阅读说明：本技术 一种改进的水轮发电机定子软端箍 (Improved stator soft end hoop of hydraulic generator ) 是由 张士昂 于 2021-08-31 设计创作，主要内容包括：本发明涉及水轮发电机制造技术领域,提供了一种改进的水轮发电机定子软端箍。本发明是一种改进的水轮发电机定子软端箍,包括：玻璃纤维绳组件、测温电阻和接线盒,所述测温电阻沿定子线圈端部圆周均匀布置,玻璃纤维绳组件将沿定子线圈端部圆周设置的测温电阻均匀粘接在定子线圈端部,测温电阻通过设置在定子线圈机座上的引线与接线盒连接,本发明取代了钢管或圆钢的整个加工,焊接、包扎过程,也取代了原有端箍支撑结构件的加工制作、焊接固定及安装调整的繁杂工艺,同时,完善了定子端部测温监测系统,保障机组安全运行。(The invention relates to the technical field of hydraulic generator manufacturing, and provides an improved hydraulic generator stator soft end hoop. The invention is a kind of improved hydrogenerator stator soft end hoop, including: the temperature measuring resistor is uniformly arranged along the circumference of the end part of the stator coil, the temperature measuring resistor arranged along the circumference of the end part of the stator coil is uniformly bonded to the end part of the stator coil by the glass fiber rope assembly, and the temperature measuring resistor is connected with the junction box through a lead arranged on a base of the stator coil.)

1. The utility model provides a soft end hoop of modified hydraulic generator stator which characterized in that includes: glass fiber rope subassembly (1), temperature measuring resistor (2) and terminal box (3), stator coil (4) tip circumference is evenly arranged along temperature measuring resistor (2), and temperature measuring resistor (2) that stator coil (4) tip circumference set up will be followed in glass fiber rope subassembly (1) and evenly bond at stator coil (4) tip, and temperature measuring resistor (2) are connected with terminal box (3) through the lead wire that sets up on stator coil (4) frame.

2. The improved hydro-generator stator soft end band according to claim 1, wherein the fiberglass rope assembly (1) comprises: the temperature measuring device comprises a glass fiber rope (11) and a glass fiber tube (12), wherein the glass fiber tube (12) binds the ends of the glass fiber rope (11), the temperature measuring resistor (2) and the stator coil (4) together to form a whole.

3. The improved stator soft end hoop of the hydraulic generator according to claim 2, wherein the diameter of the glass fiber rope (11) is 28-30mm, and when the improved stator soft end hoop is used, the glass fiber rope (11) is firstly soaked in the mixed organic solution of EP03 glue, curing agent 30 and acetone for 15-30 minutes.

4. The improved stator soft end hoop of the hydraulic generator as claimed in claim 3, wherein the EP03 glue, the curing agent 30 and the acetone are mixed according to a ratio of 5: 3: 2.

5. The improved hydro-generator stator soft end band according to claim 2, characterized in that the glass fiber tube (12) has a diameter of 4-6 mm.

6. The improved hydro-generator stator soft end band according to claim 1, characterized in that the temperature measuring resistor (2) is a Pt100 three wire platinum thermal resistor.

7. The utility model provides an installation step of soft end hoop of modified hydraulic generator stator, its installation step is:

s1: after the coil inserting work of the winding of the stator coil (4) is finished, soaking the glass fiber rope (11) in a mixed organic solution of EP03 glue, a curing agent 30 and acetone for 15-30 minutes;

s2: the temperature measuring resistors (2) are uniformly arranged and installed at the end part of the stator coil (4) along the circumference of the stator coil (4), and the ends of the impregnated glass fiber rope (11), the temperature measuring resistors (2) and the stator coil (4) are bound together by a glass fiber pipe (12);

s3: after 2-8 hours, the ends of the impregnated glass fiber rope (11), the temperature measuring resistor (2) and the stator coil (4) are solidified into a whole;

s4: the temperature measuring resistor (2) surrounds the stator coil (4) and is led to the junction box (3) through a circuit, and the soft end hoop is integrally installed.

Technical Field

The invention relates to the technical field of hydraulic generator manufacturing, in particular to an improved hydraulic generator stator soft end hoop.

Background

Among the prior art, the end hoop of hydraulic generator stator adopts "hard end hoop" structure that steel pipe or round steel made more: and the steel ring coated with the insulation is used for binding and fixing the end part of the stator coil and is fixed on the tooth pressing plate through a rigid supporting structure.

As in application No.: the invention discloses CN201020623398.1 relates to a water turbine motor component, in particular to an adjustable stator end hoop supporting device. It solves the hydraulic turbine group operation in-process that prior art exists, and the stator coil can be because thermal energy produces radial displacement, and the end hoop can't adapt to this displacement change to can make the end hoop throw off the stator coil, cause the motor to break down, lower technical problem of production efficiency.

Such conventional "hard end band" suffers from the following two disadvantages: firstly, under the normal operation state of the generator, the temperature of the middle section of the stator coil is increased to be higher than the temperature rise of the end part, but when the generator is in phase-in operation, the metal structural part at the end part of the stator coil can generate local high temperature, and the temperature rise of the end part is even higher than that of the middle section of the stator coil. In the design of a medium-sized and small-sized hydraulic generator, temperature measuring resistors are only embedded at the bottom of a stator coil and between two layers of stator coils to monitor the operating temperature of the middle section of the stator coil, but when the generator is in phase-in operation, the end part of the stator coil generates heat, and necessary monitoring is lacked; second, when the stator coil end space is small, the installation of such a "hard end band" is very difficult.

Disclosure of Invention

In order to solve the problem that the temperature of the middle section of the stator coil is higher than the temperature rise of the end part under the normal running state of the generator, when the generator runs in a phase, a metal structural part at the end part of the stator coil can generate local high temperature, and the temperature rise of the end part is even higher than that of the middle section of the stator coil. In the design of a medium-sized and small-sized hydraulic generator, temperature measuring resistors are only embedded at the bottom of a stator coil and between two layers of stator coils to monitor the operating temperature of the middle section of the stator coil, but when the generator is in phase-in operation, the end part of the stator coil generates heat, and necessary monitoring is lacked; the invention provides an improved stator soft end hoop of a hydraulic generator, which solves the problem that the installation of the hard end hoop is very difficult when the end space of a stator coil is small.

An improved hydro-generator stator soft end band comprising: glass fiber rope subassembly, temperature measuring resistor and terminal box, temperature measuring resistor evenly arranges along stator coil tip circumference, and the temperature measuring resistor that glass fiber rope subassembly will set up along stator coil tip circumference evenly bonds at stator coil tip, and temperature measuring resistor is connected with the terminal box through the lead wire that sets up on the stator coil frame.

Preferably, the fiberglass rope assembly comprises: the temperature measuring device comprises a glass fiber rope and a glass fiber pipe, wherein the glass fiber rope, a temperature measuring resistor and the end part of a stator coil are bound together by the glass fiber pipe to form a whole.

Preferably, the diameter of the glass fiber rope is 28-30mm, and when the glass fiber rope is used, the glass fiber rope is firstly soaked in the mixed organic solution of EP03 glue, curing agent 30 and acetone for 15-30 minutes.

Preferably, the EP03 glue, the curing agent 30 and the acetone are mixed according to the ratio of 5: 3: 2.

Preferably, the diameter of the glass fiber tube is 4-6 mm.

Preferably, the temperature measuring resistor is a Pt100 three-wire platinum thermal resistor.

The utility model provides an installation step of soft end hoop of modified hydraulic generator stator, its installation step is:

s1: after the coil inserting work of the stator coil winding is finished, soaking the glass fiber rope in the mixed organic solution of EP03 glue, curing agent 30 and acetone for 15-30 minutes;

s2: the end parts of the stator coil are uniformly provided with temperature measuring resistors along the circumference of the stator coil, and the dipped glass fiber ropes, the temperature measuring resistors and the end parts of the stator coil are bound together by using glass fiber tubes;

s3: after 2-8 hours, the impregnated glass fiber rope, the temperature measuring resistor and the end part of the stator coil are solidified into a whole;

s4: the temperature measuring resistor surrounds the stator coil base and is led to the junction box through a line, and the soft end hoop is integrally installed.

The invention has the advantages that: the phi 30 glass fiber rope is fixedly adopted at the end part of the stator coil and is a non-metallic material, so that the heating caused by the induction of current in a magnetic field at the end part like the traditional steel ring is avoided, the glass fiber rope has good insulation property, strong heat resistance, good corrosion resistance and high mechanical strength, and the insulating material does not need to be bound; after the soft body of the glass fiber rope is impregnated with EP03 glue, curing agent 30 and acetone, the glass fiber rope can be better dissolved and cured, the glass fiber rope is more fastened after being bound with the coil, the strength is higher, when the end part of the stator coil is bound and fixed with the soft glass fiber rope, each coil and the glass fiber rope with the diameter of 30 are fastened together only by using a glass fiber pipe with the diameter of 5, any support required by a hoop at a steel end is not needed, the process structure is simple, the operation is safe and reliable, and the soft body is particularly suitable for being installed in a narrow space at the end part of the stator; the stator end temperature measurement monitoring system is perfected, and the safe operation of the unit is guaranteed.

Drawings

FIG. 1 is a schematic view of the present invention;

1. a fiberglass rope assembly; 2. a temperature measuring resistor; 3. a junction box; 4. a stator coil; 11. a glass fiber rope; 12. a glass fiber tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the installation methods and technical terms mentioned in the present invention are technical terms that are already clearly known in the technical field, and thus, the explanation thereof is not repeated. Moreover, the same reference numerals are used for the same components, which do not affect and should not constitute an exact understanding of the technical solutions for a person skilled in the art.

The first embodiment is described with reference to fig. 1:

an improved hydro-generator stator soft end band comprising: glass fiber rope subassembly 1, temperature measuring resistor 2 and terminal box 3, temperature measuring resistor 2 evenly arranges along stator coil 4 tip circumference, the temperature measuring resistor 2 that glass fiber rope subassembly 1 will set up along stator coil 4 tip circumference evenly bonds at stator coil 4 tip, temperature measuring resistor 2 is connected with terminal box 3 through the lead wire that sets up on stator coil 4 frame, so set up, during the use, glass fiber rope subassembly 1 and the direct ligature of stator coil 4 tip, at stator coil 4 tip, along stator coil 4 circumference equipartition installation temperature measuring resistor 2, when ligature end hoop, glass fiber rope subassembly 1, temperature measuring resistor 2 forms a whole with stator coil 4 tip, it is fixed to need not other supports, temperature measuring resistor 2 lead wire encircles stator coil 4 frame and connects to monitoring system through terminal box 3.

In the second embodiment, the following is described with reference to fig. 1 on the basis of the first embodiment:

the glass fiber rope assembly 1 comprises: the temperature measuring device comprises a glass fiber rope 11 and a glass fiber pipe 12, wherein the glass fiber pipe 12 binds the ends of the glass fiber rope 11, the temperature measuring resistor 2 and the stator coil 4 together to form a whole, the diameter of the glass fiber rope 11 is 30mm, the glass fiber rope 11 is soaked in mixed organic solution of EP03 glue, a curing agent 30 and acetone for 30 minutes in use, and the glass fiber rope 11 is soaked in the mixed organic solution of the EP03 glue, the curing agent 30 and the acetone and directly bound with the ends of the glass fiber pipe 12 and the stator coil 4.

In the third embodiment, the following is explained with reference to fig. 1 on the basis of the second embodiment:

according to the arrangement, the EP03 glue, the curing agent 30 and the acetone are mixed according to the ratio of 5: 3: 2, the material is in a soft sticky state and is cured after being soaked in the curing agent for 28 hours, and the soft body of the glass fiber rope 11 can be better dissolved and cured after being soaked in the EP03 glue, the curing agent 30 and the acetone. And after being bound with the end part of the stator coil 4, the stator coil is more tightly fixed and has higher strength.

In a fourth embodiment, the following is described with reference to fig. 1 on the basis of the third embodiment:

the diameter of the glass fiber tube 12 is 5mm, and the arrangement is such that when the end part of the stator coil 4 is bound and fixed with the soft glass fiber rope 11, each coil and the phi 30 glass fiber rope 11 are fastened together only by the phi 5 glass fiber tube without any support required by a steel end hoop, and the process structure is simple, the operation is safe and reliable, and the glass fiber tube is particularly suitable for being installed in a narrow space at the end part of the stator coil 4.

In the fifth embodiment, the following description is made with reference to fig. 1 on the basis of the fourth embodiment:

the temperature measuring resistor 2 is a Pt100 three-wire platinum thermal resistor, and the Pt100 three-wire platinum thermal resistor is arranged, so that a temperature measuring and monitoring system at the end part of the stator coil 4 is perfected, and the safe operation of the unit is guaranteed.

In a sixth embodiment, a description is given, with reference to fig. 1, of:

the utility model provides an installation step of soft end hoop of modified hydraulic generator stator, its installation step is:

s1: after the coil inserting work of the winding of the stator coil 4 is finished, soaking the glass fiber rope 11 in the mixed organic solution of EP03 glue, curing agent 30 and acetone for 15-30 minutes;

s2: the temperature measuring resistors 2 are uniformly arranged and installed at the end part of the stator coil 4 along the circumference of the stator coil 4, and the impregnated glass fiber rope 11, the temperature measuring resistors 2 and the end part of the stator coil 4 are bound together by a glass wire pipe 12;

s3: after 2-8 hours, the impregnated glass fiber rope 11, the temperature measuring resistor 2 and the end part of the stator coil 4 are solidified into a whole;

s4: the temperature measuring resistor 2 surrounds the stator coil 4 and is led to the junction box 3 through a circuit, and the soft end hoop is integrally installed.

The working principle of the invention is as follows: the utility model provides a soft end hoop of modified hydraulic generator stator, wherein, temperature measuring resistor 2 evenly arranges along stator coil 4 tip circumference, and the temperature measuring resistor 2 that the glass fiber rope subassembly 1 will set up along stator coil 4 tip circumference evenly bonds at stator coil 4 tip, and temperature measuring resistor 2 is connected with terminal box 3 through the lead wire that sets up on stator coil 4 frame, glass fiber rope subassembly 1 includes: the temperature measuring device comprises a glass fiber rope 11 and a glass fiber pipe 12, wherein the glass fiber pipe 12 binds the glass fiber rope 11, the temperature measuring resistor 2 and the end part of a stator coil 4 together to form a whole, after the coil inserting work of the stator coil 4 is finished, the phi 30 glass fiber rope 11 with a proper length is soaked in a mixed organic solution of EP03 glue, a curing agent 30 and acetone for about 15-30 minutes to form a soft end hoop finished product, the temperature measuring resistor 2 is uniformly arranged and installed at the end part of the stator coil 4 along the circumference of the stator coil 4, the phi 30 glass fiber rope 11, the temperature measuring resistor 2 and the end part of the stator coil 4 are bound together by using the phi 5 glass fiber pipe 12, after 8 hours of completion, the glass fiber rope 11, the end part of the stator coil 4 and the temperature measuring resistor 2 are solidified into a whole, other supports are not needed for fixation, the lead wire of the temperature measuring resistor 2 is led to a junction box 3 around a base of the stator coil 4, the lead wire is laid according to the actual condition and is fixed as necessary, the whole processing, welding and wrapping processes of a steel pipe or round steel are replaced, the complex processes of processing, manufacturing, welding, fixing, installing and adjusting of the original end hoop supporting structural part are also replaced, the temperature measuring resistor 2 uses a Pt100 three-wire platinum thermistor, a stator end temperature measuring monitoring system is also perfected, and the safe operation of a unit is guaranteed.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.