CN106100203A - A kind of water-cooled machine of band water-cooled footstep structure - Google Patents

Abstract

The invention provides a water-cooled motor with a water-cooled bearing structure, which includes an inner cylinder of a machine base and an outer cylinder of the machine base, which are coaxially arranged and adopt an integral cylindrical structure, and water channel ribs are evenly distributed on the outer wall of the inner cylinder of the machine base along the circumference. Above, the outer cylinder of the machine base and the water channel ribs are fitted in an interference fit and assembled by shrink fit, and a cooling water circulation channel is formed between the inner cylinder of the machine base and the outer cylinder of the machine base; the two ends of the inner cylinder of the machine base and the outer cylinder of the machine base respectively pass through the The rear end cover is sealed, and a water tank for cooling the bearing is arranged in the front and rear end covers. The front and rear end covers are composed of a circular ring and a labyrinth water tank. The water tank is coaxially arranged outside the bearing. The water tank and the circular ring are fitted in an interference fit and assembled by shrink fit. The water-cooled motor provided by the invention has a water-cooled bearing structure, can effectively cool the bearings at both ends of the motor, has simple manufacturing procedures, small deformation of the inner and outer cylinders of the machine base, and good water-tightness of the cooling system.

Description

A water-cooled motor with a water-cooled bearing structure

technical field

The invention relates to a water-cooled motor with a water-cooled bearing structure, which is installed vertically to drive a load agitator, and belongs to the technical field of motors.

Background technique

As the motor driving the agitator, because the load requires low-speed start, high-speed operation and high-torque dragging, variable-frequency motors and two-speed motors are usually used. Currently, variable-frequency motors are widely used. When the load is running at low speed, the frequency conversion motor is adjusted to low frequency. At this time, the motor generates a lot of heat and the temperature rises. Because the cooling effect of water is better than that of air, and the loss is small and pollution-free, the motor is designed as a water-cooled structure.

Water-cooled motors, from the perspective of cooler structure, mainly have two types: backpack type and water jacket type. The backpack cooling box is usually designed on the top or side of the motor, and it is full of water pipes. When the motor is working, it passes through the ventilation holes at the junction of the cooling box and the motor frame and the cooling medium (air) inside the motor. The internal fan stirs the air and mixes with the water. The relatively low-temperature water in the tube is exchanged to achieve the purpose of cooling. Water-jacketed structure, the machine base is generally cylindrical, and the inner cylinder of the machine base is mostly rolled and welded steel plates, the outer circumference of the inner cylinder is welded or processed water channels, the outer wall of the machine base is rolled or tailor-welded steel plates, and the two ends of the inner and outer cylinders are welded. The end plate is welded with the inner and outer cylinders to seal the cooling water channel, so as to achieve the purpose of cooling the motor.

Due to the fanless design of the water-cooled motor, the bearings at both ends of the motor cannot be cooled. When the motor is running at low frequency and low speed, the bearings will heat up greatly, which will affect the service life. At the same time, the coil welding of the inner and outer cylinders of the machine base has disadvantages such as many weld seams, high welding process requirements, and large deformation of the machine base during processing and subsequent use.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water-cooled motor with simple manufacturing process, small deformation of the inner and outer cylinders of the machine base, good water-tightness of the cooling system, and a water-cooled bearing structure.

In order to solve the above technical problems, the technical solution of the present invention is to provide a water-cooled motor with a water-cooled bearing structure, which is characterized in that it includes coaxially arranged inner cylinders of the machine base and outer cylinders of the machine base, both of which adopt integral cylindrical structures. The water channel ribs are evenly distributed on the outer wall of the inner tube of the machine base along the circumference, and the outer tube of the machine base and the water channel ribs are fitted in an interference fit and assembled by shrink-fitting. A cooling water circulation channel is formed between the inner tube of the machine base and the outer tube of the machine base; The two ends of the cylinder and the outer cylinder of the machine base are respectively sealed by the front and rear end covers, and the front and rear end covers are provided with water tanks for cooling the bearings.

Preferably, the water tanks in the front and rear end covers are respectively connected with bearing cooling water inlet pipes and drain pipes, the cooling water inlet pipes are connected to the machine base water inlet joints through four-way joints, the external water source is connected to the four-way joints, and the water supply tank Cooling water and the cooling water circulation channel are formed between the inner cylinder of the machine base and the outer cylinder of the machine base; the water inlet joint of the machine base is respectively connected to the bearing cooling water inlet pipes on the front and rear end covers, the cooling Water circulation channel and water inlet pipe.

Preferably, the water outlet joint of the machine base and the water inlet joint of the machine base are located on the same side of the machine base, and are symmetrically separated by water channel ribs.

Preferably, the inner cylinder of the base is made of cold-drawn seamless steel pipe, and the inner cylinder wall of the base is provided with a lead-out wire hole for the internal winding, and a hole matching the size of the lead-out wire hole is used to prevent cooling. Water enters the terminal box sealing water ring of the inner winding.

Preferably, the outer cylinder of the base is made of cold-drawn seamless steel pipe.

Preferably, the front and rear end covers are composed of a water tank and a circular ring, the water tank is coaxially arranged outside the bearing, and the water tank and the circular ring are interference fit and assembled by shrink fit.

Preferably, bushings are provided on both sides of the bearing.

Preferably, both ends of the water tank are provided with O-shaped sealing grooves for preventing leakage of cooling water.

Preferably, the water tank is an axial labyrinth channel.

Preferably, the cooling water circulation channel is arranged to form a Z-shaped channel through staggered channel ribs.

Preferably, S-shaped water channel ribs are added in the Z-shaped water channel to form a mixed S-shaped and Z-shaped water channel.

Compared with the prior art, the water-cooled motor with water-cooled bearing structure provided by the present invention has the following beneficial effects:

1. Reduce the welding of the inner and outer cylinders of the machine base to avoid the problem of seam leakage;

2. Process the inner circle of the outer cylinder of the machine base to reduce the water resistance;

3. The labyrinth water tank makes the bearing water cool evenly and there is no dead angle;

4. The water tank of the end cover and the ring are sealed with an interference fit and an O-shaped sealing ring on the end face, which avoids the leakage of the bearing cooling water.

Description of drawings

Fig. 1 is the assembly diagram of the water-cooled motor with the water-cooled bearing structure provided by Embodiment 1;

Fig. 2 is the K direction view of Fig. 1;

Fig. 3 is the P direction view of Fig. 1;

Fig. 4 is a schematic diagram of Z-shaped water channels welded to the inner cylinder of the base in Example 1;

Fig. 5 is a schematic diagram of Z-shaped and S-shaped mixed water channels welded to the inner cylinder of the machine base in Example 2.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

Figure 1 is an assembly drawing of the water-cooled motor with a water-cooled bearing structure provided in this embodiment. The water-cooled motor with a water-cooled bearing structure includes a coaxially arranged machine base inner cylinder 8 and a machine base outer cylinder 7. Both ends of the cylinder 8 and the base outer cylinder 7 are sealed by front and rear end covers respectively. When the motor is running, cooling water is passed through the housing between the inner cylinder 8 and the outer cylinder 7 of the machine base to take away the heat of the motor.

Referring to FIG. 2 , the inner cylinder 8 of the machine base adopts an integral circular pipe, and the water channel ribs 14 - 1 are evenly distributed along the circumference and welded on the outer wall of the inner cylinder 8 of the machine base. The outer cylinder 7 of the machine base adopts an integral cylinder, and the outer cylinder 7 of the machine base and the channel rib 14-1 are processed into an interference fit and assembled in a shrink fit manner.

The inner cylinder 8 of the machine base is made of cold-drawn seamless steel pipe. The inner cylinder 8 of the machine base is equipped with windings, and the winding lead-out hole is arranged on the wall of the cylinder. The sealing water ring 9 is designed according to the size of the lead-out wire hole to prevent the cooling water from entering the winding. junction box.

The outer cylinder 7 of the machine base is made of cold-drawn seamless steel pipe, and the inner circle is processed into a simplified form. The processing size forms an interference fit with the water channel rib 14-1, and is assembled in a shrink-fit method.

Combined with Figure 2, the front cover is composed of a water tank 4-1 and a ring 6-1, which are assembled by interference fit and shrink fit, and at the same time, there are O-shaped sealing grooves 5-1 on both ends , 5-2, prevent cooling water from leaking.

Combined with Figure 3, the rear end cover is composed of a water tank 4-2 and a ring 6-2. The water tank 4-2 and the ring 6-2 are assembled by interference fit and shrink fit, and at the same time, there are O-shaped sealing grooves 5- 3. 5-4, prevent cooling water from leaking.

The water tanks 4-1 and 4-2 are axial labyrinth water channels, bearings 2-1 and 2-2 and bushings 3-1 and 3-2 are assembled under the inner circle, and the labyrinth water channels make the bearings 2-1 and 2-2 Uniform cooling without dead ends. Outlet pipe 1-1, 1-2 is designed in water tank 4-1, 4-2, and drain pipe 13, 16 is drawn from the outside, avoids drilling water leakage problem.

The water tank 4-1, 4-2 circulating cooling water is respectively provided through the bearing cooling water inlet pipes 11, 15, and the bearing cooling water inlet pipes 11, 15 are connected with the machine base water inlet joint 10 through a four-way joint, thereby reducing the arrangement of water pipes. The machine base water outlet joint 12 and the machine base water inlet joint 10 are located on the same side of the machine base, symmetrically separated by water channel ribs 14-1, and are used to discharge the water in the cooling water circulation channel between the machine base inner cylinder 8 and the machine base outer cylinder 7 .

Referring to Fig. 4, the water channel rib 14-1 is welded on the outer wall circumference of the machine base inner cylinder 8 to form a Z-shaped cooling water circulation channel, and the outer circle is processed after welding. The Z-type cooling water circulation channel is suitable for small-power motors.

Example 2

Referring to FIG. 5 , the difference between this embodiment and Embodiment 1 is that: S-shaped and Z-shaped mixed cooling water circulation channels are formed on the circumference of the outer wall of the inner cylinder 8 of the machine base.

A single water channel reinforcement 14-1 is welded in each curved ring of the S-shaped water channel reinforcement 14-2, so that the curved ring is separated into two water channels.

S-type and Z-type mixed cooling water circulation channels are suitable for high-power motors.

Claims (10)

1. the water-cooled machine of a band water-cooled footstep structure, it is characterised in that: that include being coaxially disposed, all use monoblock type circle The support inner core (8) of barrel structure and support urceolus (7), water channel muscle is uniformly distributed along the circumference on support inner core (8) outer wall, support urceolus (7) with water channel muscle interference fit and being assembled by hot jacket mode, cooling water between support inner core (8) and support urceolus (7), is formed Cyclic water channel；The two ends of support inner core (8) and support urceolus (7) by forward and backward end cap seal, are provided with in forward and backward end cap respectively For cooling down the tank of described bearing.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 1, it is characterised in that: described front and back ends Being connected to bearing cooling water inlet pipe and drain pipe on tank in lid respectively, cooling water inlet pipe is connect with support water inlet by four-way connection Head (10) connects, and external source accesses four-way connection, shape between supply flume cooling water and described support inner core and support urceolus Become cooling water circulation water channel；The bearing that support water supply connector (10) is connected on described front and back ends lid respectively by four-way connection is cold But water inlet pipe, described cooling water circulation water channel and water inlet water source tube.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 1, it is characterised in that: described support inner core (8) using solid drawn tube, described support inner core (8) barrel is provided with the extraction string holes of internal winding, and draws with described That wire hole size matches, for the rosette ring for the sealing liquid (9) stoping cooling water to enter internal winding.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 1, it is characterised in that: described support urceolus (7) solid drawn tube is used.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 1, it is characterised in that: described front and back ends Lid is made up of with annulus tank, tank with being located in outside described bearing, tank and annulus interference fit and by hot jacket mode Assembling.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 5, it is characterised in that: described bearing both sides It is provided with lining.

7. the water-cooled machine of a kind of band water-cooled footstep structure as described in claim 5 or 6, it is characterised in that: described tank Both ends of the surface be provided with for prevent cool down water reveal O shape seal groove.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 5, it is characterised in that: described tank is axle To labyrinth type water channel.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 1, it is characterised in that: described cooling water follows Ring water channel is arranged by staggered water channel muscle and is formed Z-type.

The water-cooled machine of a kind of band water-cooled footstep structure the most as claimed in claim 9, it is characterised in that: at described Z-type water Increase S type water channel muscle in road, form S type and the water channel of Z-type mixing.