1. An apparatus for working ground surfaces or roadways, comprising:
a machine frame;
a drum housing supported from the machine frame;
a working drum located in the drum housing;
at least one spraying system including at least first and second outlet nozzle assemblies arranged next to one another and directed toward the working drum for spraying agents, each of the first and second outlet nozzle assemblies including:
an outlet nozzle including a nozzle channel;
a drivable closing mechanism including a closing element movable on a specified path between an open position in which the nozzle channel is fully uncovered, and a closed position in which the closing element closes the nozzle channel; and
the outlet nozzle and the closing element being configured such that a flow cross-section between the nozzle channel and the closing element is variable in accordance with a position of the closing element on the specified path; and
a controller operably associated with the drivable closing mechanisms and configured to drive the closing mechanisms.
2. The apparatus of claim 1, wherein:
the closing elements are positionable by the controller in identical intermediate positions between their open and closed positions.
3. The apparatus of claim 1, wherein:
the closing elements are positionable by the controller in individually different intermediate positions between their open and closed positions.
4. The apparatus of claim 1, wherein:
the flow cross-section between each nozzle channel and its respective closing element decreases as the closing element moves toward the closed position.
5. The apparatus of claim 1, wherein:
each closing element is movable and positionable coaxially with the nozzle channel of its respective outlet nozzle.
6. The apparatus of claim 1, wherein:
each outlet nozzle includes a variable nozzle geometry such that the flow cross-section between the nozzle channel and its respective closing element decreases as the closing element moves toward the closed position.
7. The apparatus of claim 1, wherein:
each drivable closing mechanism includes a displacement measuring sensor configured to supply a measured displacement signal to the controller; and
the controller is configured to send an actuation signal to the drivable closing mechanism to control a current position of the closing element.
8. The apparatus of claim 1, wherein:
the controller is configured to cause an additional movement of each closing element beyond the closed position to enable material accumulations in andor in front of the outlet nozzle to be removed.
9. The apparatus of claim 1, wherein:
the nozzle channel of each outlet nozzle includes on an inlet side a first section having a conical cross-section narrowing in a direction of flow of the outlet nozzle.
10. The apparatus of claim 1, wherein:
each closing element includes a first section facing the outlet nozzle and a second section on an opposite side of the first section from the outlet nozzle, the first section having a smaller cross-sectional area than the second section, the second section being sized to close the nozzle channel.
11. The apparatus of claim 1, wherein:
each outlet nozzle includes a first section on an inlet side of the outlet nozzle, the first section including an outer wall including at least one cut-out configured to conduct spraying agent into the outlet nozzle.
12. The apparatus of claim 11, wherein:
each cut-out has a width which changes in a closing direction of the closing element.
13. The apparatus of claim 12, wherein:
the nozzle channel of each outlet nozzle includes a constant cross-section.
14. The apparatus of claim 11, wherein:
the nozzle channel of each outlet nozzle includes a constant cross-section.
15. The apparatus of claim 1, wherein:
the controller is configured to control the flow cross-section of each outlet nozzle assembly in response to at least one parameter selected from the group consisting of:
a currently specified flow rate;
a currently used spraying agent;
a transverse slope of the spraying system; and
a pressure in the spraying system.
16. A method of working ground surfaces or roadways with an apparatus including a working drum, at least one spraying system including at least first and second outlet nozzle assemblies for spraying agents arranged next to one another and directed towards the working drum, each nozzle assembly including an outlet nozzle including a nozzle channel and a closing element movable between an open position in which the nozzle channel is uncovered and a closed position in which the nozzle channel is closed, the method comprising:
(a) operating the working drum; and
(b) driving the closing elements during step (a) to intermediate positions between their open and closed positions to adjust a variable selectable flow cross-section for each outlet nozzle assembly.
17. The method of claim 16, wherein:
in step (b) the closing elements are driven to identical intermediate positions.
18. The method of claim 16, wherein:
in step (b) the closing elements are driven to different intermediate positions.
19. The method of claim 16, wherein:
in step (b) the flow cross-section for each outlet nozzle is controlled in accordance with a currently specified flow rate.
20. The method of claim 16, wherein:
in step (b) the flow cross-section for each outlet nozzle is controlled in accordance with a currently used spraying agent.
21. The method of claim 16, wherein:
in step (b) the flow cross-section for each outlet nozzle is controlled in accordance with a transverse slope of the spraying system.
22. The method of claim 16, wherein:
in step (b) the flow cross-section for each outlet nozzle is controlled in accordance with a pressure in the spraying system.
23. The method of claim 16, wherein the variable selectable flow cross-section of each outlet nozzle assembly is generated by an interaction of a geometry of the outlet nozzle with the position of the closing element.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A motorpump unit comprising:
a motor having a pot-shaped motor housing and a brush plate provided in the motor housing, and
a pump having a pump housing, wherein
the motor is secured axially to an end face of the pump housing,
the brush plate forms the terminating face of the motor with respect to the pump housing,
the edge region of the pot-shaped motor housing facing the pump housing has a seal-accommodating stage,
the region of the brush plate radially adjacent to the edge region of the motor housing likewise has a seal-accommodating stage, and
inserted into said seal-accommodating stages is a seal which is axially compressed through securing of the pump housing on the motor.
2. The motorpump unit according to claim 1, wherein
the seal-accommodating stage of the brush plate is slanted so that the seal-accommodating stage has sides that enclose an angle less than 90\xb0.
3. The motorpump unit according to claim 1, wherein
the seal-accommodating stage of the motor housing has a slant on which is provided a monitoring area at which the presence of the seal is detected.
4. The motorpump unit according to claim 1, wherein the motor is secured axially to an end face of the pump housing by means of a screw connection.
5. The motorpump unit according to claim 1, wherein a rotor shaft of the motor is ducted through a bearing into the pump housing and secured to the pump housing in a bearing of the pump.
6. The motorpump unit according to claim 2, wherein the seal-accommodating stage has sides that enclose an angle of about 45\xb0.
7. The motorpump unit according to claim 1, wherein the seal is circumferential sealing washer.
8. A method for sealing motorpump unit comprising the steps of:
providing a motor having a pot-shaped motor housing and a brush plate provided in the motor housing, and
providing a pump having a pump housing, wherein the brush plate forms the terminating face of the motor with respect to the pump housing, the edge region of the pot-shaped motor housing facing the pump housing and the region of the brush plate radially adjacent to the edge region of the motor housing form a mutually adjacent seal-accommodating stage;
inserting a seal into the mutually adjacent seal-accommodating stage;
securing the motor axially to an end face of the pump housing.
9. The method according to claim 8, wherein
the seal-accommodating stage of the brush plate is slanted so that the seal-accommodating stage has sides that enclose an angle less than 90\xb0.
10. The method according to claim 8, wherein
the seal-accommodating stage of the motor housing has a slant on which is provided a monitoring area at which the presence of the seal is detected.
11. The method according to claim 8, wherein the motor is secured axially to an end face of the pump housing by means of a screw connection.
12. The method according to claim 8, wherein a rotor shaft of the motor is ducted through a bearing into the pump housing and secured to the pump housing in a bearing of the pump.
13. The method according to claim 9, wherein the seal-accommodating stage has sides that enclose an angle of about 45\xb0.
14. The method according to claim 9, wherein the seal is circumferential sealing washer.