BG1051U1 - Explosion-proof engine-contactor group - Google Patents

Abstract

The utility model finds application in on-water vessels. Its efficiency is higher, and it consists of a DC motor (1) with an output shaft (2) with a shaft seal (8) and a contactor (3), which is electrically connected to the electric motor. The electric motor and the contactor are located within a sealed casing (4). The feeding (5) and command (6) cables of the contactor are led out of the sealed casing side opposite to the shaft through water-proof sealing bushes (7). The casing is symmetrical to the electric motor axis. A front sealing shield (9) is mounted at the face of the body of the electric motor at the side of the output shaft. Between the shield and the electric motor body face there is an O-shaped seal (10). The screw propeller is attached to the outer side of the shield. The contractor is attached to the rear shield (11) of the electric motor through an L-shaped strip (12). The electric coupling between the positive rotor end of the electric motor and the intermediate positive power terminal of the contactor is a support electroconductive isolated bus (13).

Description

Technical field

The utility model refers to an explosion-proof motor-contactor group applicable in water transport, in particular for the propulsion of light and medium surface vessels.

BACKGROUND OF THE INVENTION

Known explosion-proof motor-contactor group [http://www.side-power.com, http: // www.side-power.com/index.php?id= 128], consisting of a direct current motor and located sideways a contactor electrically connected to the motor. This electrical connection is with insulated multi-core cables from the contactor to the motor terminals, which cables follow the topology of the structure. The propeller is connected to the motor shaft by an appropriate gear. The electric motor and the contactor are housed in a sealed two-piece housing. The power and control cables of the contactor are pulled from the opposite side of the propeller side of the sealed housing through waterproof sealing bushings. The sealed casing is asymmetrical to provide space for the contactor to be housed. Shaft sealing is located in the opening of the flange of the gearbox. The sealing of the entire structure provides explosion protection when used in rooms that are saturated with explosive fumes, such as gasoline. This motor-contact group operates on an impulse basis and is used as an aid in maneuvering vessels.

This explosion-proof motor-contactor group is of limited use and efficiency, since the electric motor operates under extreme conditions in an enclosed space, therefore it quickly overheats and has a very short pulse duration, that is, it must be switched off frequently and then wait to cool down and then back on. Therefore, the maneuvers performed are not always effective and timely.

Another disadvantage of the known explosion-proof motor-contactor group is that due to the asymmetry of the sealed housing, it has poor installation characteristics.

Another disadvantage of the known explosion-proof motor-contactor group is that it is still expensive due to the asymmetry of the sealed housing. This is because cables are used to connect the contactor to the larger motor section to avoid overheating. In addition, the manufacture of the two asymmetric shells of the asymmetric sealing jacket also requires more tools.

The task of the utility model is to create an explosion-proof motor-contact group with increased efficiency and improved mounting characteristics.

Another object of the utility model is to reduce the construction of the explosion-proof motor-contactor group.

The technical nature of the utility model

This task is solved by creating the first variant of non-ventilated explosion-proof motor-contactor group, which consists of a direct current motor with an output shaft with sealing shaft and a contactor connected electrically to the electric motor. The electric motor and the contactor are housed in a sealed housing, and the power and control cables of the contactor are led out from the opposite side of the shaft to the sealed housing through a waterproof sealing sleeve. The sealed housing is symmetrical to the axis of the motor. A front sealing shield is mounted on the front of the motor body on the side of the output shaft. An O-shaped flat gasket is clamped between the sealing shield and the head of the motor body, and the sealing sealing is fixed in the corresponding socket in the corresponding socket. The rotor screw is appropriately attached to the outside of the sealing shield. The contactor is secured to the rear shield of the motor via a G-shaped plate, and the electrical connection between the positive end of the motor rotor and the mean positive power output of the contactor is in the form of a support electrically conductive insulated bar.

A second variant of the non-ventilated explosion-proof motor-contactor group is also created, in which the sealed housing is shortened and sealed by a sealing ring between the outer wall of the motor body and the inner wall of the sealed housing, and between the rear face of the front face 9 and the front face of the front face. the body of the motor has a sealing seal.

A third variant of the non-ventilated explosion-proof motor-contact group has been created, where the power and control cables of the contactor are pulled out from the opposite side of the shaft by the sealed housing through an outlet pipe and a flexible hose is put on it.

A first variant of a ventilated explosion-proof motor-contactor group has been created, where in the cylindrical body of the motor at the end of the output shaft there is a ventilation opening, against which an air vent with an inlet ventilation pipe with an inlet ventilation pipe is provided in the sealed housing. In the face of the sealed housing on the side of the contactor there is an outlet ventilation opening with an outlet ventilation pipe with an outlet ventilation hose, and a suction fan in the direction of the ventilation vent is mounted in the throat of the outlet ventilation pipe to the contactor on the sealed housing.

A second variant of the ventilated explosion-proof motor-contactor group has been created, where the outlet pipe and the flexible hose put on it are outlet for the ventilation flow, the pipe is expanded and the fan is located in the extension.

A third variant of the ventilated explosion-proof motor contactor group has been created, where the ventilation opening passes into the inlet ventilation pipe.

It is possible that the various variants of the ventilated explosion-proof motor-contactor group may be formed by the inlet vent pipe in the sealed housing in the area above the periphery of the rear shield, and the opening in the motor body is closed.

The advantage of all variants of explosion-proof motor-contactor group is that they have increased efficiency and improved mounting characteristics in case of cheaper construction.

Explanation of the annexed figures

The utility model is explained in more detail by an exemplary embodiment of the explosion-proof motor-contactor group shown in the accompanying figures, where:

- Figure 1 is a longitudinal sectional view of a first embodiment of a non-ventilated explosion-proof motor-contact group;

- Figure 2 is a longitudinal sectional view of a second embodiment of a non-ventilated explosion-proof motor-contact group;

- Figure 3 is a partial longitudinal section of a third embodiment of an explosion-proof non-ventilated motor-contactor group;

- Figure 4 is a front view of the face of an explosion-proof motor-contact group in all embodiments;

- Figure 5 is a partial section through AA of Figure 4;

- Figure 6 is a diagram of the electrical control of the explosion-proof motor-contactor group in all variants;

- Figure 7 is a longitudinal sectional view of a first embodiment of an explosion-proof ventilated motor-contact group;

Figure 8 is a view in A of Figure 7;

Figure 9 is a partial longitudinal section of a second embodiment of an explosion-proof ventilated motor-contactor group;

- Figure 10 is a partial longitudinal section of a third embodiment of an explosion-proof ventilated motor-contactor group;

Figure 11 is a partial longitudinal section of a fourth embodiment of an explosion-proof ventilated motor-contactor group.

Exemplary implementation of the utility model

In the first embodiment (FIG. 1), the non-ventilated explosion-proof motor-contactor group consists of a direct current motor 1 with an output shaft 2 with sealing seals 8 and a contactor 3 connected electrically to the motor 1. The motor 1 and the contactor 3 are arranged in a sealed housing 4. The feeder 5 and command 6 cables of contactor 3 are projected from the opposite side of the shaft 2 to the sealed housing 4 through waterproof sealing sleeves 7. The sealed housing 4 is symmetrical to the axis of the motor 1.

A front sealing shield 9 is mounted on the head of the body of the motor 1 from the side of the output shaft 2. An O-shaped flat seal 10 is clamped between the sealing shield 9 and the head of the body of the motor 1 on the connection side of the sealing shield 9, respectively. socket is sealed sealing 8. To the outside of the sealing shield 9 is appropriately joined by a propeller (shown schematically in the figures and designated as a "propeller"), which is located in the water space indicated in the figure as "water". The contactor 3 is attached to the rear shield I of the electric motor 1 by means of a cam plate 12. The electrical connection between the positive end of the rotor of the electric motor 1 and the mean positive power output of the contactor 3 is in the form of a support electrically conductive insulated bus 13. The motor contactor group is located indoors, which in the figures is designated as "Premises".

In a second embodiment of the non-ventilated explosion-proof motor-contactor group (Fig. 2), the sealed housing 4 is shortened and sealed by a sealing ring 14 between the outer wall of the body of the motor 1 and the inner wall of the sealed housing 4 and between the rear ones. 9 and the head of the body of the electric motor 1 has a sealing gasket 15. In FIG. 2 for clarity is indicated by "Attaching the housing to the engine".

In a third embodiment of the non-ventilated explosion-proof motor-contactor group (Fig. 3), the supply 5 and command 6 cables of the contactor 3 are pulled out from the opposite side of the shaft 2 of the sealed housing 4 through an outlet pipe 16 and a flexible hose 17 is put thereon.

In a first embodiment of a ventilated explosion-proof motor-contactor group (Fig. 7), there is a ventilation opening 18 in the cylindrical body of the electric motor 1 at the end of the output shaft 2, against which there is an inlet ventilation opening with an inlet ventilation pipe 19 with an inlet vent pipe 19 in the sealed housing 4. hose 20. In the head of the sealed housing 4 on the side of contactor 3 there is an outlet ventilation opening (Figs. 7 and 8) with an outlet ventilation pipe 21 with an outlet ventilation hose 22, and at the outlet of the outlet ventilation pipe 21 up to the contactor 3 in. rhu face of the high barrier sleeve 4 is mounted suction fan 23 in the direction of the outlet vent hose 22.

In a further embodiment of the ventilated explosion-proof motor-contactor group (Fig. 9), the outlet pipe 16 and the flexible hose 17 fitted thereto are exiting the ventilation stream, the pipe 16 being expanded and the fan 23 arranged in the extension.

In a further embodiment of the ventilated explosion-proof motor-contactor group (Fig. 10), the ventilation opening 18 passes into the inlet ventilation pipe 19.

In various embodiments of the explosion-proof motor-contactor group, the inlet vent pipe 19 is formed in the sealed housing 4 in the area above the periphery of the rear shield 11, and the opening 18 in the body of the motor 1 is closed.

In FIG. 4 and 5 illustrate the construction of the face of the explosion-proof motor-contactor group in all embodiments, wherein the through holes 24 are for attaching the propeller (not shown in the figures) to the explosion-proof motor-contactor group. The through holes 25 are threaded and sealed between the front sealing shield 9 and the housing through screw connections 26.

4. The connection between the shield 9 and the electric motor 1 is made by other screw connections 27 through the through holes 28 in the sealing shield 9 and the blind threaded holes 29 in the body of the electric motor 1.

FIG. 6 is a schematic diagram of the electrical control of the explosion-proof motor-contactor group in all variants, showing the directions of the supply current I in the two variants of switching. The contacts are designated as 1, 2, 3 and 4, the motor parts are referred to as "stator" and "rotor".

Utility model action

The explosion-proof motor-contact group in all its variants works as follows:

The electrical control and power supply of the contactor 3 and the motor 1 is provided by the known scheme (Fig. 6), which allows the motor 1 to operate in reverse, since the switching of the contactor changes the direction of the current I in the stator.

Usually in some spaces of the vessel, such as a yacht, due to the nature of the volatile fuel mechanisms, such as the main engine, the power generator, the fuel tank, etc. explosive vapors of this fuel may occur. The construction of the explosion-proof motor-contactor group in all variants completely isolates the space in which sparks appear - the area of the contactor 3 and the brushes of the electric motor 1. This is because the sealed housing 4 completely covers this area. The connection between the shield 9 and the housing 4 (Figs. 4 and 5) provides reliable sealing at the head of the motor contactor group, and the commanding 6 and 5 power cables of the contactor pass through suitable nodes that provide sealing.

At the same time, positioning the contactor 3 behind the brush area of the electric motor 1 makes the structure more compact. The stability of this arrangement is ensured by the D-shaped plate 12 and the implementation of the electrical connection between the positive end of the rotor of the motor 1 and the mean positive power output of the contactor 3 as a support electrically conductive insulated bus 13.

In the embodiment of FIG. 1, the sealed housing 4 covers the entire area from the sealing shield 9 to the outlet of the cables 5 and 6 through the waterproof sealing sleeves 7.

In the embodiment of FIG. 3, an outlet pipe 16 with a hose 17 thereto is used instead of a waterproof sleeve 7. This allows the cables 5 and 6, which are located in the hose 17, to receive additional mechanical protection. It is mandatory that the end 17.1 of the hose 17 must be in a safe area where there is no explosive vapor. This prevents this vapor from penetrating the hose 17 and the pipe 16 into the spark zone.

In the embodiment of FIG. 2 the housing 4 is shortened to the brush area of the electric motor 1. This is convenient for larger motors as it simplifies construction and reduces material consumption. In this case, the shield 9 has no openings 25. The shortened housing 4 is sealed directly to the housing of the electric motor 1 by the sealing ring 14 clamped between them.

The options described above are for motor contactor groups whose operating impulses are short. This is not always sufficient for the efficient operation of the motor-contactor group, especially for larger vessels.

The short operating impulses do not allow the vessel in question to move in the right direction when maneuvering quickly. To overcome this disadvantage, while maintaining all the explosion-proofing properties, ventilation is provided in the following motor contactor group variants.

In the embodiment of FIG. 7 and FIG. 8, ventilation is provided by the fan 23, which draws air from the sealed zone. Ventilation flow is provided from the inlet of the hose 20 (which is obligatory in a space where there is no and no vapors of fuel, such as ambient air) through the inlet vent pipe 19, the ventilation opening 18 in the body of the motor 1 through the space with the brushes of the electric motor 1, the fan 23 and the outlet vent pipe 21 of the descending hose 22 (which is obligatory in a space where there is no and no vapors of fuel, such as ambient air).

In the embodiment of FIG. 9, the ventilation outlet pipe 21 accommodates the fan 23 in its extension, and at the same time serves to output cables 5 and 6. This simplifies the construction.

Ventilation requires above all the space around the brushes of the motor

1. When the sealing has a short housing 4, the inlet vent pipe 19 is formed directly into the housing of the motor 1 (Fig. 10). Where this is not possible with electric motors 1 which are structurally reduced heating of the rotor stator space, the inlet vent pipe 19 is at the end of the shortened housing 4 to the brush area of the electric motor 1.

Claims (7)

Claims 1. Explosion-proof motor-contactor group, which consists of a direct current motor with an output shaft with sealing gasket and a contactor connected electrically to the electric motor, such as the electric motor and the contactor; 1051 The sockets are housed in a sealed housing, and the power and control cables of the contactor are projected from the opposite side of the sealed housing through a waterproof sealing sleeve, characterized in that the sealed housing (4) is symmetrical to the axis of the motor (1). ) and the front sealing shield (9) is mounted on the head of the motor body (1) on the side of the output shaft (2), with O between the sealing shield (9) and the body of the motor motor (1). -shaped flat seal (10), and from p the sealing side of the sealing shield (9) in the corresponding socket is sealed sealing sealing (8), whereby the contactor (3) is attached to the back shield (11) of the motor (1) by a D-shaped plate (12), and the electrical connection between the positive end of the rotor of the motor (1) and the mean positive output of the contactor (3) is in the form of a support electrically conductive insulated bar (13). Motor contactor group according to claim 1, characterized in that the sealed housing (4) is shortened and sealed by a sealing ring (14) between the outer wall of the motor body (1) and the inner wall of the sealed housing (4). 4) and there is a sealing gasket (15) between the rear face of the front shield (9) and the head of the motor body (1). Motor contactor group according to claims 1 and 2, characterized in that the power (5) and control (6) cables of the contactor (3) are projected from the opposite side of the shaft (2) through the sealed housing (4) through an outlet pipe (16) and a flexible hose (17). Motor contactor group according to claim 1, characterized in that a cylindrical body of the motor (1) at the end of the output shaft (2) has a ventilation opening (18), against which there is an inlet ventilation housing (4). a vent with an inlet vent pipe (19) and an inlet vent hose (20), and at the head of the sealing casing (4), on the contactor side (3), there is an outlet vent with an outlet vent tube (21) and with an outlet vent a hose (22) and at the throat of the outlet vent pipe (21) to a contact a suction fan (23) is mounted on the face of the sealed housing (4) in the direction of the outlet ventilation hose (22). Motor contactor group according to claims 1, 3 and 4, characterized in that the outlet pipe (16) and the flexible hose (17) fitted thereto are exiting the ventilation stream, the pipe (16) being extended into the fan (23) is located in the extension. Motor contactor group according to claim 1, 2, 4 or 5, characterized in that the ventilation opening (18) passes into the inlet ventilation pipe (19). Motor contactor group according to claim 1, 2, 4, 5 and 6, characterized in that the inlet vent pipe (19) is formed in the sealed housing (4) in the area above the periphery of the rear shield (11), and the opening (18) in the motor body (1) is closed. Application: 11 figures FIG. 1, FIG. 2, FIG. 3 Entrance to> wmaU-I The input> α of vmlu4 - FIG. 11; 9, FIG. 10