Device for adjusting and locking water turbine cylindrical bush gap

Abstract

The utility model relates to the technical field of water turbine cylinder type tile gap locking equipment, in particular to a device for adjusting and locking a water turbine cylinder type tile gap, which comprises a wedge block, and a base is sleeved on the rear side of the surface of the wedge block. The utility model solves the problems that the anti-loosening function fails, so that the restraining effect of the water guide bearing on the main shaft of the water turbine is weakened, the vibration and the swing of the water guide bearing during the operation of a unit are increased, and the safe and stable operation of the unit is influenced. Stepless adjustment and locking are carried out through the wedge block set with the inclination of 1: 20, the wedge plate adjusting screw rod and the wedge plate locking screw rod, the adjustment precision of the cylinder type tile gap is converted from the micron level to the millimeter level, the operation difficulty is reduced, the error-tolerant rate and the working efficiency are improved, and the working efficiency is improved. The contact matching position of the wedge block and the water guide shoe flange is designed to be an arc-shaped surface, so that the attaching degree and the contact area between the wedge block and the water guide shoe flange are increased, and the conditions of instability and stress concentration of original point contact are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water turbine barrel-type tile gap locking equipment, in particular to a device for adjusting and locking the water turbine barrel-type tile gap. Background Art

[0002] The cylinder bearing gap of the turbine with a cylinder water guide bearing structure is usually not equipped with a device for directly adjusting the gap. The structural design of locking the cylinder bearing gap is locked by positioning pins or bolt top screws in most units, and a small number of units are locked only by fastening bolts. When pins are used for positioning and locking on the turbine, the cylinder water guide bearing can no longer be moved and adjusted under the action of the positioning pins. Therefore, the gap adjustment of the water guide bearing can only be achieved by pushing the main shaft of the turbine.

[0003] However, the method of pushing the shaft will make the gap between the impeller leakage-proof ring and the main shaft seal uneven, which will lead to the misalignment of the unit center, increase the hydraulic imbalance of the turbine, and affect the stability of the unit. In the case of using a bolt and screw structure for locking on the turbine, the water guide shoe fastening bolts will loosen slightly under the long-term vibration conditions of the unit operation. After the water guide shoe fastening bolts become loose, the locking bolt screws will loosen under the influence of the force of the water guide shoe flange and the vibration of the unit operation, resulting in the failure of its anti-loosening function, thereby weakening the restraining effect of the water guide bearing on the turbine main shaft, increasing the vibration during unit operation and the swing of the water guide bearing, affecting the safe and stable operation of the unit.

[0004] In order to solve the above technical problems, we have designed a device for adjusting and locking the gap between the cylinder bearings of the turbine. Utility Model Content

[0005] The utility model aims to provide a device for adjusting and locking the gap of the drum-type bearing of a water turbine, which has the advantages of convenient adjustment and locking, solves the problem that the anti-loosening function fails, thereby weakening the restraining effect of the water guide bearing on the main shaft of the water turbine, increasing the vibration of the unit during operation and the swing of the water guide bearing, and affecting the safe and stable operation of the unit.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for adjusting and locking the gap of a turbine barrel-type shoe, comprising a wedge block, a base is sleeved and installed on the rear side of the wedge block surface, a pressure block is fixedly connected to the top of the base, a wedge plate adjustment screw is penetrated at the center of the front side of the top of the pressure block, the wedge plate adjustment screw penetrates the pressure block and is threadedly connected to the top of the wedge block, pressure block fixing screws are penetrated on both sides of the rear side of the top of the pressure block, the bottom of the pressure block fixing screw penetrates the pressure block and is threadedly connected to the top of the base, and wedge plate locking screws are penetrated on both sides of the front side of the top of the pressure block.

[0007] Preferably, a pressure block back plate is fixedly welded to the rear side of the pressure block, a pressure block fixing screw through-hole cooperating with the pressure block fixing screw is opened on the top of the pressure block, and pressure block fixing screw threaded holes cooperating with the pressure block fixing screw are opened on the left and right sides of the top of the base.

[0008] Preferably, an adjusting screw threaded hole used in conjunction with the wedge plate adjusting screw is opened at the center of the top of the wedge block, and the pressure block fixing screw passes through the pressure block fixing screw through-hole and is threadedly connected to the inner cavity of the pressure block fixing screw threaded hole.

[0009] Preferably, a wedge plate adjustment screw through-hole cooperating with the wedge plate adjustment screw is formed at the center of the top front side of the pressure block, a locking nut is provided on the top threaded sleeve on the surface of the wedge plate adjustment screw, the wedge plate adjustment screw passes through the wedge plate adjustment screw through-hole and is threadedly connected to the inner cavity of the adjustment screw threaded hole.

[0010] Preferably, the left and right sides of the front side of the base are fixedly connected to the limiting slide rails, the left and right sides of the wedge block are in sliding contact with the surfaces of the limiting slide rails on both sides respectively, and the rear side of the wedge block is in sliding contact with the front side of the base.

[0011] Preferably, wedge plate locking screw holes cooperating with the wedge plate locking screw are provided on both left and right sides of the front side of the top of the pressing block, and a locking nut is provided on the top thread sleeve of the surface of the wedge plate locking screw.

[0012] Preferably, the bottom of the wedge plate locking screw passes through the wedge plate locking screw hole and contacts the top of the wedge block.

[0013] Preferably, the slope of the wedge block is 1:20, the mating surface with the cylindrical flange is an arc surface, and the base is welded to the turbine top cover.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model adopts a wedge block group with a slope of 1:20, a wedge plate adjusting screw and a wedge plate locking screw for adjustment and locking, thereby converting the adjustment accuracy of the barrel-type tile gap from micron level to millimeter level adjustment, reducing the difficulty of operation, and improving the fault tolerance rate and work efficiency.

[0016] 2. The utility model realizes radial adjustment of the bearing bush through axial adjustment of the wedge block, changes the adjustment direction, and increases the operating space.

[0017] 3. The utility model designs the contact point between the wedge block and the water guide flange as an arc surface to increase the fit and contact area between the two, thereby improving the instability of the original point contact and the force concentration.

[0018] 4. The utility model designs a limit slide rail on the inclined surface of the base to prevent the wedge from sliding left and right, thereby enhancing the locking function of the wedge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 It is an exploded three-dimensional schematic diagram of the utility model.

[0021] In the figure: 1. wedge block; 2. adjusting screw threaded hole; 3. base; 4. pressure block fixing screw threaded hole; 5. limiting slide rail; 6. pressure block; 7. back plate; 8. pressure block fixing screw through hole; 9. wedge plate locking screw hole; 10. wedge plate adjusting screw through hole; 11. wedge plate adjusting screw; 12. pressure block fixing screw; 13. wedge plate locking screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 2 A device for adjusting and locking the gap of a turbine barrel-type tile comprises a wedge block 1, a base 3 is sleeved and installed on the rear side of the surface of the wedge block 1, a pressure block 6 is fixedly connected to the top of the base 3, a wedge plate adjusting screw 11 is penetrated at the center of the front side of the top of the pressure block 6, the wedge plate adjusting screw 11 penetrates the pressure block 6 and is threadedly connected to the top of the wedge block 1, pressure block fixing screws 12 are penetrated on both sides of the left and right sides of the rear side of the top of the pressure block 6, the bottom of the pressure block fixing screw 12 penetrates the pressure block 6 and is threadedly connected to the top of the base 3, and wedge plate locking screws 13 are penetrated on both sides of the left and right sides of the front side of the top of the pressure block 6.

[0024] In some embodiments, see Figure 2 A back plate 7 is fixedly welded to the rear side of the pressure block 6. The pressure block 6 is designed with a back plate 7, and the gap with the base 3 is guaranteed to be no more than 0.2mm to prevent the wedge block 1 from being overloaded and causing the pressure block 6 to flip over, thereby enhancing the locking function of the wedge block 1 group. A pressure block fixing screw through hole 8 that cooperates with the pressure block fixing screw 12 is opened on the top of the pressure block 6, and a pressure block fixing screw threaded hole 4 that cooperates with the pressure block fixing screw 12 is opened on the left and right sides of the top of the base 3.

[0025] In some embodiments, see Figure 2An adjusting screw threaded hole 2 for use with a wedge plate adjusting screw 11 is provided at the center of the top of the wedge block 1, and a pressing block fixing screw 12 passes through the pressing block fixing screw through hole 8 and is threadedly connected to the inner cavity of the pressing block fixing screw threaded hole 4.

[0026] In some embodiments, see Figure 2 A wedge plate adjusting screw through hole 10 cooperating with the wedge plate adjusting screw 11 is provided at the center of the top front side of the pressure block 6, and a locking nut is provided on the top thread sleeve on the surface of the wedge plate adjusting screw 11. The wedge plate adjusting screw 11 passes through the wedge plate adjusting screw through hole 10 and is threadedly connected with the inner cavity of the adjusting screw threaded hole 2.

[0027] In some embodiments, see Figure 2 The left and right sides of the front side of the base 3 are fixedly connected to the limiting slide rails 5, the left and right sides of the wedge block 1 are in sliding contact with the surfaces of the limiting slide rails 5 on both sides, and the rear side of the wedge block 1 is in sliding contact with the front side of the base 3.

[0028] In some embodiments, see Figure 1 and Figure 2 The left and right sides of the front side of the top of the pressing block 6 are provided with wedge plate locking screw holes 9 that cooperate with the wedge plate locking screw 13, and the top thread sleeve on the surface of the wedge plate locking screw 13 is provided with a locking nut.

[0029] In some embodiments, see Figure 1 and Figure 2 The bottom of the wedge plate locking screw 13 passes through the wedge plate locking screw hole 9 and contacts the top of the wedge block 1.

[0030] In some embodiments, see Figure 2 The slope of the wedge block 1 is 1:20. Eight groups of wedge blocks 1 with a slope of 1:20 and wedge plate adjustment screws 11 and wedge plate locking screws 13 are used for adjustment and locking, which reduces the difficulty of precision adjustment operation, improves fault tolerance and work efficiency, and the mating surface with the cylindrical flange is an arc surface. The base 3 is welded to the turbine top cover.

[0031] When in use, eight groups of symmetrically evenly distributed 1:20 slope wedges are installed on the outer ring of the barrel tile flange. The wedge plate adjusting screw 11 can be adjusted to lift the wedge block 1, and the wedge plate locking screw 13 can be adjusted to press down the wedge block 1. The 1:20 slope ratio of the wedge block 1 group can achieve a 0.05mm change in the barrel tile gap in the radial direction for every 1mm axial movement of the wedge block 1 during adjustment, thereby realizing the conversion of the adjustment accuracy of the barrel tile gap from micron level to millimeter level adjustment, reducing the operating difficulty, improving the fault tolerance rate and work efficiency. The locking nut and the M16 locking nut are respectively assembled on the wedge plate locking screw 13 and the wedge plate adjusting screw 11 to lock the wedge block 1 to move up and down, and the limiting slide rail 5 locks the wedge block 1 to move left and right to lock the wedge block 1 to lock the barrel tile gap. The contact point between the wedge block 1 and the water guide tile flange is designed as an arc surface to increase the fit and contact area between the two, thereby improving the instability and force concentration of the origin contact.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for adjusting and locking the gap of a water turbine barrel shoe, comprising a wedge (1), characterized in that: A base (3) is sleeved and installed on the rear side of the surface of the wedge block (1), and a pressure block (6) is fixedly connected to the top of the base (3). A wedge plate adjustment screw (11) is arranged through the center of the front side of the top of the pressure block (6). The wedge plate adjustment screw (11) passes through the pressure block (6) and is threadedly connected to the top of the wedge block (1). Pressure block fixing screws (12) are arranged through the left and right sides of the rear side of the top of the pressure block (6). The bottom of the pressure block fixing screw (12) passes through the pressure block (6) and is threadedly connected to the top of the base (3). Wedge plate locking screws (13) are arranged through the left and right sides of the front side of the top of the pressure block (6).

2. The device for adjusting and locking the gap of a water turbine barrel shoe according to claim 1, characterized in that: A pressure block back plate (7) is fixedly welded to the rear side of the pressure block (6), a pressure block fixing screw through hole (8) cooperating with the pressure block fixing screw (12) is provided on the top of the pressure block (6), and pressure block fixing screw threaded holes (4) cooperating with the pressure block fixing screw (12) are provided on both left and right sides of the top of the base (3).

3. The device for adjusting and locking the gap of the water turbine barrel shoe according to claim 2, characterized in that: An adjusting screw threaded hole (2) for use with a wedge plate adjusting screw (11) is provided at the center of the top of the wedge block (1), and the pressing block fixing screw (12) passes through the pressing block fixing screw through hole (8) and is threadedly connected to the inner cavity of the pressing block fixing screw threaded hole (4).

4. The device for adjusting and locking the gap of the water turbine barrel shoe according to claim 3, characterized in that: A wedge plate adjusting screw through hole (10) cooperating with the wedge plate adjusting screw (11) is formed through the center of the front side of the top of the pressure block (6); a locking nut is provided on the top thread sleeve of the surface of the wedge plate adjusting screw (11); the wedge plate adjusting screw (11) passes through the wedge plate adjusting screw through hole (10) and is threadedly connected to the inner cavity of the adjusting screw threaded hole (2).

5. The device for adjusting and locking the gap of a water turbine barrel shoe according to claim 1, characterized in that: The left and right sides of the front side of the base (3) are fixedly connected to the limit slide rails (5), the left and right sides of the wedge block (1) are in sliding contact with the surfaces of the limit slide rails (5) on both sides, and the rear side of the wedge block (1) is in sliding contact with the front side of the base (3).

6. The device for adjusting and locking the gap of a water turbine barrel shoe according to claim 1, characterized in that: The left and right sides of the top front side of the pressure block (6) are provided with wedge plate locking screw holes (9) that cooperate with the wedge plate locking screw (13), and a locking nut is provided on the top thread sleeve of the surface of the wedge plate locking screw (13).

7. The device for adjusting and locking the gap of the water turbine barrel shoe according to claim 6, characterized in that: The bottom of the wedge plate locking screw (13) passes through the wedge plate locking screw hole (9) and contacts the top of the wedge block (1).

8. The device for adjusting and locking the gap of a water turbine barrel shoe according to claim 1, characterized in that: The inclination of the wedge block (1) is 1:20, and the mating surface with the cylindrical flange is an arc-shaped surface. The base (3) is welded to the top cover of the turbine.

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