper oil stopper; 3-thrust head; 4-oil stopper pipe; 5-inner oil stopper; 6-floating ring; 7-guide bushing assembly; 8-oil separator ring; 9-mirror plate; 10-thrust bushing; 11-elastic oil tank support; 12-lower oil stopper; 13-first bolt; 14-second bolt; 15-inner oil stopper; 16-floating ring; 17-fifth bolt; 18-sixth bolt 19-seventh bolt; 20-eighth bolt; 21-ninth bolt; 22-upper oil stopper; 23-second Upper oil baffle; 24-first sealing groove; 25-second sealing groove; 26-third sealing groove; 27-ring plate; 28-outer ring; 29-inverted L-shape; and 30-inner ring; 31-square groove; 32 tenth bolt; 33-vertical ring; 34-ring plate; 35-flattening hole; 36-first oil chamber; 37-second oil chamber; 38-pump hole; 39 third oil chamber; 40-fourth oil chamber; 41-ring groove; 42-cover plate; 43-eleventh bolt; 44-step; 45-twelfth bolt; 46-pump ring. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown, the oil flow circulation structure of the generator motor derivation combined bearing is composed of a frame 1, an upper oil baffle 2, a thrust head 3, an oil baffle pipe 4, an inner oil baffle 5, a floating ring 6, a guide bush assembly 7, an oil separator ring 8, a mirror plate 9, a thrust bush 10, an elastic oil tank support 11, and a lower oil baffle 12. The first bolt 13 tightens the upper oil baffle 2 on the frame 1, the second bolt 4 tightens the inner oil baffle 5 on the frame 1 to leave a gap with the thrust head 3, and the third bolt 15 supports the floating ring 6 on the frame 6. Leave a gap with the thrust head 3, the fourth bolt 16 tightens the oil separator ring 8 to the frame 1, the guide shoe assembly 7 falls on the oil separator ring 8, the fifth bolt 17 tightens the mirror plate 9 under the thrust head 3, the thrust shoe 10 is tightly attached to the bottom of the mirror plate 9 and is placed on the elastic oil tank support 11, the sixth bolt 18 tightens the elastic oil tank support 11 to the frame 1, the seventh bolt 19 tightens the lower oil baffle 12 under the frame, and the eighth bolt 20 tightens the oil baffle pipe 4 to the lower oil baffle 12.

[0023] like Figure 2 As shown, the upper oil stopper 1 is connected to the first upper oil stopper 22 and the second upper oil stopper 23 by the ninth bolt 21, a first sealing groove 24 is provided at the joint of the first upper oil stopper 22, and a second sealing groove 25 is provided at the joint of the second upper oil stopper 23, which are connected to the third sealing groove 26 on the frame 1 to form an enclosed structure.

[0024] Specifically, the oil in the oil tank may seep out through the joint surface. To prevent the oil in the oil tank from seeping out or escaping, a sealing groove is provided at the joint surface and connected to the circumferential sealing groove of the frame to form an enclosing structure to seal the oil in the oil tank within its enclosing circle.

[0025] like Figure 3 As shown, the outer ring 28 of the floating ring 6 is processed into an inverted L-shape 29, which is in contact with the ring plate 27 on the frame 1, and a gap is left between the inner ring 30 and the thrust head 3, and the third bolt 15 is placed in the square groove 31 of the frame 1.

[0026] Specifically, the floating ring is attached to the ring plate on the frame and can slide freely up and down. When there is too much oil in the guide shoe cavity, the floating ring is lifted up to splash upward. Under the action of its own weight, the floating ring prevents the oil from splashing upward.

[0027] like Figure 4 As shown, the oil separator ring 8 is fastened by the tenth bolt 32 to the vertical ring 33 below the ring plate 34, a gap is left between the vertical ring 33 and the mirror plate 9, and a gap is left between the ring plate 34 and the thrust head 3.

[0028] Specifically, the oil separator ring divides the guide bearing and the thrust bearing into two cavities in the axial direction, preventing the hot oil in the thrust bearing cavity from entering the guide bearing cavity, and blocks the splashing of the oil flow after cooling the thrust bearing in the radial direction.

[0029] like Figure 5 As shown, a flat pressure hole 35 is provided on the thrust head 3 to connect the first oil chamber 36 with the second oil chamber 37, a pump hole 38 is provided to connect the third oil chamber 39 with the fourth oil chamber 40, and an annular groove 41 is provided on the thrust head 3, and the cover plate 42 is tightened in the annular groove 41 with the eleventh bolt 43.

[0030] Specifically, the flat pressure hole connects the inner and outer cavities of the thrust head, injects the oil mist in the inner cavity into the outer cavity, and the pump hole injects cold oil into the guide bearing cavity to cool the guide bearing, and seals the bolt holes of the thrust head and the mirror plate to prevent oil from entering the joint surface of the thrust head and the mirror plate and corroding its surface.

[0031] like Figure 6 As shown, a step 44 is provided on the oil retaining pipe 4, and a pump ring 46 is fastened to the step 44 by a twelfth bolt 45.

[0032] Specifically, when the unit rotates at high speed, the oil flow rotates in the oil groove, and the pump ring prevents the oil flow from entering the upper cavity, avoiding internal swinging caused by the oil level in the upper cavity being too high.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the claims and their equivalents.

Claims

1. A generator motor derivation combined bearing oil flow circulation structure, characterized in that: The invention comprises a frame (1), an upper oil baffle (2), a thrust head (3), an oil baffle pipe (4), an inner oil baffle (5), a floating ring (6), a guide bush assembly (7), an oil separator ring (8), a mirror plate (9), a thrust bush (10), an elastic oil tank support (11), and a lower oil baffle (12). The upper oil baffle (2) is tightened onto the frame (1) by a first bolt (13), the inner oil baffle (5) is tightened onto the frame (1) by a second bolt (14) to leave a gap between the inner oil baffle (5) and the thrust head (3), and the floating ring (6) is supported on the frame (6) by a third bolt (15) to connect the upper oil baffle (2) to the thrust head (3). A gap is left, the fourth bolt (16) tightens the oil separator ring (8) onto the frame (1), the guide shoe assembly (7) falls on the oil separator ring (8), the fifth bolt (17) tightens the mirror plate (9) below the thrust head (3), the thrust shoe (10) is tightly attached to the bottom of the mirror plate (9) and is placed on the elastic oil tank support (11), the sixth bolt (18) tightens the elastic oil tank support (11) onto the frame (1), the seventh bolt (19) tightens the lower oil baffle (12) below the frame, and the eighth bolt (20) tightens the oil baffle pipe (4) onto the lower oil baffle (12).

2. The generator motor derivation combined bearing oil flow circulation structure according to claim 1, characterized in that: The upper oil stopper (1) is connected to the first upper oil stopper (22) and the second upper oil stopper (23) by a ninth bolt (21); a first sealing groove (24) is provided at the joint of the first upper oil stopper (22); a second sealing groove (25) is provided at the joint of the second upper oil stopper (23), and the two grooves are connected to the third sealing groove (26) on the frame (1), thereby forming an enclosed structure.

3. The generator motor derivation combined bearing oil flow circulation structure according to claim 1, characterized in that: The outer ring (28) of the floating ring (6) is processed into an inverted L-shape (29) and is in contact with the ring plate (27) on the frame (1). A gap is left between the inner ring (30) and the thrust head (3). The third bolt (15) is placed in a square groove (31) of the frame (1).

4. The generator motor derivation combined bearing oil flow circulation structure according to claim 1, characterized in that: The oil separator ring (8) is fastened by the tenth bolt (32) to the vertical ring (33) below the ring plate (34), a gap is left between the vertical ring (33) and the mirror plate (9), and a gap is left between the ring plate (34) and the thrust head (3).

5. The generator motor derivation combined bearing oil flow circulation structure according to claim 1, characterized in that: The thrust head (3) is provided with a pressure-equalizing hole (35) to connect the first oil chamber (36) with the second oil chamber (37), a pump hole (38) to connect the third oil chamber (39) with the fourth oil chamber (40), and an annular groove (41) is provided on the thrust head (3) to tighten the cover plate (42) in the annular groove (41) with an eleventh bolt (43).

6. The generator motor derivation combined bearing oil flow circulation structure according to claim 1, characterized in that: The oil retaining pipe (4) is provided with a step (44), and the pump ring (46) is fastened to the step (44) by a twelfth bolt (45).

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